Question 1

Which of the following best describes the primary site of carbohydrate digestion in the human body?

Accepted Answer

small intestine

Question 2

Which of the following is a direct product of glycolysis under anaerobic conditions in human muscle cells?

Accepted Answer

lactate

Question 3

During vigorous exercise, which compound accumulates in muscle cells and is responsible for muscle fatigue?

Accepted Answer

lactate

Question 4

Which process is responsible for the conversion of glucose-6-phosphate to glucose in the liver during fasting?

Accepted Answer

gluconeogenesis

Question 5

Which of the following steps in glycolysis involves substrate-level phosphorylation?

Accepted Answer

conversion of 1,3-bisphosphoglycerate to 3-phosphoglycerate

Question 6

Which enzyme catalyzes the conversion of glucose-6-phosphate to fructose-6-phosphate in glycolysis?

Accepted Answer

phosphoglucose isomerase

Question 7

How many net ATP molecules are produced per molecule of glucose during glycolysis?

Accepted Answer

$$2$$

Question 8

Which of the following processes requires GTP as an energy source?

Accepted Answer

gluconeogenesis

Question 9

Which of the following is NOT a product of the pyruvate dehydrogenase complex?

Accepted Answer

FADH$$_2$$

Question 10

Which of the following statements about the Cori cycle is correct?

Accepted Answer

It converts lactate produced in muscles to glucose in the liver.

Question 11

Which of the following glycolytic intermediates contains two phosphate groups?

Accepted Answer

fructose-1,6-bisphosphate

Question 12

Which of the following processes is responsible for the breakdown of glycogen to glucose-1-phosphate?

Accepted Answer

glycogenolysis

Question 13

Which of the following is the correct net equation for glycolysis?

Accepted Answer

$$\mathrm{Glucose} + 2\ \mathrm{NAD}^+ + 2\ \mathrm{ADP} + 2\ \mathrm{P_i} \rightarrow 2\ \mathrm{Pyruvate} + 2\ \mathrm{NADH} + 2\ \mathrm{ATP} + 2\ \mathrm{H_2O} + 2\ \mathrm{H}^+$$

Question 14

Which of the following enzymes is responsible for the phosphorylation of glucose to glucose-6-phosphate in the first step of glycolysis?

Accepted Answer

hexokinase

Question 15

Which of the following is a regulatory enzyme in glycolysis that is allosterically inhibited by ATP?

Accepted Answer

phosphofructokinase-1

Question 16

Which of the following best explains why red blood cells rely exclusively on glycolysis for ATP production?

Accepted Answer

They lack mitochondria.

Question 17

Which of the following is the correct sequence of events during the conversion of pyruvate to acetyl CoA?

Accepted Answer

Decarboxylation, oxidation, transfer to CoA

Question 18

Which of the following statements about gluconeogenesis is correct?

Accepted Answer

It is the synthesis of glucose from non-carbohydrate precursors.

Question 19

Which of the following is a fate of pyruvate under aerobic conditions in human cells?

Accepted Answer

Conversion to acetyl CoA

Question 20

Which of the following processes is responsible for the synthesis of glycogen from glucose?

Accepted Answer

glycogenesis

Chapter 24

Guida di studio - Domande di pratica

Study guide - Flashcard