Question 1

All of the following would be able to function as emulsifying agents in water EXCEPT which one?

Accepted Answer

A)  sphingomyelin 
B)  2-acylglycerol 
C)  phosphatidylcholine 
D)  sodium stearate 
E)  cholesterol ester 
A)  sphingomyelin 
B)  2-acylglycerol 
C)  phosphatidylcholine 
D)  sodium stearate 
E)  cholesterol ester

Question 2

bile salts are stored in the

Accepted Answer

A)  gall bladder. 
B)  liver. 
C)  small intestine. 
D)  all of the above. 
A)  gall bladder. 
B)  liver. 
C)  small intestine. 
D)  all of the above.

Question 3

Most nutrients are absorbed in the:

Accepted Answer

A)  Colon 
B)  Large intestine 
C)  Small intestine 
D)  Stomach 
A)  Colon 
B)  Large intestine 
C)  Small intestine 
D)  Stomach

Question 4

Enzymes involved in the digestion of dietary protein in the small intestine include all of the following EXCEPT

Accepted Answer

A)  trypsin 
B)  elastase 
C)  chymotrypsin 
D)  carboxypeptidase A 
E)  pepsin 
A)  trypsin 
B)  elastase 
C)  chymotrypsin 
D)  carboxypeptidase A 
E)  pepsin

Question 5

Alpha-1,6-glucosidase is an enzyme in humans which is

Accepted Answer

A)  found in salivary and pancreatic secretions. 
B)  secreted by cells of the gastric mucosa. 
C)  located in the epithelium of the large intestine. 
D)  elaborated by cells in the duodenum. 
E)  a constituent of bile. 
A)  found in salivary and pancreatic secretions. 
B)  secreted by cells of the gastric mucosa. 
C)  located in the epithelium of the large intestine. 
D)  elaborated by cells in the duodenum. 
E)  a constituent of bile.

Question 6

Monoglycerides formed by digestion of unmodified animal fats usually contain

Accepted Answer

A)  a saturated fatty acid residue. 
B)  an unsaturated fatty acid residue. 
C)  about equal amounts of saturated and unsaturated fatty acid residues. 
A)  a saturated fatty acid residue. 
B)  an unsaturated fatty acid residue. 
C)  about equal amounts of saturated and unsaturated fatty acid residues.

Question 7

Chymotrypsin is

Accepted Answer

A)  an enterokinase. 
B)  an endopeptidase. 
C)  a carboxypeptidase. 
D)  the precursor of trypsin. 
E)  an aminopeptidase. 
A)  an enterokinase. 
B)  an endopeptidase. 
C)  a carboxypeptidase. 
D)  the precursor of trypsin. 
E)  an aminopeptidase.

Question 8

Which of the following is produced by the liver?

Accepted Answer

A)  trypsinogen 
B)  chymotrypsinogen 
C)  carboxypeptidase 
D)  enterokinase 
E)  glycocholic acid 
A)  trypsinogen 
B)  chymotrypsinogen 
C)  carboxypeptidase 
D)  enterokinase 
E)  glycocholic acid

Question 9

Which molecule is a zymogen activated by hydrolysis in the intestine?

Accepted Answer

A)  trypsinogen 
B)  chymotrypsin 
C)  carboxypeptidase 
D)  enterokinase 
E)  pepsinogen 
A)  trypsinogen 
B)  chymotrypsin 
C)  carboxypeptidase 
D)  enterokinase 
E)  pepsinogen

Question 10

Which enzyme is an endopeptidase secreted as a zymogen by the pancreas?

Accepted Answer

A)  trypsin 
B)  pepsin 
C)  amylase 
D)  enterokinase 
E)  carboxypeptidase 
A)  trypsin 
B)  pepsin 
C)  amylase 
D)  enterokinase 
E)  carboxypeptidase

Question 11

In a patient who has had a significant portion of the stomach removed in surgery, the action of which of the following enzymes would be significantly reduced?

Accepted Answer

A)  trypsin 
B)  enteropeptidase 
C)  elastase 
D)  pepsin 
E)  carboxypeptidase A 
A)  trypsin 
B)  enteropeptidase 
C)  elastase 
D)  pepsin 
E)  carboxypeptidase A

Question 12

Pancreatic lipase is an enzyme which

Accepted Answer

A)  hydrolyzes triglycerides to glycerol plus fatty acid. 
B)  specifically attacks the 2-position of triglycerides. 
C)  specifically attacks the 1- and 3-ester linkages of triglycerides. 
D)  specifically hydrolyzes 2-monoglycerides to glycerol and fatty acid. 
E)  specifically hydrolyzes phospholipids. 
A)  hydrolyzes triglycerides to glycerol plus fatty acid. 
B)  specifically attacks the 2-position of triglycerides. 
C)  specifically attacks the 1- and 3-ester linkages of triglycerides. 
D)  specifically hydrolyzes 2-monoglycerides to glycerol and fatty acid. 
E)  specifically hydrolyzes phospholipids.

Question 13

Lactase catalyzes which of the following?

