Question 1

The electron transport chain exists for the purpose of removing excess electrons from the cell.

Accepted Answer

A) True 
 B)False

Question 2

Approximately ____ percent of the energy available in glucose catabolism is trapped in the formation of ATP.

Accepted Answer

A)  20 
B)  40 
C)  60 
D)  80 
A)  20 
B)  40 
C)  60 
D)  80

Question 3

The citric acid cycle (CAC)is also called the tricarboxylic acid (TCA)cycle and the Krebs cycle.

Accepted Answer

A) True 
 B)False

Question 4

The main source of energy for the brain is _____ .

Accepted Answer

A)  glucose 
B)  fatty acids 
C)  glycogen 
D)  glycerol 
A)  glucose 
B)  fatty acids 
C)  glycogen 
D)  glycerol

Question 5

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 6

Lactose intolerance

Accepted Answer

A)  can only be controlled by eliminating dairy products. 
B)  produces symptoms including bloating and diarrhea. 
C)  is due to a missing enzyme by approximately 20% of adults in the USA. 
D)  All of these responses are correct. 
A)  can only be controlled by eliminating dairy products. 
B)  produces symptoms including bloating and diarrhea. 
C)  is due to a missing enzyme by approximately 20% of adults in the USA. 
D)  All of these responses are correct.

Question 7

During gluconeogenesis,pyruvate is formed from glycerol,certain amino acids and _____ .

Accepted Answer

A)  acetyl CoA 
B)  glucose 
C)  lactate 
D)  glycogen 
A)  acetyl CoA 
B)  glucose 
C)  lactate 
D)  glycogen

Question 8

Low carbohydrate intake during heavy exercise followed by high carbohydrate intake with light exercise is an example of ____ loading.

Accepted Answer

A)  carbohydrate 
B)  ATP 
C)  energy 
D)  glucose 
A)  carbohydrate 
B)  ATP 
C)  energy 
D)  glucose

Question 9

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 10

The following represents overall net equation for the citric acid cycle.
acetyl CoA + 3NAD+ + FAD + GDP + Pi + 2H2O

2CO2 + CoA-S-H + 3NADH + 2H+ + FADH2 + GTP

Accepted Answer

A) True 
 B)False

Question 11

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

Question 12

Glucose-6-phosphate is best represented by which of the following? (Note: the wavy bond indicates that the -OH could either be up or down. )

Accepted Answer

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

Question 13

Which of the following is not considered a component of the electron transport chain?

Accepted Answer

A)  cytochrome c (cyt c) 
B)  coenzyme Q (CoQ) 
C)  Fe-S protein (Fe-S) 
D)  adenosine diphosphate (ADP) 
A)  cytochrome c (cyt c) 
B)  coenzyme Q (CoQ) 
C)  Fe-S protein (Fe-S) 
D)  adenosine diphosphate (ADP)

Question 14

Which of the following hormones acts to lower 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 15

Under anaerobic conditions in the body,pyruvate is converted to _____ .

Accepted Answer

A)  ethanol 
B)  CO2 & H2O 
C)  acetyl CoA 
D)  lactate 
A)  ethanol 
B)  CO2 & H2O 
C)  acetyl CoA 
D)  lactate

Question 16

The majority of ATP produced during the catabolism of glucose is formed during _____ .

Accepted Answer

A)  oxidative phosphorylation 
B)  glycolysis 
C)  the citric acid cycle 
D)  the formation of acetyl CoA 
A)  oxidative phosphorylation 
B)  glycolysis 
C)  the citric acid cycle 
D)  the formation of acetyl CoA

Question 17

The processes of producing both lactate and ethanol are anaerobic processes.

Accepted Answer

A) True 
 B)False

Question 18

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.

Question 19

Epinephrine is a peptide hormone.

Accepted Answer

A) True 
 B)False

Question 20

Insulin,glucagon and epinephrine all target the liver for control of glucose levels in the body.

Accepted Answer

A) True 
 B)False

Exam 23: Carbohydrate Metabolism

The electron transport chain exists for the purpose of removing excess electrons from the cell.

Approximately ____ percent of the energy available in glucose catabolism is trapped in the formation of ATP.

The citric acid cycle (CAC)is also called the tricarboxylic acid (TCA)cycle and the Krebs cycle.

The main source of energy for the brain is _____ .

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

Lactose intolerance

During gluconeogenesis,pyruvate is formed from glycerol,certain amino acids and _____ .

Low carbohydrate intake during heavy exercise followed by high carbohydrate intake with light exercise is an example of ____ loading.

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

The following represents overall net equation for the citric acid cycle. acetyl CoA + 3NAD+ + FAD + GDP + Pi + 2H2O 2CO2 + CoA-S-H + 3NADH + 2H+ + FADH2 + GTP

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

Glucose-6-phosphate is best represented by which of the following? (Note: the wavy bond indicates that the -OH could either be up or down. )

Which of the following is not considered a component of the electron transport chain?

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

Under anaerobic conditions in the body,pyruvate is converted to _____ .

The majority of ATP produced during the catabolism of glucose is formed during _____ .

The processes of producing both lactate and ethanol are anaerobic processes.

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

Epinephrine is a peptide hormone.

Insulin,glucagon and epinephrine all target the liver for control of glucose levels in the body.

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

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

The following represents overall net equation for the citric acid cycle. acetyl CoA + 3NAD⁺ + FAD + GDP + P_i + 2H₂O 2CO₂ + CoA-S-H + 3NADH + 2H⁺ + FADH₂ + GTP