Limiting Factors of Photosynthesis

Review

are limiting factors for the rate of photosynthesis. They all affect the rate of the photosynthetic reaction, but in different ways.

A Limiting factor is something present in the environment in such short supply that it restricts processes

Some text here about the topic of discussion

Light intensity, carbon dioxide concentration and temperature

Multiple Choice

How does temperature affect photosynthesis?

• Increases the rate at which enzymes work

• Gives the plant energy to perform photosynthesis

• Stops certain enzymes that interfere with photosynthesis working

• Allows chlorophyll to react

Multiple Choice

When it is chilly and raining outside, there is no photosynthesis taking place. What is the limiting factor?

• Temperature

• Rainfall

• Carbon Dioxide

• Oxygen

Multiple Choice

What is a limiting factor?

• The factor which increases the rate of a reaction

• The factor that limits the reaction rate

• The factor that limits the rate at which an enzyme is destroyed

• The factor which decreases the rate of reaction

Multiple Choice

Which of these will not affect photosynthesis?

• Light
• Temperature
• Glucose Availability
• Carbon Dioxide

Multiple Choice

Increasing temperature can increase enzyme activity to a certain point. Then what happens?

• The enzymes have completed all the reactions so stop

• The enzymes have been denatured or destroyed

• Nothing - the rate continues to increase all the time

• Nothing - enzymes do not need temperature to work

Multiple Choice

If a plant starts to receives more carbon dioxide, what happens to the rate of photosynthesis?

• Increases

• Decreases

• Stays the same

• Nothing happens because carbon dioxide is not needed

Multiple Choice

How can greenhouses increase the rate of photosynthesis?

• Controlling and trapping heat to increase photosynthesis
• Stopping rainfall affecting plant growth
• Surrounding plants in the colour green makes them more likely to photosynthesise
• Plants are only given what they need instead of just taking everything they can find

Multiple Choice

Which of the following would have affect the rate of photosynthesis?

• amount of water
• carbon dioxide concentration
• temperature
• all of these

Multiple Choice

Look at the diagram. Which gas would most likely be found in the greatest amount in the bubbles?

• oxygen
• nitrogen
• ozone
• carbon dioxide
  

Multiple Choice

A student is collecting the gas given off from a plant in bright sunlight at a temperature of 27°C. The gas being collected is probably ________. To be sure of this gas he will do the _________ test

• oxygen, glowing splint test

• carbon dioxide, lime water test

• ATP, newton meter test

• glucose, Benedict test

Multiple Choice

If carbon dioxide is completely removed from a plant’s environment, what would you expect to happen to the plant’s production of high-energy sugars (rate of photosynthesis)?

• Sugar production will likely increase.
• Sugars will not be produced.
• The rate of sugar production will decrease .
• Fewer sugars will be produced at first, but then the plant will recover.

Multiple Choice

The rate of photosynthesis is affected by all of the following except

• the amount of salt.
• the availability of water.
• light intensity.
• temperature (enzymes).

Multiple Choice

Which conclusion best matches the trends shown on the graph?

• Bean plants produce more ATP than corn plants.
• Corn plants require more oxygen than bean plants.
• Corn plants release more carbon dioxide than bean plants.
• Corn plants produce sugars at a faster rate than bean plants.

Multiple Choice

Which lettered graph represents the affect of light intensity on photosynthetic rate?

• A

• B

• C

• D

Multiple Choice

What is the role of chlorophyll in photosynthesis?

• To produce sugar

• To trap light energy

• To trap heat energy

• Make plants green

Multiple Choice

Which energy conversion occurs as a result of photosynthesis?

• Chemical energy to heat energy

• Heat energy to light energy

• Light energy to chemical energy

• Heat energy to chemical energy

Multiple Choice

Which lettered graph represents the effect of temperature on photosynthetic rate?

• A

• B

• C

• D

Multiple Choice

Which word equation correctly describes the process of photosynthesis?

