Question 1

How can the carbon skeletons of amino acids enter the common catabolic pathway?

Accepted Answer

A)  as part of amino acids 
B)  as part of complete proteins 
C)  as α-ketoacids 
D)  as any of these 
A)  as part of amino acids 
B)  as part of complete proteins 
C)  as α-ketoacids 
D)  as any of these

Question 2

Jaundice is associated with the excessive buildup of which of the following?

Accepted Answer

A)  bilirubin 
B)  biliverdin 
C)  ferritin 
D)  urobilin 
A)  bilirubin 
B)  biliverdin 
C)  ferritin 
D)  urobilin

Question 3

The amino acid pool consists of which of the following?

Accepted Answer

A)  the amino acids found in our diets 
B)  the free amino acids found inside the cells 
C)  the free amino acids found outside the cells 
D)  both b and c 
A)  the amino acids found in our diets 
B)  the free amino acids found inside the cells 
C)  the free amino acids found outside the cells 
D)  both b and c

Question 4

The production of 3-phosphoglycerate from 1,3-bisphosphoglycerate is an example of which of the following?

Accepted Answer

A)  addition 
B)  dephosphorylation 
C)  phosphorylation 
D)  oxidation 
A)  addition 
B)  dephosphorylation 
C)  phosphorylation 
D)  oxidation

Question 5

Consider the following reaction sequence.  
-Which of the following are not formed as a result the action of lipases on lipids?

Accepted Answer

A)  amino acids 
B)  fatty acids 
C)  monoglycerides 
D)  None, all are formed from lipids. 
A)  amino acids 
B)  fatty acids 
C)  monoglycerides 
D)  None, all are formed from lipids.

Question 6

What is the life span of a red blood cell?

Accepted Answer

A)  2 weeks 
B)  1 month 
C)  4 months 
D)  1 year 
A)  2 weeks 
B)  1 month 
C)  4 months 
D)  1 year

Question 7

How many amino acids are both glucogenic and ketogenic?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4

Question 8

Transamination of which amino acid produces pyruvate directly?

Accepted Answer

A)  alanine 
B)  glutamine 
C)  glycine 
D)  leucine 
A)  alanine 
B)  glutamine 
C)  glycine 
D)  leucine

Question 9

Which of the following is the initial product formed during glycerol catabolism?

Accepted Answer

A)  glycerol 1-phosphate 
B)  glycerol 2-phosphate 
C)  glycerol 1,2-bisphosphate 
D)  glycerol 1,3-bisphosphate 
A)  glycerol 1-phosphate 
B)  glycerol 2-phosphate 
C)  glycerol 1,2-bisphosphate 
D)  glycerol 1,3-bisphosphate

Question 10

Which of the following is the pathway used by cells to obtain energy from fatty acids?

Accepted Answer

A)  α-oxidation 
B)  α-reduction 
C)  β-oxidation 
D)  β-reduction 
A)  α-oxidation 
B)  α-reduction 
C)  β-oxidation 
D)  β-reduction

Question 11

Which of the following chemicals causes much of the damage associated with fetal alcohol syndrome?

Accepted Answer

A)  acetaldehyde 
B)  acetic acid 
C)  acetone 
D)  ethanol 
A)  acetaldehyde 
B)  acetic acid 
C)  acetone 
D)  ethanol

Question 12

Which of the following is the oxidizing agent in the second oxidation step of the β-oxidation of fatty acids?

Accepted Answer

A)  FAD 
B)  FADH2 
C)  NAD+ 
D)  NADH + H+ 
A)  FAD 
B)  FADH2 
C)  NAD+ 
D)  NADH + H+

Question 13

Which of the following is true of anaerobic reactions?

Accepted Answer

A)  They are all redox reactions. 
B)  They are never redox reactions. 
C)  They occur in the presence of oxygen. 
D)  They occur in the absence of oxygen. 
A)  They are all redox reactions. 
B)  They are never redox reactions. 
C)  They occur in the presence of oxygen. 
D)  They occur in the absence of oxygen.

Question 14

How many molecules of ATP are involved in the conversion of glucose to glucose 6-phosphate?

Accepted Answer

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

Question 15

How can the carbon skeletons of amino acids enter the common catabolic pathway?

Accepted Answer

A)  as part of amino acids 
B)  as part of complete proteins 
C)  as acetyl coenzyme A 
D)  as any of these 
A)  as part of amino acids 
B)  as part of complete proteins 
C)  as acetyl coenzyme A 
D)  as any of these

Question 16

In NADPH and NADP+ where does diphosphate bind to the two sugar units?

