$$ \mathrm{ATP} + \mathrm{H}_2\mathrm{O} \rightarrow \mathrm{ADP} + \mathrm{P}_i + \text{energy} $$

Question 1

Which of the following best describes the role of ATP in cellular metabolism?

Accepted Answer

ATP serves as the primary energy currency, transferring energy to drive cellular work.

Question 2

During cellular respiration, which organelle is primarily responsible for ATP production?

Accepted Answer

Mitochondrion

Question 3

Which equation correctly represents the hydrolysis of ATP?

Accepted Answer

$$ \mathrm{ATP} + \mathrm{H}_2\mathrm{O} ightarrow \mathrm{ADP} + \mathrm{P}_i + 	ext{energy} $$

Question 4

Which statement about redox reactions is correct?

Accepted Answer

Oxidation is the loss of electrons, while reduction is the gain of electrons.

Question 5

In the electron transport chain, electrons are transferred from NADH to oxygen. What is the role of oxygen in this process?

Accepted Answer

Oxygen acts as the final electron acceptor.

Question 6

Which of the following best explains why ATP is considered a 'rechargeable battery' in cells?

Accepted Answer

ATP can be broken down and rebuilt from ADP and $$ \mathrm{P}_i $$ repeatedly.

Question 7

Which process directly couples the exergonic hydrolysis of ATP to an endergonic cellular reaction?

Accepted Answer

Protein phosphorylation

Question 8

A molecule that loses electrons during a redox reaction is called:

Accepted Answer

An oxidizing agent

Question 9

Which of the following is a correct statement about the movement of electrons and protons in cellular respiration?

Accepted Answer

Electrons and protons are often transferred together as hydrogen atoms.

Question 10

Which of the following reactions is an example of reduction?

Accepted Answer

$$ \mathrm{NAD}^+ + 2\mathrm{e}^- + 2\mathrm{H}^+ \rightarrow \mathrm{NADH} + \mathrm{H}^+ $$

Question 11

Which statement best describes the coupling of exergonic and endergonic reactions in cells?

Accepted Answer

Energy released from exergonic reactions is used to drive endergonic reactions.

Question 12

Which of the following is NOT a key pathway of cellular respiration?

Accepted Answer

Photosynthesis

Question 13

If a molecule gains hydrogen atoms during a reaction, what has occurred?

Accepted Answer

Reduction

Question 14

Which of the following best explains why electrons represent energy in biological systems?

Accepted Answer

Electrons have potential energy that can be harnessed during transfer.

Question 15

What is the main function of the mitochondria in eukaryotic cells?

Accepted Answer

Energy production through cellular respiration

Question 16

Which of the following statements about protein phosphorylation is correct?

Accepted Answer

Addition of a phosphate group can activate or change the function of a protein.

Question 17

During glycolysis, glucose is converted into which molecule?

Accepted Answer

Pyruvate

Question 18

Which of the following is true about the electron transport chain?

Accepted Answer

It generates a proton gradient used to produce ATP.

Question 19

A molecule that donates electrons in a redox reaction is called:

Accepted Answer

A reducing agent

Question 20

Which of the following is a correct summary of the overall reaction for aerobic cellular respiration?

Accepted Answer

$$ \mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6 + 6\mathrm{O}_2 ightarrow 6\mathrm{CO}_2 + 6\mathrm{H}_2\mathrm{O} + 	ext{energy} $$

ATP and Redox Reactions in Cellular Respiration

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