• carbon dioxide + oxygen ---> glucose + water

• carbon dioxide + water ---> glucose + oxygen

• glucose + oxygen ---> carbon dioxide + water

• oxygen + water ---> glucose + carbon dioxide

Multiple Choice

Which of the following is a limiting factor of photosynthesis?

• Availability of carbon dioxide

• Availability of oxygen

• Availability of sugar

• All of these

Multiple Choice

Plants undergo both photosynthesis and cellular respiration

• true

• false

Multiple Choice

Which lettered graph represents the effect of carbon dioxide gas on photosynthetic rate?

• A

• B

• C

• D

Multiple Choice

Which factor would not increase the production of glucose by photosynthesis in plants?

• increased sunlight exposure

• extra rainfall

• increased carbon dioxide levels

• freezing temperatures

Multiple Choice

Which part of the leaf has most chloroplasts

• epidermis tissue

• palisade mesophyll

• spongy mesophyll

• xylem

Multiple Choice

Which part of the leaf are tubes that bring water from the roots

• epidermis tissue

• palisade mesophyll

• spongy mesophyll

• xylem

Multiple Choice

Which part of the leaf has air spaces to allow carbon dioxide to flow through the leaf and diffuse into cells.

• epidermis tissue

• palisade mesophyll

• spongy mesophyll

• xylem

Multiple Choice

Which of the following shows the balanced chemical symbol equation for photosynthesis?

• A

• B

• C

• D

Multiple Choice

What is the main energy change that happens in photosynthesis?

• chemical --> light

• light --> kinetic

• light --> chemical

• kinetic --> light

Multiple Choice

Where is chlorophyll found in plant cells?

• cytoplasm

• chloroplast

• mitochondria

• vacuole

Multiple Choice

What substance can glucose be converted to, which is the transport carbohydrate of plants?

• starch

• cellulose

• sucrose

• amino acids

Multiple Choice

What substance can glucose be converted into, which is the energy storage carbohydrate of plants?

• cellulose

• sucrose

• amino acids

• starch

Multiple Choice

Which substance can glucose be converted to, which strengthens plant cell walls?

• starch

• cellulose

• amino acids

• sucrose

Multiple Choice

Which of the following organelles would you not expect to be present in onion root cells?

• cell wall

• vacuole

• chloroplast

• mitochondrion

Multiple Choice

All of the definitions below are descriptions of a 'limiting factor'.

Which of these is the IGCSE Biology definition?

• a factor in the environment that runs out

• something present in the environment in such short supply that it restricts life processes

• a factor in the environment that is in short supply

• something present in the environment in such short supply that it stops life processes

Multiple Choice

Click on the picture to make it larger.

Which of the following can you conclude about point X from this graph alone?

I. light intensity limits the rate of photosynthesis

II. as light intensity increases, rate of photosynthesis increases

III. CO₂ concentration limits the rate of photosynthesis

• I and II only

• I and III only

• II and III only

• I, II and III

Multiple Choice

Click on the picture to make it larger.

Which of the following can you conclude about point Y from this graph?

I. light intensity does not limit the rate of photosynthesis

II. the plant has stopped photosynthesising

III. the rate of photosynthesis could be limited by a shortage of water or CO₂

• I and II only

• I and III only

• II and III only

• I, II and III

Multiple Choice

Click on the picture to make it larger.

What do curves C and D suggest is limiting the rate of photosynthesis?

• light intensity

• carbon dioxide concentration

• temperature

• water

Multiple Choice

Click on the picture to make it larger.

What do curves B and D suggest is limiting the rate of photosynthesis?

• light intensity

• carbon dioxide concentration

• temperature

• water

Multiple Choice

Supplying extra heat and carbon dioxide is more expensive, but may be worth it if the rate of photosynthesis greatly increases.

Click on the graph to make it larger.

Which of the following would it not be worth doing for a plant grower?

• increasing the CO₂ from 0.03% to 0.1% at a temperature of 20^oC.

