T4L2 Cellular Respiration Guided Reading

​T4L2 Guided Reading
Cellular Respiration

Mrs. Keefe - 7th Grade Science

• photosynthesis

• cellular respiration

• fermentation

• produce

• source

Vocabulary Words

1. How does cellular respiration break down food to produce energy and carbon dioxide?

2. How can cells release energy without using oxygen?

3. How are matter and energy conserved during cellular respiration?

​Guiding Questions

Cellular Respiration

• photosynthesis - the process by which plants and other autotrophs capture and use light energy to make food from carbon dioxide and water

• cellular respiration - the process in which oxygen and glucose undergo a complex series of chemical reactions inside cells, releasing energy

• fermentation - the process by which cells release energy by breaking down food molecules without using oxygen

• produce - to use a combination of materials and processes to create something new

• source - the place where something comes from; the point where something begins

Match

Match each term to it's definition.

• the process by which plants and other autotrophs capture and use light energy to make food from carbon dioxide and water

• the process in which oxygen and glucose undergo a complex series of chemical reactions inside cells, releasing energy

• the process by which cells release energy by breaking down food molecules without using oxygen

• to use a combination of materials and processes to create something new

• the place where something comes from; the point where something begins

photosynthesis

cellular respiration

fermentation

produce

source

• photosynthesis

• cellular respiration

• fermentation

• produce

• source

Draw

Figure 1 : Biking takes a lot of energy! Your body uses cellular respiration to get energy from the food you eat, such as trail mix.

Draw arrows on Figure 1 to show the flow of energy from the food into the biker, and then out into the environment as heat and motion.

Draw

Sketch on the graph to show how the biker's energy level may change over time as they start biking, stop for a snack, start biking again, and finish their ride.

Multiple Choice

The process that converts food (glucose) into energy is called

• cellular respiration

• chloroplasts

• photosynthesis

• carbon dioxide

Multiple Choice

Cellular respiration happens in...

• a few cells of living organisms

• most cells of living organisms

• all cells of living organisms

Multiple Choice

Cellular respiration is

• a chemical reaction and NOT the same as breathing

• a chemical reaction and the SAME as breathing

• not a chemical reaction

Multiple Choice

Cellular respiration is connected to photosynthesis beacuse photosynthesis makes the glucose and cellular respiration breaks the glucose.

• true

• false

Multiple Choice

Cellular Respiration's goal is to

• make water

• make energy

• make glucose

• make oxygen

Multiple Choice

What gas is released into the air during cellular respiration?

• oxygen
• carbon dioxide
• water 
• glucose

Multiple Choice

___ is needed for cellular respiration, it is absorbed from the air.

• oxygen

• glucose

• carbon dioxide

• water

Multiple Choice

___ is needed for cellular respiration, it comes from food.

• glucose

• water

• oxygen

• carbon dioxide

Multiple Choice

What two things are needed for cellular respiration to happen in a cell?

• glucose & oxygen

• water & carbon dioxide

• oxygen & carbon dioxide

• glucose & water

Multiple Choice

Both ___ are leftover as waste products after cellular respiration.

• water & carbon dioxide

• oxygen & glucose

• carbon dioxide & oxygen

• water & oxygen

Here in Figure 2, find "stage 1" where glucose is being broken down.

Then identify "stage 2" where the mitochondrion is using oxygen and breaking down the molecules from stage 1.

Labelling

Identify Stage 1 and Stage 2 on the figure shown here.

Drag labels to their correct position on the image

Stage 1

Stage 2

Multiple Choice

Which of the following is the correct formula for PHOTOSYNTHESIS?

• Carbon Dioxide + Glucose -> Water + Oxygen

• Water + Oxygen --> Carbon Dioxide + Glucose

• Water + Carbon Dioxide -> Glucose + Oxygen

• Glucose + Oxygen -> Carbon Dioxide + Water

Multiple Choice

What is the correct formula for CELLULAR RESPIRATION?

• 6CO₂ + 6H₂0 -> 6O₂ + C₆H₁₂O₆

• 6O₂ + C₆H₁₂O₆ ->6CO₂ + 6H₂0

• 6H₂0 + C₆H₁₂O₆ ->6CO₂ + 6O₂

• 6CO₂ + C₆H₁₂O₆ -> 6O₂ + 6H₂0

Multiple Choice

How many carbon atoms are in 6CO₂?

• 1

• 2

• 6

• 12

Multiple Choice

How many oxygen atoms are in 6CO₂?

• 1

• 2

• 6

• 12

Multiple Choice

What are the products in this equation?

C₆H₁₂O₆ + 6O₂ --> 6CO₂ + 6H₂O + ATP

• glucose and oxygen

• glucose and energy

• oxygen and carbon dioxide

• carbon dioxide, water, and energy

Multiple Choice

What are the reactants in this equation?

