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Cellular Respiration Quiz

Total questions: 43

Worksheet time: 24mins

Name
Class
Date
1.

Which of the following is the main goal of cellular respiration?

a)

To produce oxygen

b)

To break down glucose and produce ATP

c)

To create proteins

d)

To store fat

2.

Where does the majority of cellular respiration take place in eukaryotic cells?

a)

Nucleus

b)

Mitochondria

c)

Cytoplasm

d)

Ribosome

3.

Which of the following is NOT a step of cellular respiration?

a)

Glycolysis

b)

Krebs cycle

c)

Calvin cycle

d)

Electron transport chain

4.

Which process occurs in the absence of oxygen?

a)

Aerobic respiration

b)

Anaerobic respiration

c)

Photosynthesis

d)

Protein synthesis

5.

What is the main product of lactic acid fermentation in muscle cells?

a)

Ethanol

b)

Lactic acid

c)

Oxygen

d)

Glucose

6.

Which of the following is a product of ethanol fermentation?

a)

Lactic acid

b)

Ethanol

c)

Oxygen

d)

Water

7.

Which of the following best describes the difference between aerobic and anaerobic respiration?

a)

Aerobic uses oxygen, anaerobic does not

b)

Anaerobic uses oxygen, aerobic does not

c)

Both use oxygen

d)

Neither uses oxygen

8.

Which step of cellular respiration occurs in the cytoplasm?

a)

Glycolysis

b)

Krebs cycle

c)

Electron transport chain

d)

Fermentation

9.

Why do muscles switch to lactic acid fermentation during intense exercise?

a)

To produce more oxygen

b)

Because oxygen is not available fast enough

c)

To store more glucose

d)

To make more proteins

10.

Which of the following foods is most likely produced using ethanol fermentation?

a)

Yogurt

b)

Bread

c)

Cheese

d)

Pickles

11.

How does the mitochondria contribute to ATP production?

a)

It stores glucose

b)

It is the site of the electron transport chain, which produces most ATP

c)

It breaks down proteins

d)

It creates lactic acid

12.

If a cell is deprived of oxygen, which pathway will it most likely use to continue producing ATP?

a)

Aerobic respiration

b)

Anaerobic fermentation

c)

Photosynthesis

d)

Protein synthesis

13.

A student claims that all organisms use the same pathway to break down glucose. Based on your knowledge, how would you respond?

a)

Agree, because all organisms are the same

b)

Disagree, because some use aerobic and others use anaerobic pathways depending on oxygen availability

c)

Agree, because only aerobic respiration exists

d)

Disagree, because only plants use cellular respiration

14.

Imagine a scenario where yeast is placed in an environment without oxygen. Predict what will happen and explain why.

a)

Yeast will stop producing ATP because it cannot survive

b)

Yeast will switch to ethanol fermentation to continue producing ATP

c)

Yeast will start photosynthesis

d)

Yeast will produce lactic acid

15.

A runner experiences muscle fatigue after a sprint. Using your understanding of cellular respiration, explain the likely cause.

a)

The muscles ran out of glucose

b)

The muscles switched to lactic acid fermentation due to lack of oxygen, causing lactic acid buildup

c)

The muscles produced too much ATP

d)

The muscles stopped cellular respiration

16.

Which molecule is the final electron acceptor in the electron transport chain during cellular respiration?

a)

Carbon dioxide

b)

Oxygen

c)

Glucose

d)

NADH

17.

Where does glycolysis take place in the cell?

a)

Mitochondrial matrix

b)

Cytoplasm

c)

Inner mitochondrial membrane

d)

Nucleus

18.

Which of the following is an electron carrier involved in cellular respiration?

a)

ATP

b)

NADH

c)

Glucose

d)

Oxygen

19.

What is the main purpose of phosphorylation in cellular respiration?

a)

To break down glucose

b)

To add a phosphate group to a molecule

c)

To remove electrons from oxygen

d)

To transport carbon dioxide

20.

Which step of cellular respiration produces the most ATP?

a)

Glycolysis

b)

Krebs cycle

c)

Electron transport chain and oxidative phosphorylation

d)

Fermentation

21.

Compare the function of ATP synthase to a water turbine. What is the similarity in how both generate energy?

a)

Both use light to generate energy

b)

Both use the flow of particles to turn a rotor and produce energy

c)

Both break down glucose directly

d)

Both require oxygen to function

22.

Which process occurs in the mitochondrial matrix and produces carbon dioxide as a byproduct?

a)

Glycolysis

b)

Krebs cycle

c)

Electron transport chain

d)

Fermentation

23.

How does the flow of hydrogen ions (protons) across the inner mitochondrial membrane contribute to ATP production?

a)

It directly forms glucose

b)

It powers ATP synthase to regenerate ATP from ADP and phosphate

c)

It breaks down NADH

d)

It removes carbon dioxide from the cell

24.

