Question 1

Which of the following best describes the difference between potential and kinetic energy in biological systems?

Accepted Answer

Potential energy is stored in chemical bonds, while kinetic energy is the energy of motion, such as muscle contractions.

Question 2

A glucose molecule contains energy stored in its chemical bonds. This is an example of:

Accepted Answer

Potential energy

Question 3

Which of the following is NOT a form of kinetic energy?

Accepted Answer

A glucose molecule storing energy in its bonds

Question 4

According to the first law of thermodynamics, which of the following statements is correct?

Accepted Answer

Energy cannot be created or destroyed, only transferred or transformed.

Question 5

Which of the following best explains why energy transfer in biological systems is not 100% efficient?

Accepted Answer

Some energy is lost as heat, increasing the entropy of the universe.

Question 6

Which of the following images (A: tidy room, B: messy room) best represents a system with higher entropy?

Accepted Answer

Image B

Question 7

Which of the following statements is true for all exergonic reactions?

Accepted Answer

The reaction proceeds with a net loss of free energy.

Question 8

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

Accepted Answer

ATP acts as an intermediary to store and transfer energy for cellular work.

Question 9

How does ATP participate in energy-coupling reactions?

Accepted Answer

Hydrolysis of ATP fuels endergonic reactions.

Question 10

Which of the following statements is TRUE regarding an enzyme’s function?

Accepted Answer

It increases the rate of chemical reactions by lowering activation energy barriers.

Question 11

Which of the following environmental factors can affect enzyme activity?

Accepted Answer

All of the above

Question 12

A competitive inhibitor decreases the rate of an enzyme-catalyzed reaction by:

Accepted Answer

Binding to the active site of an enzyme and inhibiting the substrate from binding.

Question 13

Which of the following types of enzyme inhibition can be overcome by increasing the substrate concentration?

Accepted Answer

Competitive inhibition

Question 14

Which of the following terms specifically describes the metabolic process of breaking down large molecules?

Accepted Answer

Catabolism

Question 15

Which of the following statements is TRUE regarding anabolic pathways?

Accepted Answer

They consume energy to build up polymers from monomers.

Question 16

Which of the following is an example of negative feedback in a metabolic pathway?

Accepted Answer

The final product of a pathway inhibits an earlier step in the same pathway.

Question 17

Which of the following best describes the effect of a noncompetitive inhibitor on an enzyme?

Accepted Answer

It binds to an allosteric site, changing the shape of the active site.

Question 18

Which of the following is TRUE about feedback inhibition?

Accepted Answer

Feedback inhibition of a pathway can only be accomplished by the products of that pathway.

Question 19

Which of the following best explains why certain bacteria can survive in hot springs?

Accepted Answer

Their enzymes have high optimal temperatures.

Question 20

Which of the following is the correct formula for the change in free energy ($$\Delta G) of a $$reaction?

Accepted Answer

$$\Delta G = G_{products} - G_{reactants}$$

Energy and Enzymes: An Introduction to Metabolism (General Biology Study Notes)

스터디 가이드 - 연습 문제