• increasing the CO₂ from 0.03% to 0.1% at a temperature of 25^oC.

• increasing the temperature from 20^oC to 25oC at a CO₂ concentration of 0.03%

• increasing the temperature from 20^oC to 25oC at a CO₂ concentration of 0.1%

Multiple Choice

Why is the chemical sodium hydrogencarbonate given to water plants in photosynthesis practicals?

• it is used to produce chlorophyll

• it allows the plant to respire

• it supplies the plant with CO₂ gas when it dissolves

• it is a source of glucose

Multiple Choice

All of the statements below are correct definitions of photosynthesis.

Which of these is the IGCSE Biology definition of photosynthesis?

• the process that produces glucose and oxygen, using CO₂, water, light and chlorophyll

• the process that converts light energy into chemical energy

• the process by which plants produce carbohydrates from raw materials using light energy

• the process that converts inorganic compounds into organic compounds

Multiple Choice

Four test-tubes are set up as shown.

Click on the picture to make it larger.

Which test-tube contains the most carbon dioxide after one hour?

• A

• B

• C

• D

Multiple Choice

The raw materials of photosynthesis.

• CO₂ and H₂O

• CO₂ and C₆H₁₂O₆

• O₂ and H₂O

• O₂ and C₆H₁₂O₆

Multiple Choice

The waste material of photosynthesis.

• CO₂

• H₂O

• O₂

• C₆H₁₂O₆

Multiple Choice

Why do plants conduct photosynthesis?

• To make light
• To make mitochondria
• To make glucose
• To release carbon dioxide

Multiple Choice

What is an Abiotic Factor?

• A NON-living factor that can affect an ecosystem

• A living factor that can affect an ecosystem

• The carrying capacity of an ecosystem

Multiple Choice

What is a Biotic Factor?

• The carrying capacity of an ecosystem

• A NON-living factor that can affect an ecosystem

• A living factor that can affect an ecosystem

Multiple Select

Check all of the boxes that show examples of biotic factors.

• Rain

• Humans hunting

• Predators

• Wildfire

Multiple Select

Check all of the boxes that are examples of abiotic factors.

• Prey

• Rainfall

• A pack of wolves

• A tornado

Multiple Choice

What is a limiting factor?

• Factors that always increase a population

• Factors that always decrease a population

• Resources that are unlimited

• Factors/resources that limit how many organisms can live in an area at the same time

Multiple Choice

If humans were to release a pack of wolves into the forest, what type of factor would this be?

• Abiotic

• Biotic

Multiple Choice

How does temperature affect photosynthesis?

• Increases the rate at which enzymes work
• Gives the plant energy to perform photosynthesis
• Stops certain enzymes that interfere with photosynthesis working

Multiple Choice

When it is chilly and raining outside, there is no photosynthesis taking place. What is the limiting factor?

• Temperature
• Rainfall
• Carbon Dioxide

Multiple Choice

What is a limiting factor?

• The factor which increases the rate of a reaction
• The factor that limits the reaction rate
• The factor that limits the rate at which an enzyme is destroyed

Multiple Choice

Which of these will not affect photosynthesis?

• Light
• Temperature
• Glucose Availability
• Carbon Dioxide

Multiple Choice

Increasing temperature can increase enzyme activity to a certain point. Then what happens?

• The enzymes have completed all the reactions so stop
• The enzymes have been denatured or destroyed
• Nothing - the rate continues to increase all the time

Multiple Choice

If a plant receives more carbon dioxide, what happens to the rate of photosynthesis?

• Increases
• Decreases
• Stays the same

Multiple Choice

How can greenhouses increase the rate of photosynthesis?

• Controlling and trapping heat to increase photosynthesis
• Stopping rainfall affecting plant growth
• Surrounding plants in the colour green makes them more likely to photosynthesise
• Plants are only given what they need instead of just taking everything they can find

Multiple Choice

Which of the following would have affect the rate of photosynthesis?