C₆H₁₂O₆ + 6O₂ --> 6CO₂ + 6H₂O + ATP

• glucose and oxygen

• glucose and energy

• oxygen and carbon dioxide

• carbon dioxide, water, and energy

Multiple Choice

Specialized structures inside of cells that perform certain jobs are known as _____,

• nucleus

• organelles

• eukaryotic

• chlorophyll

Multiple Choice

Produces the energy needed for the cell

• Vacuole

• Nucleus

• Endoplasmic Retriculum

• Mitochondria

Multiple Select

Check all of the TRUE statements regarding mitochondrion.

• A cell can have thousands of mitochondria

• A cell that needs more energy will produce less mitochondria

• A cell that needs more energy will produce more mitochondria

• A cell can only have between 10 and 20 mitochondria

• A cell is able to create more mitochondria as needed

Open Ended

Think about the job of the mitochondria. Which cells in your body would you expect to have the most mitochondria? Explain your reasoning.

Revisit this passage before labeling the description of Figure 2 on the next slide...

Dropdown

Stage 1: In the cytoplasm,​

Select answer

​ is broken down into smaller molecules, releasing a small amount of ​

Select answer

.



Stage 2: In the ​

Select answer

, the smaller molecules react, producing ​

Select answer

, water, and large amounts of energy.

Figure 3: Carbon dioxide and oxygen cycle through cellular respiration and photosynthesis.

Labelling

Label the figure shown here.

Drag labels to their correct position on the image

oxygen &
glucose

water &
co2

mitochondria

chloroplast

Open Ended

From what you've read and done so far, describe how photosynthesis and cellular respiration are OPPOSITE chemical reactions. Your response should be a complete sentence.

​	​Atoms on LEFT	Atoms on RIGHT​	Balanced?​
​Oxygen (O)	​	​	​YES or NO
Carbon (C)​	​	​	​​YES or NO
Hydrogen (H)​	​	​	​​YES or NO

Labelling

For the chemical equation of $$C_6H_{12}O_6+6O_2\ \rightarrow\ 6CO_2+6H_2O$$ identify the number of atoms for each element that are evident on the right and determine if the equation is balanced.

Drag labels to their correct position on the image

Carbon - NO

Hydrogen - YES

2

Oxygen - NO

12

Carbon - YES

Oxygen - YES

3

6

18

Dropdown

The release of energy from food

without using ​

Select answer

is called fermentation. Fermentation

is very useful in environments with limited oxygen, such as

in the ​

Select answer

. However, fermentation releases much ​

Select answer

energy than cellular respiration with oxygen.

​

Dropdown

When you start to breathe faster and exert lots of energy, your muscle cells use up ​

Select answer

faster than it can be replaced. Without enough oxygen, ​

Select answer

takes place.

Dropdown

During exercise and intense physical activity, your body needs ​

Select answer

— a substance the cells use as an energy source to meet high demands for energy.

On the next screen you will explain how fermentation that causes dough to rise is different from the fermentation that happens in muscles.

​Review both types of fermentation. ​

Match

Match each sentence start to the most correct sentence end.

• Fermentation in dough...

• Fermentation in muscles...

• Fermentation in both...

produces alcohol.

produces lactic acid.

is a release of energy without oxygen.

• produces alcohol.

• produces lactic acid.

• is a release of energy without oxygen.

Labelling

Figure 4: Your breathing and blood circulation can supply enough oxygen for cellular respiration when you exercise gently. During a sprint, your cells run low on oxygen and switch to lactic acid fermentation for energy.

For each activity, label the source of energy for the muscle cells. Is it oxygen or lactic acid?

Drag labels to their correct position on the image

standing - LACTIC ACID

jogging - LACTIC ACID

sprinting - OXYGEN

sprinting - LACTIC ACID

jogging - OXYGEN

standing - OXYGEN

Multiple Choice

How many fermentation types are there?

• 2

• 5

• 3

• 6

Multiple Choice

Which of the following is the word equation for cellular respiration?

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

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

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

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

Multiple Choice

What is the energy molecule?

• DNA
• ATP
• RNA
• AAA

Multiple Choice

Which is not a waste product of cellular respiration?

• Water
• Heat
• Carbon Dioxide
• Oxygen

Multiple Choice

Cellular Respiration's goal is to

• make water

• make energy

• make glucose

• make oxygen

Multiple Choice

The ___ is the cell part (organelle) inside cells where cellular respiration happens.

• mitochondria

• chloroplast

• nucleus

• ribosome

Multiple Choice

___ is needed for cellular respiration, it comes from food.

• glucose

• water

• oxygen

• carbon dioxide

Multiple Choice

___ is needed for cellular respiration, it is absorbed from the air.

• oxygen

• glucose

• carbon dioxide

• water

Multiple Choice

Both ___ are leftover as waste products after cellular respiration.

• water & carbon dioxide

• oxygen & glucose

• carbon dioxide & oxygen

• water & oxygen