Question 1

Which of the following reactions represents a step in the metabolism of pyruvate that occurs under aerobic conditions?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)    C

Question 2

A blood sugar level that is lower than normal is referred to as _____ .

Accepted Answer

A) hypoglycemia 
B) hyperglycemia 
C) glucosuria 
D) diabetes mellitus 
A) hypoglycemia 
B) hyperglycemia 
C) glucosuria 
D) diabetes mellitus A

Question 3

The direct fuel of the citric acid cycle is _____ .

Accepted Answer

A) glucose 
B) glycogen 
C) fatty acids 
D) acetyl CoA 
A) glucose 
B) glycogen 
C) fatty acids 
D) acetyl CoA D

Question 4

The bulk of the energy utilized by marathon runners is provided by _____ .

Accepted Answer

A) blood glucose 
B) glycogen 
C) protein 
D) fatty acids 
A) blood glucose 
B) glycogen 
C) protein 
D) fatty acids

Question 5

All of the members of the citric acid cycle are acids.

Accepted Answer

A) True 
 B)False

Question 6

Synthesis of glucose from pyruvate during the Cori cycle occurs primarily in the _____ .

Accepted Answer

A) muscles 
B) liver 
C) bloodstream 
D) heart tissue 
A) muscles 
B) liver 
C) bloodstream 
D) heart tissue

Question 7

Consider the diagram below.  That is the step that is labeled 1 called?

Accepted Answer

A) fermentation 
B) gluconeogenesis 
C) glycolysis 
D) glycogenolysis 
A) fermentation 
B) gluconeogenesis 
C) glycolysis 
D) glycogenolysis

Question 8

Glycogenolysis does not occur in muscle tissue because of the absence of the enzyme _____ .

Accepted Answer

A) glucose 6-phosphatase 
B) glycogen phosphorylase 
C) phosphoglucomutase 
D) pyruvate kinase 
A) glucose 6-phosphatase 
B) glycogen phosphorylase 
C) phosphoglucomutase 
D) pyruvate kinase

Question 9

Both glucagon and insulin are produced by the pancreas.

Accepted Answer

A) True 
 B)False

Question 10

Glycolysis is a metabolic pathway that is self-regulating.

Accepted Answer

A) True 
 B)False

Question 11

? Identify a true statement of the citric acid cycle.

Accepted Answer

A) It involves the oxidation of glucose to form pyruvate. 
B) It involves the conversion of lactate to glucose. 
C) It involves the conversion of glucose to ethanol. 
D) It involves the oxidation of CoA to form CO S1U1B12 S1U1B0, FADHS1U1B12 S1U1B0, and NADH. 
A) It involves the oxidation of glucose to form pyruvate. 
B) It involves the conversion of lactate to glucose. 
C) It involves the conversion of glucose to ethanol. 
D) It involves the oxidation of CoA to form CO S1U1B12 S1U1B0, FADHS1U1B12 S1U1B0, and NADH.

Question 12

Glycogen is a polymer of glucose that is a store of energy, and is found in the liver.

Accepted Answer

A) True 
 B)False

Question 13

The electrons and hydrogen ions carried from the citric acid cycle by FADH2 and NADH ultimately end up in the following reaction which occurs in the matrix of the mitochondria.

Accepted Answer

A) True 
 B)False

Question 14

Glycogenolysis can be correctly represented by which of the following _____ .

Accepted Answer

A) glucose → glycogen 
B) glycogen → glucose 
C) pyruvate → glycogen 
D) glycogen → pyruvate 
A) glucose → glycogen 
B) glycogen → glucose 
C) pyruvate → glycogen 
D) glycogen → pyruvate

Question 15

What ions present in the cytochrome aid in passing electrons along the electron transport chain?

Accepted Answer

A) Fe2+ and Fe3+ 
B) Cu+ and Cu2+ 
C) Zn+ and Zn2+ 
D) Mg2+ and Na+ 
A) Fe2+ and Fe3+ 
B) Cu+ and Cu2+ 
C) Zn+ and Zn2+ 
D) Mg2+ and Na+

Question 16

Glucagon can counteract the effect of insulin.

Accepted Answer

A) True 
 B)False

Question 17

The only way to prevent lactate accumulation in adults is to limit exercise.

Accepted Answer

A) True 
 B)False

Question 18

Glucose is the only sugar used by the human body.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following is not an energy source used in metabolism?

Accepted Answer

A) UTP 
B) ATP 
C) GTP 
D) UTC 
A) UTP 
B) ATP 
C) GTP 
D) UTC

Question 20

If a glucose tolerance test shows an abnormally high level of glucose in the blood after several hours, the person is possibly _____ .

Accepted Answer

A) hypoglycemic 
B) diabetic 
C) anemic 
D) overweight 
A) hypoglycemic 
B) diabetic 
C) anemic 
D) overweight

Exam 23: Carbohydrate Metabolism

Which of the following reactions represents a step in the metabolism of pyruvate that occurs under aerobic conditions?

A blood sugar level that is lower than normal is referred to as _____ .

The direct fuel of the citric acid cycle is _____ .

The bulk of the energy utilized by marathon runners is provided by _____ .

All of the members of the citric acid cycle are acids.

Synthesis of glucose from pyruvate during the Cori cycle occurs primarily in the _____ .

Consider the diagram below. That is the step that is labeled 1 called?

Glycogenolysis does not occur in muscle tissue because of the absence of the enzyme _____ .

Both glucagon and insulin are produced by the pancreas.

Glycolysis is a metabolic pathway that is self-regulating.

? Identify a true statement of the citric acid cycle.

Glycogen is a polymer of glucose that is a store of energy, and is found in the liver.

The electrons and hydrogen ions carried from the citric acid cycle by FADH2 and NADH ultimately end up in the following reaction which occurs in the matrix of the mitochondria.

Glycogenolysis can be correctly represented by which of the following _____ .

What ions present in the cytochrome aid in passing electrons along the electron transport chain?

Glucagon can counteract the effect of insulin.

The only way to prevent lactate accumulation in adults is to limit exercise.

Glucose is the only sugar used by the human body.

Which of the following is not an energy source used in metabolism?

If a glucose tolerance test shows an abnormally high level of glucose in the blood after several hours, the person is possibly _____ .

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The electrons and hydrogen ions carried from the citric acid cycle by FADH₂ and NADH ultimately end up in the following reaction which occurs in the matrix of the mitochondria.