Question 1

Which process requires the coenzyme NADH?

Accepted Answer

A) Glucose → pyruvate 
B) Pyruvate → acetaldehyde 
C) Pyruvate → lactate 
D) Pyruvate → acetyl CoA 
E) More than one of the processes requires the coenzyme NADH. 
A) Glucose → pyruvate 
B) Pyruvate → acetaldehyde 
C) Pyruvate → lactate 
D) Pyruvate → acetyl CoA 
E) More than one of the processes requires the coenzyme NADH.

Question 2

The phosphorylation of mannose to form mannose 6-phosphate requires energy from ATP.

Accepted Answer

A) True 
 B)False

Question 3

A kinase enzyme catalyzes the transfer of a phosphate group from one substrate to another.

Accepted Answer

A) True 
 B)False

Question 4

In the Cori cycle,compounds are cycled ________.

Accepted Answer

A) from the muscles to the kidneys and back to the muscles 
B) from the muscles to the liver and back to the muscles 
C) from the kidneys to the liver and back to the kidneys 
D) from the liver to the brain and back to the liver 
A) from the muscles to the kidneys and back to the muscles 
B) from the muscles to the liver and back to the muscles 
C) from the kidneys to the liver and back to the kidneys 
D) from the liver to the brain and back to the liver

Question 5

The first three steps of glycolysis add three phosphate groups to glucose.

Accepted Answer

A) True 
 B)False

Question 6

Many cancerous tumors depend largely on glycolysis to supply their energy needs.

Accepted Answer

A) True 
 B)False

Question 7

Glycolysis begins with the phosphorylation of glucose to form glucose 6-phosphate.

Accepted Answer

A) True 
 B)False

Question 8

Which is not one of the three major products formed in glycolysis?

Accepted Answer

A) Glucose 
B) ATP 
C) NADH 
D) Pyruvate 
A) Glucose 
B) ATP 
C) NADH 
D) Pyruvate

Question 9

Which compound is not a ketone body?

Accepted Answer

A) Acetoacetate 
B) Acetone 
C) β-hydroxybutyrate 
D) Acetyl CoA 
A) Acetoacetate 
B) Acetone 
C) β-hydroxybutyrate 
D) Acetyl CoA

Question 10

Gluconeogenesis is simply the reverse of glycolysis.

Accepted Answer

A) True 
 B)False

Question 11

Gluconeogenesis is an anabolic process that synthesizes glucose from pyruvate.

Accepted Answer

A) True 
 B)False

Question 12

Glycolysis converts ________.

Accepted Answer

A) polysaccharides to glucose 
B) glucose to pyruvate,which is then metabolized to acetyl CoA 
C) fatty acids to thioesters,which are then metabolized to acetyl CoA 
D) amino acids to urea 
A) polysaccharides to glucose 
B) glucose to pyruvate,which is then metabolized to acetyl CoA 
C) fatty acids to thioesters,which are then metabolized to acetyl CoA 
D) amino acids to urea

Question 13

An abnormally high concentration of ketone bodies can lead to ketoacidosis-that is,an increase in the blood pH caused by the increased level of β-hydroxybutyrate and acetoacetate.

Accepted Answer

A) True 
 B)False

Question 14

Which class(es)of compounds generates pyruvate as it is metabolized to acetyl CoA?

Accepted Answer

A) Only fatty acids 
B) Only proteins 
C) Only carbohydrates 
D) Proteins and carbohydrates 
E) Fatty acids,proteins,and carbohydrates 
A) Only fatty acids 
B) Only proteins 
C) Only carbohydrates 
D) Proteins and carbohydrates 
E) Fatty acids,proteins,and carbohydrates

Question 15

What are the four reactions involved in beta-oxidation in the correct order?

Accepted Answer

A) Oxidation,hydration,cleavage,oxidation 
B) Hydration,oxidation,oxidation,cleavage 
C) Oxidation,oxidation,cleavage,hydration 
D) Oxidation,hydration,oxidation,cleavage 
A) Oxidation,hydration,cleavage,oxidation 
B) Hydration,oxidation,oxidation,cleavage 
C) Oxidation,oxidation,cleavage,hydration 
D) Oxidation,hydration,oxidation,cleavage

Question 16

β-Oxidation of a fatty acid requires how many steps to cleave a two carbon acetyl CoA unit from the starting acyl CoA?

