Photosynthesis, Respiration and Nutrition in Plants 

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21. Which of the following options best describes the role of ATP in cellular respiration?

a) ATP is consumed during the process of respiration.

b) ATP is synthesized during the process of respiration.

c) ATP is neither consumed nor synthesized during respiration.

d) ATP is broken down and recycled during respiration.

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22. The final product of glycolysis is:

a) Pyruvate

b) ATP

c) Carbon dioxide

d) Acetyl CoA

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23. The citric acid cycle occurs in the:

a) Cytoplasm

b) Nucleus

c) Endoplasmic reticulum

d) Mitochondria

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24. During oxidative phosphorylation, ATP is produced by the:

a) Conversion of ADP to ATP

b) Hydrolysis of ATP to ADP

c) Transfer of electrons along the electron transport chain

d) Breakdown of glucose to pyruvate

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25. The breakdown of one molecule of glucose during respiration results in the production of approximately:

a) 2 ATP molecules

b) 8 ATP molecules

c) 30 ATP molecules

d) 38 ATP molecules

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