Given that glycolysis produces a net gain of 2 ATP molecules per glucose, and the electron transport chain produces the most ATP, explain why the electron transport chain is considered the most efficient step for ATP production.

a)

It uses more glucose

b)

It produces ATP by substrate-level phosphorylation only

c)

It uses the energy from electrons carried by NADH and FADH 2_2 to generate a large proton gradient, resulting in the synthesis of many ATP molecules via oxidative phosphorylation

d)

It does not require oxygen

25.

Which organelle is responsible for photosynthesis in plant cells?

a)

Mitochondria

b)

Chloroplast

c)

Nucleus

d)

Ribosome

26.

What is the main function of cellular respiration?

a)

To produce glucose

b)

To release energy from food

c)

To store energy in ATP

d)

To absorb sunlight

27.

Which gas is used during photosynthesis?

a)

Oxygen

b)

Carbon dioxide

c)

Nitrogen

d)

Hydrogen

28.

What is the energy source for photosynthesis?

a)

Chemical energy

b)

Sunlight

c)

Heat

d)

ATP

29.

Which process adds oxygen to the atmosphere?

a)

Cellular respiration

b)

Photosynthesis

c)

Fermentation

d)

Digestion

30.

Which of the following is the correct formula for photosynthesis?

a)

C6H12O6+6O2→6CO2+6H2O+energyC_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O + \text{energy}

b)

6CO2+6H2O+light energy→C6H12O6+6O26CO_2 + 6H_2O + \text{light energy} \rightarrow C_6H_{12}O_6 + 6O_2

c)

C6H12O6→2C2H5OH+2CO2C_6H_{12}O_6 \rightarrow 2C_2H_5OH + 2CO_2

d)

6O2+6H2O→6CO2+C6H12O66O_2 + 6H_2O \rightarrow 6CO_2 + C_6H_{12}O_6

31.

Which process is considered catabolic?

a)

Photosynthesis

b)

Cellular respiration

c)

Protein synthesis

d)

DNA replication

32.

Which of the following best describes the role of CO 2_2 in cellular respiration?

a)

It is a reactant

b)

It is a product

c)

It is an energy source

d)

It is not involved

33.

Which organelle is responsible for cellular respiration in eukaryotic cells?

a)

Chloroplast

b)

Mitochondria

c)

Nucleus

d)

Golgi apparatus

34.

Compare the reactants of photosynthesis and cellular respiration. Which statement is correct?

a)

Both use glucose as a reactant

b)

Photosynthesis uses CO 2_2 and H 2_2 O; respiration uses glucose and O 2_2

c)

Both use O 2_2 as a reactant

d)

Respiration uses CO 2_2 and H 2_2 O; photosynthesis uses glucose and O 2_2

35.

How does energy transformation differ between photosynthesis and cellular respiration?

a)

Both store energy in glucose

b)

Photosynthesis stores energy; respiration releases energy

c)

Both release energy from glucose

d)

Respiration stores energy; photosynthesis releases energy

36.

Which process removes CO 2_2 from the atmosphere?

a)

Cellular respiration

b)

Photosynthesis

c)

Fermentation

d)

Digestion

37.

Given the equation for cellular respiration: C6H12O6+6O2→6CO2+6H2O+energyC_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O + \text{energy} , identify the products.

a)

Glucose and oxygen

b)

Carbon dioxide, water, and energy

c)

Water and glucose

d)

Oxygen and carbon dioxide

38.

Explain why photosynthesis is considered an anabolic process while cellular respiration is catabolic.

a)

Photosynthesis breaks down molecules; respiration builds them

b)

Photosynthesis builds glucose from smaller molecules; respiration breaks down glucose to release energy

c)

Both build molecules

d)

Both break down molecules

39.

A plant is placed in a sealed container with only sunlight and water. Predict what will happen to the levels of CO 2_2 and O 2_2 in the container over time and explain your reasoning.

a)

CO 2_2 will increase, O 2_2 will decrease because the plant respires

b)

CO 2_2 will decrease, O 2_2 will increase because the plant photosynthesizes

c)

Both gases will remain unchanged

d)

CO 2_2 and O 2_2 will both decrease

40.

Label the diagram

a)carbon dioxide
b)water
c)oxygen
d)glucose
e)chloroplast
f)mitochondria
1
2
3
4
5
6
1)
2)
3)
4)
5)
6)
41.

The Krebs cycle takes place in the ​ (a)   of a cell?

Choose from the below words
Mitochondrial matrix
Mitochondrial membrane
Cytoplasm
Chloroplast
42.

Label the image with the inputs & outputs:

a)

Glucose (C6H12O6)

b)

Oxygen (O2)

c)

Carbon Dioxide (CO2)

d)ATP
1
2
3
4
1)
2)
3)
4)
43.

Aerobic processes ​ (a)   .

Anaerobic processes ​ (b)   .

Choose from the below words
require oxygen
don't require oxygen
require water
don't require water
require carbon dioxide
don't require carbon dioxide

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