• amount of water
• carbon dioxide concentration
• temperature
• all of these

Multiple Choice

Look at the diagram. Which gas would most likely be found in the greatest amount in the bubbles?

• oxygen
• nitrogen
• ozone
• carbon dioxide
  

Multiple Choice

A student is collecting the gas given off from a plant in bright sunlight at a temperature of 27°C. The gas being collected is probably ________.

• oxygen
• carbon dioxide
• ATP
• glucose

Multiple Choice

If carbon dioxide is completely removed from a plant’s environment, what would you expect to happen to the plant’s production of high-energy sugars (rate of photosynthesis)?

• Sugar production will likely increase.
• Sugars will not be produced.
• The rate of sugar production will decrease .
• Fewer sugars will be produced at first, but then the plant will recover.

Multiple Choice

The rate of photosynthesis is affected by all of the following except

• the amount of salt.
• the availability of water.
• light intensity.
• temperature (enzymes).

Multiple Choice

Which conclusion best matches the trends shown on the graph?

• Bean plants produce more ATP than corn plants.
• Corn plants require more oxygen than bean plants.
• Corn plants release more carbon dioxide than bean plants.
• Corn plants produce sugars at a faster rate than bean plants.

Multiple Choice

Which lettered graph represents the affect of light intensity on photosynthetic rate?

• A

• B

• C

• D

Multiple Choice

Which lettered graph represents the effect of carbon dioxide gas on photosynthetic rate?

• A

• B

• C

• D

Multiple Choice

Which lettered graph represents the effect of temperature on photosynthetic rate?

• A

• B

• C

• D

Multiple Choice

Which factor would not increase the production of glucose by photosynthesis in plants?

• freezing temperatures

• extra rainfall

• increased carbon dioxide levels

• increased sunlight exposure

Multiple Choice

How is the leaf adapted to do photosynthesis?

• The leaf's upper layer is thin and transparent to allow light to pass through.
• The leaf's palisade layer has the most chloroplast to absorb the maximum amount of light possible.
• The leaf's lower layer has many stomata to allow gases to diffuse.
• All of the descriptions above are true.

Multiple Choice

This diagram is a leaf cell. Which of the following refers to letter D?

• Nucleus
• Vacuole
• Chloroplast
• Cell wall

Multiple Choice

How does temperature affects photosynthesis rate?

• As temperature increases, photosynthesis rate also increases.
• As temperature decreases, photosynthesis rate also decreases.
• Plants cannot photosynthesis if the temperature is too cold or too hot. 
• All of the statements are true.

Multiple Choice

Glucose (sugar) is also produced during photosynthesis. What do plants use glucose for?

• Source of energy.
• Supports plant growth and development.
• Keeps plants warm.
• Prevents plants from dying.

Multiple Choice

What will happen to the photosynthesis rate if you increase the intensity of light?

• Photosynthesis rate will increase.
• Photosynthesis rate will decrease.
• Photosynthesis rate will remain the same.
• Photosynthesis will stop.

Multiple Choice

What is required for photosynthesis to begin?

• water and oxygen

• oxygen and carbon dioxide

• carbon dioxide and water

• chocolate and pop

Multiple Choice

What is produced during photosynthesis?

• water and carbon dioxide

• glucose and carbon dioxide

• glucose and oxygen

• apples and bananas

Multiple Choice

Which of the following are required for cellular respiration to begin?

• oxygen and glucose

• oxygen and water

• oxygen and carbon dioxide

• apples and bananas

Multiple Choice

What is produced during cellular respiration?

• oxygen and energy (ATP)

• carbon dioxide and oxygen

• carbon dioxide and energy (ATP)

• noodles

Multiple Choice

Plants undergo both photosynthesis and cellular respiration

• true

• false

Multiple Choice

Photosynthesis happens in the chloroplast

• true

• false

Multiple Choice

Cellular Respiration happens in the chloroplast

• true

• false

Multiple Choice

Cellular respiration happens in the mitochondria

• true

• false

Multiple Choice

Where do plants get the carbon needed for photosynthesis

• ground

• water

• air

• Target

Multiple Choice

The source of energy for photosynthesis is

• water

• soil

• air

• the sun

Multiple Choice

Temperature, light, air, water, and soil are all  _____  parts of the environment

• alive
• biotic 
• abiotic
• living

Multiple Choice

What is the original source of almost all energy in most ecosystems?