Accepted Answer

A)  at carbon 1 on each of the two sugar units 
B)  at carbon 3 on one sugar unit and at carbon 5 on the other 
C)  at carbon 3 on each of the two sugar units 
D)  at carbon 5 on each of the two sugar units 
A)  at carbon 1 on each of the two sugar units 
B)  at carbon 3 on one sugar unit and at carbon 5 on the other 
C)  at carbon 3 on each of the two sugar units 
D)  at carbon 5 on each of the two sugar units

Question 17

Which of the following is(are) consumed in the process of converting glycerol to dihydroxyacetone phosphate?

Accepted Answer

A)  ADP 
B)  NADH+ 
C)  both a and b 
D)  neither a nor b 
A)  ADP 
B)  NADH+ 
C)  both a and b 
D)  neither a nor b

Question 18

Which of the following diffuses from the mitochondria into the cytoplasm?

Accepted Answer

A)  argininosuccinate 
B)  carbamoyl phosphate 
C)  citrulline 
D)  ornithine 
A)  argininosuccinate 
B)  carbamoyl phosphate 
C)  citrulline 
D)  ornithine

Question 19

What fraction of the energy produced by the complete metabolism of stearic acid is associated with β-oxidation of the acid?

Accepted Answer

A)  approximately 25% 
B)  approximately 50% 
C)  approximately 75% 
D)  100% 
A)  approximately 25% 
B)  approximately 50% 
C)  approximately 75% 
D)  100%

Question 20

NADPH is needed for the synthesis of which of the following?

Accepted Answer

A)  amino acids 
B)  cholesterol 
C)  unsaturated fatty acids 
D)  all of these 
A)  amino acids 
B)  cholesterol 
C)  unsaturated fatty acids 
D)  all of these

Exam 28: Specific Catabolic Pathways: Carbohydrate, Lipid, and Protein Metabolism

How can the carbon skeletons of amino acids enter the common catabolic pathway?

Jaundice is associated with the excessive buildup of which of the following?

The amino acid pool consists of which of the following?

The production of 3-phosphoglycerate from 1,3-bisphosphoglycerate is an example of which of the following?

Consider the following reaction sequence. -Which of the following are not formed as a result the action of lipases on lipids?

What is the life span of a red blood cell?

How many amino acids are both glucogenic and ketogenic?

Transamination of which amino acid produces pyruvate directly?

Which of the following is the initial product formed during glycerol catabolism?

Which of the following is the pathway used by cells to obtain energy from fatty acids?

Which of the following chemicals causes much of the damage associated with fetal alcohol syndrome?

Which of the following is the oxidizing agent in the second oxidation step of the β-oxidation of fatty acids?

Which of the following is true of anaerobic reactions?

How many molecules of ATP are involved in the conversion of glucose to glucose 6-phosphate?

How can the carbon skeletons of amino acids enter the common catabolic pathway?

In NADPH and NADP+ where does diphosphate bind to the two sugar units?

Which of the following is(are) consumed in the process of converting glycerol to dihydroxyacetone phosphate?

Which of the following diffuses from the mitochondria into the cytoplasm?

What fraction of the energy produced by the complete metabolism of stearic acid is associated with β-oxidation of the acid?

NADPH is needed for the synthesis of which of the following?

Matter, Energy, and Measurement

Atoms

Chemical Bonds

Chemical Reactions

Gases, Liquids, and Solids

Solutions and Colloids

Reaction Rates and Chemical Equilibrium

Acids and Bases

Nuclear Chemistry

Organic Chemistry

Alkanes

Alkenes and Alkynes

Benzene and Its Derivatives

Alcohols, Ethers, and Thiols

Chirality: the Handedness of Molecules

Amines

Aldehydes and Ketones

Carboxylic Acids

Carboxylic Anhydrides, Esters, and Amides

Carbohydrates

Lipids

Proteins

Enzymes

Chemical Communications: Neurotransmitters and Hormones

Nucleotides, Nucleic Acids, and Heredity

Gene Expression and Protein Synthesis

Bioenergetics: How the Body Converts Food to Energy

Biosynthetic Pathways

Nutrition

Immunochemistry

Body Fluids

Filters

In NADPH and NADP⁺ where does diphosphate bind to the two sugar units?