Accepted Answer

A) 2 
B) 4 
C) 8 
D) 10 
E) The number of steps required is dependent on the identity of the starting acyl CoA. 
A) 2 
B) 4 
C) 8 
D) 10 
E) The number of steps required is dependent on the identity of the starting acyl CoA.

Question 17

Step [9] in glycolysis,shown below,involves the dehydration of 2-phosphoglycerate. What is the structure of the dehydration product?

Accepted Answer

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

Question 18

3-Phosphoglycerate and 2-phosphoglycerate,two intermediates in glycolysis,are related as stereoisomers.

Accepted Answer

A) True 
 B)False

Question 19

How much ATP results from the transformation of two (2)molecules of acetyl CoA to four (4)molecules of CO2?

Accepted Answer

A) 2 ATP molecules 
B) 5 ATP molecules 
C) 12 ATP molecules 
D) 20 ATP molecules 
E) 32 ATP molecules 
A) 2 ATP molecules 
B) 5 ATP molecules 
C) 12 ATP molecules 
D) 20 ATP molecules 
E) 32 ATP molecules

Question 20

Glycolysis occurs when the body has depleted its supplies of glucose and stored glycogen,and occurs during sustained physical exercise and fasting.

Accepted Answer

A) True 
 B)False

Exam 24: Carbohydrate,lipid,and Protein Metabolism

Which process requires the coenzyme NADH?

The phosphorylation of mannose to form mannose 6-phosphate requires energy from ATP.

A kinase enzyme catalyzes the transfer of a phosphate group from one substrate to another.

In the Cori cycle,compounds are cycled ________.

The first three steps of glycolysis add three phosphate groups to glucose.

Many cancerous tumors depend largely on glycolysis to supply their energy needs.

Glycolysis begins with the phosphorylation of glucose to form glucose 6-phosphate.

Which is not one of the three major products formed in glycolysis?

Which compound is not a ketone body?

Gluconeogenesis is simply the reverse of glycolysis.

Gluconeogenesis is an anabolic process that synthesizes glucose from pyruvate.

Glycolysis converts ________.

An abnormally high concentration of ketone bodies can lead to ketoacidosis-that is,an increase in the blood pH caused by the increased level of β-hydroxybutyrate and acetoacetate.

Which class(es)of compounds generates pyruvate as it is metabolized to acetyl CoA?

What are the four reactions involved in beta-oxidation in the correct order?

β-Oxidation of a fatty acid requires how many steps to cleave a two carbon acetyl CoA unit from the starting acyl CoA?

Step [9] in glycolysis,shown below,involves the dehydration of 2-phosphoglycerate. What is the structure of the dehydration product?

3-Phosphoglycerate and 2-phosphoglycerate,two intermediates in glycolysis,are related as stereoisomers.

How much ATP results from the transformation of two (2)molecules of acetyl CoA to four (4)molecules of CO2?

Glycolysis occurs when the body has depleted its supplies of glucose and stored glycogen,and occurs during sustained physical exercise and fasting.

Matter and Measurement

Atoms and the Periodic Table

Ionic Compounds

Covalent Compounds

Chemical Reactions

Energy Changes,reaction Rates,and Equilibrium

Gases,liquids,and Solids

Solutions

Acids and Bases

Nuclear Chemistry

Introduction to Organic Molecules and Functional Groups

Alkanes

Unsaturated Hydrocarbons

Organic Compounds That Contain Oxygen,halogen,or Sulfur

The Three-Dimensional Shape of Molecules

Aldehydes and Ketones

Carboxylic Acids,esters,and Amides

Amines and Neurotransmitters

Lipids

Carbohydrates

Amino Acids,proteins,and Enzymes

Nucleic Acids and Protein Synthesis

Metabolism and Energy Production

Filters

How much ATP results from the transformation of two (2)molecules of acetyl CoA to four (4)molecules of CO₂?