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 groups

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

During a redox reaction, which of the following statements is correct?

Accepted Answer

The atom that gains electrons is reduced

Question 4

Cells perform endergonic reactions by coupling them with which of the following?

Accepted Answer

The hydrolysis of ATP

Question 5

Which of the following best describes the process of ATP hydrolysis?

Accepted Answer

ATP + H2O \rightarrow ADP + Pi + energy

Question 6

In the breakdown of glucose during cellular respiration, what happens to the electrons from glucose?

Accepted Answer

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

Question 7

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

Accepted Answer

The hydrolysis of ATP to ADP and Pi

Question 8

If a reaction has a negative $$\Delta G$$, what does this indicate about the reaction?

Accepted Answer

The reaction is exergonic and releases energy

Question 9

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

Accepted Answer

ATP can be converted to ADP and then re-formed from ADP using energy from glucose breakdown

Question 10

In a redox reaction, if compound A is oxidized and compound B is reduced, what happens to the electrons?

Accepted Answer

Electrons are transferred from A to B

Question 11

Which of the following statements about the bonds in glucose and CO2 is correct?

Accepted Answer

Glucose contains high-energy covalent bonds, while CO2 contains low-energy bonds

Question 12

Which of the following best describes the role of oxygen in cellular respiration?

Accepted Answer

Oxygen is reduced as it gains electrons at the end of the electron transport chain

Question 13

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

Accepted Answer

The reaction is endergonic and requires an input of energy

Question 14

Which of the following is a correct description of energy coupling in cells?

Accepted Answer

Energy released from an exergonic reaction is used to drive an endergonic reaction

Question 15

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

Accepted Answer

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

Question 16

In the context of redox reactions, which of the following is true?

Accepted Answer

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

Question 17

Which of the following scenarios best illustrates the concept of energy coupling in a living cell?

Accepted Answer

Using the energy released from ATP hydrolysis to power the active transport of ions across a membrane

Question 18

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 19

Which of the following best describes what happens to carbon and hydrogen atoms in glucose during cellular respiration?

Accepted Answer

They are oxidized as electrons are transferred away from them

Question 20

A patient is unable to efficiently break down glucose in their cells. Which of the following processes would be most directly affected?

Accepted Answer

ATP production

4.1 Energy Coupling, ATP, and Redox Reactions in Cellular Metabolism

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