WorksheetsPhotosynthesis and Plant Nutrition
Total questions: 20
Worksheet time: 15mins
Where in a plant cell does photosynthesis take place
Palisade cells
Chlorophyll
Chloroplasts
Vacuole
What is the purpose of photosynthesis?
To release energy
To create glucose
To grow
To get oxygen for respiration
Which of these are limiting factors for photosynthesis? Choose 3 answers.
Light intensity
CO2 concentration
Temperature
Light
CO2 levels
Which tissue in a leaf does the majority of photosynthesis?
Upper epidermis
Spongy mesophyll
Palisade mesophyll
Stomata
Which of these are suitable ways to measure the rate of photosynthesis? Choose 2 answers.
Measure amount of carbon dioxide produced
Measure amount of oxygen produced
Measure pH change
Check for starch with iodine
What wavelengths of light does chlorophyll absorb?
Green
All visible light
Red and Blue light
It reflects all light
What is limiting the rate of photosynthesis at point A?
CO2 concentration
Nothing
Light intensity
Number of chloroplasts
What is limiting the rate of photosynthesis at point B?
CO2 concentration or Temperature
Nothing
Light intensity
Leaf size
Which factors must be kept constant when investigating the effect of light intensity on photosynthesis? Choose 3 answers.
Size of pond weed
Species of pond weed
Light intensity
Temperature
Volume of water in tube
Which mineral ion is needed by a plant in order to build chlorophyll?
Calcium
Nitrates
Magnesium
Phosphorous
Which of these is the correct equation for photosynthesis?
6O2 + C6H12O6 --> 6CO2 + 6H2O
6O2 + 6CO2 --> C6H12O6 + 6H2O
6CO2 + 6H2O --> 6O2 + C6H12O6
6CO2 + 6H2O --> O2 + C6H12O6
What are the products of photosynthesis?
Oxygen and Energy
Carbon Dioxide and Glucose
Glucose and Oxygen
Oxygen and Water
When testing a leaf for starch why is it necessary to boil it in ethanol first?
To break open the plant cells
To release the starch form the cells
To kill the plant cells
To remove the green chlorophyll from the leaf
A student wanted to see if covering a leaf in foil would stop it from producing starch. Why should the student put the plant in a dark cupboard for 48 hours before returning it to the light and starting the experiment?
To make the results reliable
So that the plant would photosynthesise faster when returned to the light
So that any starch already in the leaf was used up by the plant
What does a plant need in order to photosynthesise? Choose 3 answers.
Carbon Dioxide
Nutrients
Light
Water
Glucose
Plants are the only kingdom of organisms to do photosynthesis.
True
False
Why might photosynthesis slow down or stop at high temperatures? Choose 2 answers.
Enzymes denature
Chlorophyll denatures
The plant wilts
Stomata close so no CO2 can enter the leaf
Why does hydrogen carbonate indicator change colour if a photosynthesising plant is present? Choose 2 answers.
O2 is produced by the plant
CO2 is absorbed by the plant
Higher dissolved O2 lowers the pH
Lower dissolved CO2 levels raises the pH
Lower dissolved CO2 levels lowers the pH
Why does a plant need nitrates from the soil? Choose the best answer.
To make glucose
To make amino acids
For growth
Because it is a mineral
Pond weed is placed in hydrogen carbonate indicator. After 60 minutes the indicator colour has not changed. Why?
No photosynthesis is occurring
It is night time
The rates of respiration and photosynthesis are equal
The indicator is already saturated with CO2
