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

$$\mathrm{ATP} \rightarrow \mathrm{ADP} + \mathrm{Pi} + \text{energy}$$

Question 1

Which of the following best describes the difference between linear and cyclic metabolic pathways?

Accepted Answer

Linear pathways involve a series of reactions where the product of one reaction becomes the substrate for the next, while cyclic pathways repeat a series of reactions with the same basic chemical cycle.

Question 2

Which of the following is an example of an anabolic pathway?

Accepted Answer

Assembly of proteins from amino acids

Question 3

During glycolysis, what is the net gain of ATP molecules per molecule of glucose?

Accepted Answer

$$2$$

Question 4

Which coenzyme is reduced during glycolysis, and what does it become?

Accepted Answer

NAD$$^+ is $$reduced to NADH

Question 5

What is the primary immediate source of energy for cellular activities?

Accepted Answer

ATP

Question 6

Which of the following best describes the role of coenzymes in metabolic pathways?

Accepted Answer

They assist enzymes by transferring molecules or electrons during reactions.

Question 7

In the preparatory step of cellular respiration, what happens to each pyruvate molecule?

Accepted Answer

It is converted into a 2-carbon acetyl group, carbon dioxide, and NADH.

Question 8

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

Accepted Answer

$$\mathrm{ATP} ightarrow \mathrm{ADP} + \mathrm{Pi} + 	ext{energy}$$

Question 9

If oxygen is not present in the cell, what happens to the pyruvate produced during glycolysis?

Accepted Answer

It is converted into lactate or ethanol, depending on the organism.

Question 10

Which step(s) of cellular respiration occur in the mitochondria?

Accepted Answer

Preparatory step, citric acid cycle, and electron transport system

Question 11

How many NADH molecules are produced from one glucose molecule during glycolysis?

Accepted Answer

$$2$$

Question 12

Which of the following statements about enzymes in metabolic pathways is correct?

Accepted Answer

Enzymes are specific to each reaction and can be reused multiple times.

Question 13

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

Accepted Answer

Oxygen

Question 14

What is the main waste product produced during the preparatory step of cellular respiration?

Accepted Answer

Carbon dioxide

Question 15

Which of the following best explains why cells prefer to use glucose as their primary energy source?

Accepted Answer

Glucose is readily available from food and can be quickly metabolized to produce ATP.

Question 16

Which of the following is true regarding the energy investment and energy yielding steps of glycolysis?

Accepted Answer

The energy investment step uses 2 ATP, while the energy yielding step produces 4 ATP.

Question 17

Which of the following best describes substrate-level phosphorylation?

Accepted Answer

ATP is produced directly by transferring a phosphate group from a substrate to ADP.

Question 18

What is the fate of the acetyl group formed during the preparatory step?

Accepted Answer

It is picked up by coenzyme A to form acetyl CoA and enters the citric acid cycle.

Question 19

Which of the following statements about catabolic reactions is correct?

Accepted Answer

Catabolic reactions break down molecules and release energy.

Question 20

A patient is unable to produce NAD$$^+ in $$their cells. Which stage of cellular respiration would be directly affected first?

Accepted Answer

Glycolysis

Metabolic Pathways and Cellular Respiration: Glycolysis and the Preparatory Step

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