Question 1

Which of the following best describes the difference between anabolic and catabolic pathways in cellular metabolism?

Accepted Answer

Anabolic pathways build complex molecules from simpler ones, requiring energy input, while catabolic pathways break down complex molecules into simpler ones, releasing energy.

Question 2

According to the first law of thermodynamics, which equation correctly represents the conservation of energy in a closed system?

Accepted Answer

$$\Delta E = q + w$$

Question 3

A cell increases in complexity as it grows, decreasing its internal entropy. How does this relate to the second law of thermodynamics?

Accepted Answer

Cells increase entropy in their environment more than they decrease it internally, thus obeying the second law.

Question 4

Which of the following statements about exergonic reactions is correct?

Accepted Answer

Exergonic reactions proceed with a net release of free energy.

Question 5

In the provided reaction energy diagram, which label (a, b, c, d, or e) represents the activation energy of the uncatalyzed reaction?

Accepted Answer

b

Question 6

Which equation represents the change in free energy for a reaction?

Accepted Answer

$$\Delta G = \Delta H - T\Delta S$$

Question 7

Which of the following is true about enzyme-catalyzed reactions?

Accepted Answer

Enzymes speed up reactions by lowering the activation energy.

Question 8

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

Accepted Answer

ATP stores energy in the bonds between its phosphate groups.

Question 9

Which of the following statements about competitive and noncompetitive enzyme inhibitors is correct?

Accepted Answer

Competitive inhibitors bind to the active site, while noncompetitive inhibitors bind elsewhere on the enzyme.

Question 10

During glycolysis, what is the net gain of ATP molecules produced from one glucose molecule?

Accepted Answer

2

Question 11

Which process in cellular respiration is directly responsible for the majority of ATP production?

Accepted Answer

Oxidative phosphorylation

Question 12

Which molecule acts as the final electron acceptor in the electron transport chain during aerobic respiration?

Accepted Answer

O$$_2$$

Question 13

Which of the following is a product of the Citric Acid Cycle for each glucose molecule?

Accepted Answer

4 CO$$_2$$

Question 14

Which of the following statements about fermentation is correct?

Accepted Answer

Fermentation regenerates NAD$$^+ so $$glycolysis can continue.

Question 15

Which of the following best describes chemiosmosis?

Accepted Answer

The movement of hydrogen ions down their concentration gradient through ATP synthase, resulting in ATP production.

Question 16

If a yeast cell undergoes fermentation and uses 100 molecules of glucose, how many molecules of ATP will be generated?

Accepted Answer

200

Question 17

Which of the following is common to both fermentation and cellular respiration?

Accepted Answer

Glycolysis

Question 18

Which of the following statements about the fate of carbon during cellular respiration is correct?

Accepted Answer

All carbon atoms from glucose are released as CO$$_2.$$

Question 19

Which of the following best describes the purpose of O$$_2 in $$cellular respiration?

Accepted Answer

O$$_2$$ acts as the final electron acceptor, forming water.

Question 20

Which of the following statements about substrate-level phosphorylation is correct?

Accepted Answer

It accounts for 100% of ATP formed during glycolysis.

Study Guidance for Enzyme-Catalyzed and Noncatalyzed Reactions (Energy Diagrams)

Guida di studio - Domande di pratica

Study guide - Flashcard