Question 1

In the diagram of the citric acid cycle shown,what do the two points indicated by an asterisk have in common?

Accepted Answer

A) CO2 is produced. 
B) NAD+ is reduced. 
C) ATP is produced. 
D) All will occur. 
A) CO2 is produced. 
B) NAD+ is reduced. 
C) ATP is produced. 
D) All will occur. D

Question 2

Glycolysis

Accepted Answer

A) costs two ATP molecules at the beginning of the process. 
B) produces four ATP molecules. 
C) has a resultant molecule that enters the next step of the process,the citric acid cycle. 
D) More than one response is correct. 
A) costs two ATP molecules at the beginning of the process. 
B) produces four ATP molecules. 
C) has a resultant molecule that enters the next step of the process,the citric acid cycle. 
D) More than one response is correct. D

Question 3

Each turn of the citric acid cycle produces ____ NADH coenzyme(s).

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 3 
A) 0 
B) 1 
C) 2 
D) 3 D

Question 4

Glycolysis occurs within the _____ .

Accepted Answer

A) mitochondria 
B) nucleus 
C) vacuoles 
D) cytoplasm 
A) mitochondria 
B) nucleus 
C) vacuoles 
D) cytoplasm

Question 5

Lactate,produced in the muscles,is sent to the liver for processing.This is one step of ____.

Accepted Answer

A) the citric acid cycle 
B) the Cori cycle 
C) glycolysis 
D) oxidative phosphorylation 
A) the citric acid cycle 
B) the Cori cycle 
C) glycolysis 
D) oxidative phosphorylation

Question 6

In the electron transport chain,FADH2 delivers hydrogen ions and electrons to which of the following?

Accepted Answer

A) coenzyme Q 
B) NAD+ 
C) flavoprotein 
D) cytochrome b 
A) coenzyme Q 
B) NAD+ 
C) flavoprotein 
D) cytochrome b

Question 7

Epinephrine is a peptide hormone.

Accepted Answer

A) True 
 B)False

Question 8

Contrast complete glucose oxidation,lactate fermentation,and alcoholic fermentation.

Accepted Answer

A) Glucose oxidation produces approximately the same amount of ATP as lactate and alcoholic fermentation together. 
B) Lactate fermentation is the most important process of the three for the production of energy in muscles that are performing extended periods of work. 
C) Lactate fermentation produces less ATP than does glucose oxidation,but approximately the same amount of ATP as alcoholic fermentation. 
D) The complete oxidation of glucose produces fructose; that of lactate fermentation produces lactic acid; and that of alcoholic fermentation produces ethanol. 
A) Glucose oxidation produces approximately the same amount of ATP as lactate and alcoholic fermentation together. 
B) Lactate fermentation is the most important process of the three for the production of energy in muscles that are performing extended periods of work. 
C) Lactate fermentation produces less ATP than does glucose oxidation,but approximately the same amount of ATP as alcoholic fermentation. 
D) The complete oxidation of glucose produces fructose; that of lactate fermentation produces lactic acid; and that of alcoholic fermentation produces ethanol.

Question 9

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 10

The net yield of ATP molecules from the complete catabolism of one molecule of glucose is _____ .

Accepted Answer

A) 18 
B) 24 
C) 32 
D) 42 
A) 18 
B) 24 
C) 32 
D) 42

Question 11

All pyruvate has a similar fate,in that it eventually produces _____ .

Accepted Answer

A) CO2 
B) acetyl CoA 
C) NAD+ 
D) FAD 
A) CO2 
B) acetyl CoA 
C) NAD+ 
D) FAD

Question 12

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

Question 13

Which of the following hormones acts to raise the blood glucose level?

Accepted Answer

A) glucagon 
B) insulin 
C) epinephrine 
D) More than one response is correct. 
A) glucagon 
B) insulin 
C) epinephrine 
D) More than one response is correct.

Question 14

Consider the diagram of the mitochondrion shown below.During electron transport,protons (H+)are pumped into what area of the mitochondrion?

Accepted Answer

A) 2 
B) 3 
C) 4 
D) 5 
A) 2 
B) 3 
C) 4 
D) 5

Question 15

The reaction of NAD+ to produce NADH is an example of what type of reaction?

Accepted Answer

A) oxidation 
B) reduction 
C) hydrolysis 
D) hydration 
A) oxidation 
B) reduction 
C) hydrolysis 
D) hydration

Question 16

Insulin decreases the rate of synthesis of glycogen and fatty acids.

Accepted Answer

A) True 
 B)False

Question 17

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 18

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 19

As a molecule of glucose passes through the glycolysis pathway,three molecules of pyruvate are formed.

Accepted Answer

A) True 
 B)False

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

In the diagram of the citric acid cycle shown,what do the two points indicated by an asterisk have in common?

Glycolysis

Each turn of the citric acid cycle produces ____ NADH coenzyme(s).

Glycolysis occurs within the _____ .

Lactate,produced in the muscles,is sent to the liver for processing.This is one step of ____.

In the electron transport chain,FADH2 delivers hydrogen ions and electrons to which of the following?

Epinephrine is a peptide hormone.

Contrast complete glucose oxidation,lactate fermentation,and alcoholic fermentation.

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

The net yield of ATP molecules from the complete catabolism of one molecule of glucose is _____ .

All pyruvate has a similar fate,in that it eventually produces _____ .

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

Which of the following hormones acts to raise the blood glucose level?

Consider the diagram of the mitochondrion shown below.During electron transport,protons (H+)are pumped into what area of the mitochondrion?

The reaction of NAD+ to produce NADH is an example of what type of reaction?

Insulin decreases the rate of synthesis of glycogen and fatty acids.

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

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

As a molecule of glucose passes through the glycolysis pathway,three molecules of pyruvate are formed.

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

Matter, measurements, and Calculations

Atoms and Molecules

Electronic Structure and the Periodic Law

Forces Between Particles

Chemical Reactions

The States of Matter

Solutions and Colloids

Reaction Rates and Equilibrium

Acids, bases, and Salts

Radioactivity and Nuclear Processes

Organic Compounds: Alkanes

Unsaturated Hydrocarbons

Alcohols, phenols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Esters

Amines and Amides

Carbohydrates

Lipids

Proteins

Enzymes

Nucleic Acids and Protein Synthesis

Nutrition and Energy for Life

Lipid and Amino Acid Metabolism

Body Fluids

Filters

In the electron transport chain,FADH₂ delivers hydrogen ions and electrons to which of the following?

Consider the diagram of the mitochondrion shown below.During electron transport,protons (H⁺)are pumped into what area of the mitochondrion?

The reaction of NAD⁺ to produce NADH is an example of what type of reaction?