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

Question 1

Which bond in the ATP molecule, when broken, releases the most energy for cellular activities?

Accepted Answer

The bond between the second and third phosphate group

Question 2

What is the primary reason glucose stores a large amount of energy?

Accepted Answer

It contains many high-energy covalent bonds between carbon and hydrogen atoms

Question 3

Which of the following best describes the process of energy coupling in cells?

Accepted Answer

Using the energy released from an exergonic reaction to drive an endergonic reaction

Question 4

During the hydrolysis of ATP, which of the following occurs?

Accepted Answer

ATP is converted to ADP and inorganic phosphate, releasing energy

Question 5

Which of the following equations correctly represents the hydrolysis of ATP?

Accepted Answer

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

Question 6

In a redox reaction, which statement is true?

Accepted Answer

The atom that loses electrons is oxidized, and the atom that gains electrons is reduced

Question 7

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

Accepted Answer

ATP can be regenerated from ADP and inorganic phosphate using energy from glucose breakdown

Question 8

Which of the following is an example of an exergonic reaction in cells?

Accepted Answer

Hydrolysis of ATP to ADP and inorganic phosphate

Question 9

When glucose is broken down in cells, what happens to the electrons in its covalent bonds?

Accepted Answer

They are transferred to electron carrier molecules such as NAD$$^+$$ and FAD

Question 10

Which of the following statements about redox reactions is correct?

Accepted Answer

Reduction is the gain of electrons, and oxidation is the loss of electrons

Question 11

In the breakdown of glucose, which molecule is reduced and which is oxidized?

Accepted Answer

Oxygen is reduced, and carbon in glucose is oxidized

Question 12

Which of the following best describes the role of electron carriers such as NAD$$^+$$ and FAD in cellular respiration?

Accepted Answer

They temporarily accept and transport electrons released during glucose breakdown

Question 13

A scientist measures the free energy change ($$\Delta G) of a $$reaction and finds it to be negative. What does this indicate about the reaction?

Accepted Answer

The reaction is exergonic and releases energy

Question 14

Which of the following best explains why the hydrolysis of ATP is highly exergonic?

Accepted Answer

The repulsion between negatively charged phosphate groups is relieved when the terminal phosphate is removed

Question 15

If a cell needs to drive an endergonic reaction, which of the following strategies would it most likely use?

Accepted Answer

Couple the endergonic reaction with the hydrolysis of ATP

Question 16

Which of the following is true about the energy stored in glucose?

Accepted Answer

It is stored in the high-energy covalent bonds between carbon and hydrogen atoms

Question 17

During aerobic respiration, what is the final electron acceptor in the electron transport chain?

Accepted Answer

Oxygen

Question 18

Which of the following best describes the relationship between exergonic and endergonic reactions in cells?

Accepted Answer

Exergonic reactions provide the energy required to drive endergonic reactions

Question 19

A patient is unable to efficiently break down glucose in their cells. Which of the following would most likely be observed as a result?

Accepted Answer

Decreased ATP production

Question 20

Which of the following statements about the transfer of electrons in redox reactions is correct?

Accepted Answer

Electrons are transferred from the oxidized molecule to the reduced molecule

Energy Coupling, ATP, and Redox Reactions in Cellular Metabolism

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