• carbohydrates
• sunlight
• water
• carbon

Multiple Choice

All the living things in an environment

• Biotic factors
• Traits
• Animals
• Natural Selection

Multiple Choice

The graph below shows the rate of photosynthesis of a plant in an experiment. What is the limiting factor of photosynthesis at high light intensity?

• Light intensity

• carbon dioxide concentration

• temperature

Multiple Choice

The graph shows the rate of photosynthesis plotted against an unknown factor. What is the factor limiting the rate of photosynthesis as shown in the graph?

• carbon dioxide concentration

• light intensity

• number of chloroplasts

• temperature

Multiple Choice

The diagram below shows a photosynthesis investigation. The plant has leaves that are green in the middle and white round the edges. Which leaf areas lack only one factor needed for photosynthesis?

• 1 and 2

• 1 and 3

• 2 and 4

• 3 and 4

Multiple Choice

Which of the following equations represents the overall chemical reaction for photosynthesis?

• 6O₂+ 6H₂O → C₆H₁₂O₆+ 6O₂

• C₆H₁₂O₆ + 6H₂O→ 6O₂+ 6O₂

• 6CO₂+ 6H₂O→ C₆H₁₂O₆+ 6O₂

• 6O₂ + 6H₂O→ C₆H₁₂O₆ + 6CO₂

Multiple Choice

Which lettered graph represents the affect of light intensity on photosynthetic rate?

• A

• B

• C

• D

Multiple Choice

When it is chilly and raining outside, there is no photosynthesis taking place. What is the limiting factor?

• Temperature
• Rainfall
• Carbon Dioxide

Multiple Choice

Which of these will not affect photosynthesis?

• Light
• Temperature
• Glucose Availability
• Carbon Dioxide

Multiple Choice

If a plant receives more carbon dioxide, what happens to the rate of photosynthesis?

• Increases
• Decreases
• Stays the same

Multiple Choice

What is a limiting factor?

• The factor which increases the rate of a reaction
• The factor that limits the reaction rate
• The factor that limits the rate at which an enzyme is destroyed

Multiple Choice

Which lettered graph represents the effect of temperature on photosynthetic rate?

• A

• B

• C

• D

Multiple Choice

Glucose (sugar) is also produced during photosynthesis. What do plants use glucose for?

• Source of energy.
• Supports plant growth and development.
• Keeps plants warm.
• Prevents plants from dying.

Multiple Choice

How does temperature affects photosynthesis rate?

• As temperature increases, photosynthesis rate also increases.
• As temperature decreases, photosynthesis rate also decreases.
• Plants cannot photosynthesis if the temperature is too cold or too hot. 
• All of the statements are true.

Multiple Choice

The rate of photosynthesis is affected by all of the following except

• the amount of salt.
• the availability of water.
• light intensity.
• temperature (enzymes).

Multiple Choice

Which conclusion best matches the trends shown on the graph?

• Bean plants produce more ATP than corn plants.
• Corn plants require more oxygen than bean plants.
• Corn plants release more carbon dioxide than bean plants.
• Corn plants produce sugars at a faster rate than bean plants.

Multiple Choice

Which of these pairs represents the reactants of photosynthesis?

• Oxygen and water

• Glucose and oxygen

• Water and glucose

• Carbon dioxide and water

Multiple Choice

Which of these pairs represents the products of photosynthesis?

• Oxygen and water

• Glucose and oxygen

• Water and glucose

• Carbon dioxide and water

Multiple Choice

Which of these is NOT needed for photosynthesis to occur

• Glucose

• Sunlight

• Carbon dioxide

• Water

Multiple Choice

Which of these is a source of carbon used to make glucose?

• Oxygen

• Sunlight

• Carbon dioxide

• Water

Multiple Choice

What is the purpose  of an enzyme?

• give permission for the reaction
• raise activation energy
• speed up reactions
• control how many reactions occur

Multiple Choice

After the enzyme and substrate bind together and perform the reaction, what does the substrate become?

• a substrate
• an enzyme
• a product
• an active site

Multiple Choice

Any substance that is acted upon by an enzyme is called a(n)?

• Coenzyme
• Substrate
• Vitamin
• Polypeptide

Multiple Choice

What is the rate of reaction?

• How fast a reaction is 
• How big a reaction is
• How loud a reaction is
• How much gas a reaction produces

Multiple Choice

What happens when enzymes are heated to a high temperature?

• The enzymes die.

• The shape of the enzyme are changed and it denatures

• The enzymes' amino acid sequence changes.

• The enzymes remain the same

Multiple Choice

Which of the following shows the balanced chemical symbol equation for photosynthesis?

• A

• B

• C

• D

Multiple Choice

What is the main energy change that happens in photosynthesis?

• chemical --> light

• light --> kinetic

• light --> chemical

• kinetic --> light

Multiple Choice

Where is chlorophyll found in plant cells?

• cytoplasm

• chloroplast

• mitochondria

• vacuole

Multiple Choice

What substance can glucose be converted to, which is the transport carbohydrate of plants?

• starch

• cellulose

• sucrose

• amino acids

Multiple Choice

What substance can glucose be converted into, which is the energy storage carbohydrate of plants?

• cellulose

• sucrose

• amino acids

• starch

Multiple Choice

Which substance can glucose be converted to, which strengthens plant cell walls?

• starch

• cellulose

• amino acids

• sucrose

Multiple Choice

Which of the following organelles would you not expect to be present in onion root cells?

• cell wall

• vacuole

• chloroplast

• mitochondrion

Multiple Choice

All of the definitions below are descriptions of a 'limiting factor'.

Which of these is the IGCSE Biology definition?

• a factor in the environment that runs out

• something present in the environment in such short supply that it restricts life processes

• a factor in the environment that is in short supply

• something present in the environment in such short supply that it stops life processes

Multiple Choice

Click on the picture to make it larger.

Which of the following can you conclude about point X from this graph alone?

I. light intensity limits the rate of photosynthesis

II. as light intensity increases, rate of photosynthesis increases

III. CO₂ concentration limits the rate of photosynthesis

• I and II only

• I and III only

• II and III only

• I, II and III

Multiple Choice

Click on the picture to make it larger.

Which of the following can you conclude about point Y from this graph?

I. light intensity does not limit the rate of photosynthesis

II. the plant has stopped photosynthesising

III. the rate of photosynthesis could be limited by a shortage of water or CO₂

• I and II only

• I and III only

• II and III only

• I, II and III

Multiple Choice

Click on the picture to make it larger.

What do curves C and D suggest is limiting the rate of photosynthesis?

• light intensity

• carbon dioxide concentration

• temperature

• water

Multiple Choice

Click on the picture to make it larger.

What do curves B and D suggest is limiting the rate of photosynthesis?

• light intensity

• carbon dioxide concentration

• temperature

• water

Multiple Choice

Supplying extra heat and carbon dioxide is more expensive, but may be worth it if the rate of photosynthesis greatly increases.

Click on the graph to make it larger.

Which of the following would it not be worth doing for a plant grower?

• increasing the CO₂ from 0.03% to 0.1% at a temperature of 20^oC.

• increasing the CO₂ from 0.03% to 0.1% at a temperature of 25^oC.

• increasing the temperature from 20^oC to 25oC at a CO₂ concentration of 0.03%

• increasing the temperature from 20^oC to 25oC at a CO₂ concentration of 0.1%

Multiple Choice

All of the statements below are correct definitions of photosynthesis.

Which of these is the IGCSE Biology definition of photosynthesis?

• the process that produces glucose and oxygen, using CO₂, water, light and chlorophyll

• the process that converts light energy into chemical energy

• the process by which plants produce carbohydrates from raw materials using light energy

• the process that converts inorganic compounds into organic compounds

Multiple Choice

Four test-tubes are set up as shown.

Click on the picture to make it larger.

Which test-tube contains the most carbon dioxide after one hour?

• A

• B

• C

• D

Multiple Choice

The raw materials of photosynthesis.

• CO₂ and H₂O

• CO₂ and C₆H₁₂O₆

• O₂ and H₂O

• O₂ and C₆H₁₂O₆

Multiple Choice

The waste material of photosynthesis.

• CO₂

• H₂O

• O₂

• C₆H₁₂O₆

Multiple Choice

Why do plants conduct photosynthesis?

• To make light
• To make mitochondria
• To make glucose
• To release carbon dioxide

Multiple Choice

What is an Abiotic Factor?

• A NON-living factor that can affect an ecosystem

• A living factor that can affect an ecosystem

• The carrying capacity of an ecosystem

Multiple Choice

What is a Biotic Factor?

• The carrying capacity of an ecosystem

• A NON-living factor that can affect an ecosystem

• A living factor that can affect an ecosystem

Multiple Select

Check all of the boxes that show examples of biotic factors.

• Rain

• Humans hunting

• Predators

• Wildfire

Multiple Select

Check all of the boxes that are examples of abiotic factors.

• Prey

• Rainfall

• A pack of wolves

• A tornado

Multiple Choice

What is a limiting factor?

• Factors that always increase a population

• Factors that always decrease a population

• Resources that are unlimited

• Factors/resources that limit how many organisms can live in an area at the same time

Multiple Choice

If humans were to release a pack of wolves into the forest, what type of factor would this be?

• Abiotic

• Biotic

Multiple Choice

How does temperature affect photosynthesis?

• Increases the rate at which enzymes work
• Gives the plant energy to perform photosynthesis
• Stops certain enzymes that interfere with photosynthesis working

Multiple Choice

When it is chilly and raining outside, there is no photosynthesis taking place. What is the limiting factor?

• Temperature
• Rainfall
• Carbon Dioxide

Multiple Choice

What is a limiting factor?

• The factor which increases the rate of a reaction
• The factor that limits the reaction rate
• The factor that limits the rate at which an enzyme is destroyed

Multiple Choice

Which of these will not affect photosynthesis?

• Light
• Temperature
• Glucose Availability
• Carbon Dioxide

Multiple Choice

Increasing temperature can increase enzyme activity to a certain point. Then what happens?

• The enzymes have completed all the reactions so stop
• The enzymes have been denatured or destroyed
• Nothing - the rate continues to increase all the time

Multiple Choice

If a plant receives more carbon dioxide, what happens to the rate of photosynthesis?

• Increases
• Decreases
• Stays the same

Multiple Choice

How can greenhouses increase the rate of photosynthesis?

• Controlling and trapping heat to increase photosynthesis
• Stopping rainfall affecting plant growth
• Surrounding plants in the colour green makes them more likely to photosynthesise
• Plants are only given what they need instead of just taking everything they can find

Multiple Choice

Which of the following would have affect the rate of photosynthesis?

• amount of water
• carbon dioxide concentration
• temperature
• all of these

Multiple Choice

Look at the diagram. Which gas would most likely be found in the greatest amount in the bubbles?

• oxygen
• nitrogen
• ozone
• carbon dioxide
  

Multiple Choice

A student is collecting the gas given off from a plant in bright sunlight at a temperature of 27°C. The gas being collected is probably ________.

• oxygen
• carbon dioxide
• ATP
• glucose

Multiple Choice

If carbon dioxide is completely removed from a plant’s environment, what would you expect to happen to the plant’s production of high-energy sugars (rate of photosynthesis)?

• Sugar production will likely increase.
• Sugars will not be produced.
• The rate of sugar production will decrease .
• Fewer sugars will be produced at first, but then the plant will recover.

Multiple Choice

The rate of photosynthesis is affected by all of the following except

• the amount of salt.
• the availability of water.
• light intensity.
• temperature (enzymes).

Multiple Choice

Which conclusion best matches the trends shown on the graph?

• Bean plants produce more ATP than corn plants.
• Corn plants require more oxygen than bean plants.
• Corn plants release more carbon dioxide than bean plants.
• Corn plants produce sugars at a faster rate than bean plants.

Multiple Choice

Which lettered graph represents the affect of light intensity on photosynthetic rate?

• A

• B

• C

• D

Multiple Choice

Which lettered graph represents the effect of carbon dioxide gas on photosynthetic rate?

• A

• B

• C

• D

Multiple Choice

Which lettered graph represents the effect of temperature on photosynthetic rate?

• A

• B

• C

• D

Multiple Choice

Which factor would not increase the production of glucose by photosynthesis in plants?

• freezing temperatures

• extra rainfall

• increased carbon dioxide levels

• increased sunlight exposure

Multiple Choice

How is the leaf adapted to do photosynthesis?

• The leaf's upper layer is thin and transparent to allow light to pass through.
• The leaf's palisade layer has the most chloroplast to absorb the maximum amount of light possible.
• The leaf's lower layer has many stomata to allow gases to diffuse.
• All of the descriptions above are true.

Multiple Choice

This diagram is a leaf cell. Which of the following refers to letter D?

• Nucleus
• Vacuole
• Chloroplast
• Cell wall

Multiple Choice

How does temperature affects photosynthesis rate?

• As temperature increases, photosynthesis rate also increases.
• As temperature decreases, photosynthesis rate also decreases.
• Plants cannot photosynthesis if the temperature is too cold or too hot. 
• All of the statements are true.

Multiple Choice

Glucose (sugar) is also produced during photosynthesis. What do plants use glucose for?

• Source of energy.
• Supports plant growth and development.
• Keeps plants warm.
• Prevents plants from dying.

Multiple Choice

What will happen to the photosynthesis rate if you increase the intensity of light?

• Photosynthesis rate will increase.
• Photosynthesis rate will decrease.
• Photosynthesis rate will remain the same.
• Photosynthesis will stop.

Multiple Choice

What is required for photosynthesis to begin?

• water and oxygen

• oxygen and carbon dioxide

• carbon dioxide and water

• chocolate and pop

Multiple Choice

What is produced during photosynthesis?

• water and carbon dioxide

• glucose and carbon dioxide

• glucose and oxygen

• apples and bananas

Multiple Choice

Which of the following are required for cellular respiration to begin?

• oxygen and glucose

• oxygen and water

• oxygen and carbon dioxide

• apples and bananas

Multiple Choice

What is produced during cellular respiration?

• oxygen and energy (ATP)

• carbon dioxide and oxygen

• carbon dioxide and energy (ATP)

• noodles

Multiple Choice

Plants undergo both photosynthesis and cellular respiration

• true

• false

Multiple Choice

Photosynthesis happens in the chloroplast

• true

• false

Multiple Choice

Cellular Respiration happens in the chloroplast

• true

• false

Multiple Choice

Cellular respiration happens in the mitochondria

• true

• false

Multiple Choice

Where do plants get the carbon needed for photosynthesis

• ground

• water

• air

• Target

Multiple Choice

The source of energy for photosynthesis is

• water

• soil

• air

• the sun

Multiple Choice

Temperature, light, air, water, and soil are all  _____  parts of the environment

• alive
• biotic 
• abiotic
• living

Multiple Choice

What is the original source of almost all energy in most ecosystems?

• carbohydrates
• sunlight
• water
• carbon

Multiple Choice

All the living things in an environment

• Biotic factors
• Traits
• Animals
• Natural Selection