Accepted Answer

A)  galactose --> glucose + glucose 6-phosphate 
B)  sucrose --> glucose + fructose 
C)  lactate --> glucose + galactose 
D)  lactose --> glucose + galactose 
E)  lactate --> pyruvate 
A)  galactose --> glucose + glucose 6-phosphate 
B)  sucrose --> glucose + fructose 
C)  lactate --> glucose + galactose 
D)  lactose --> glucose + galactose 
E)  lactate --> pyruvate

Question 14

The major function of chylomicrons is transport of

Accepted Answer

A)  cholesterol from the liver to peripheral cells. 
B)  dietary triglycerides to peripheral tissues. 
C)  fatty acids from the adipose tissue to energy-requiring tissues such as skeletal muscle. 
D)  endogenous triglycerides from the liver. 
E)  cholesterol from peripheral tissues to the liver for disposal. 
A)  cholesterol from the liver to peripheral cells. 
B)  dietary triglycerides to peripheral tissues. 
C)  fatty acids from the adipose tissue to energy-requiring tissues such as skeletal muscle. 
D)  endogenous triglycerides from the liver. 
E)  cholesterol from peripheral tissues to the liver for disposal.

Question 15

The intestinal cell is probably unique in that it can

Accepted Answer

A)  Synthesize lipoprotein. 
B)  Acylate monoglyceride to form triglyceride. 
C)  Synthesize phosphatidic acid. 
D)  Absorb free fatty acids. 
E)  Utilize glucose to form glycerol phosphate. 
A)  Synthesize lipoprotein. 
B)  Acylate monoglyceride to form triglyceride. 
C)  Synthesize phosphatidic acid. 
D)  Absorb free fatty acids. 
E)  Utilize glucose to form glycerol phosphate.

Question 16

Bile salts are synthesized in the

Accepted Answer

A)  gall bladder. 
B)  liver. 
C)  small intestine. 
D)  all of the above. 
A)  gall bladder. 
B)  liver. 
C)  small intestine. 
D)  all of the above.

Question 17

All of the following statements are correct EXCEPT which one?

Accepted Answer

A)  triglyceride digestion requires a lipase produced by the pancreas. 
B)  triglycerides can be emulsified in the gut using bile salts. 
C)  Phospholipids can aid emulsification of triglycerides in the gut. 
D)  lipases use water as a cosubstrate. 
E)  Long chain acyl-CoA's are products when lipases degrade triglycerides. 
A)  triglyceride digestion requires a lipase produced by the pancreas. 
B)  triglycerides can be emulsified in the gut using bile salts. 
C)  Phospholipids can aid emulsification of triglycerides in the gut. 
D)  lipases use water as a cosubstrate. 
E)  Long chain acyl-CoA's are products when lipases degrade triglycerides.

Question 18

Which of the following statements is true concerning secretagogues?

Accepted Answer

A)  They are secreted by exocrine glands into the digestive tract 
B)  They stimulate the secretion of calcium ions into the digestive tract 
C)  They may be comprised of neurotransmitters and hormones that act on exocrine cells 
D)  They are cleaved by digestive enzymes and absorbed into small intestine 
E)  They are released as zymogens from exocrine cells 
A)  They are secreted by exocrine glands into the digestive tract 
B)  They stimulate the secretion of calcium ions into the digestive tract 
C)  They may be comprised of neurotransmitters and hormones that act on exocrine cells 
D)  They are cleaved by digestive enzymes and absorbed into small intestine 
E)  They are released as zymogens from exocrine cells

Question 19

Human bile contains all of the following EXCEPT

Accepted Answer

A)  glycocholic acid. 
B)  mucin. 
C)  phosphoglycerides. 
D)  triacylglycerol. 
E)  taurocholic acid. 
A)  glycocholic acid. 
B)  mucin. 
C)  phosphoglycerides. 
D)  triacylglycerol. 
E)  taurocholic acid.

Question 20

What are the total products of triglyceride digestion in the lumen of the small intestines?

Accepted Answer

A)  Free glycerol and free fatty acids. 
B)  2-Monoglycerides and free fatty acids. 
C)  1-Monoglycerides and free fatty acids 
D)  2-Monoglycerides, free glycerol and free fatty acids. 
E)  Diglycerides and free fatty acids. 
A)  Free glycerol and free fatty acids. 
B)  2-Monoglycerides and free fatty acids. 
C)  1-Monoglycerides and free fatty acids 
D)  2-Monoglycerides, free glycerol and free fatty acids. 
E)  Diglycerides and free fatty acids.

Exam 25: Digestion and Absorption of Basic Nutritional Constituents

All of the following would be able to function as emulsifying agents in water EXCEPT which one?

bile salts are stored in the

Most nutrients are absorbed in the:

Enzymes involved in the digestion of dietary protein in the small intestine include all of the following EXCEPT

Alpha-1,6-glucosidase is an enzyme in humans which is

Monoglycerides formed by digestion of unmodified animal fats usually contain

Chymotrypsin is

Which of the following is produced by the liver?

Which molecule is a zymogen activated by hydrolysis in the intestine?

Which enzyme is an endopeptidase secreted as a zymogen by the pancreas?

In a patient who has had a significant portion of the stomach removed in surgery, the action of which of the following enzymes would be significantly reduced?

Pancreatic lipase is an enzyme which

Lactase catalyzes which of the following?

The major function of chylomicrons is transport of

The intestinal cell is probably unique in that it can

Bile salts are synthesized in the

All of the following statements are correct EXCEPT which one?

Which of the following statements is true concerning secretagogues?

Human bile contains all of the following EXCEPT

What are the total products of triglyceride digestion in the lumen of the small intestines?

Eukaryotic Cell Structure

DNA and RNA: Composition and Structure

Protein I: Composition and Structure

DNA Replication, Recombination, and Repair

RNA: Transcription and Rna Processing

Protein Synthesis: Translation and Posttranslational Modifications

Recombinant Dna and Biotechnology

Regulation of Gene Expression

Protein II: Structure-Function Relationships in Protein Families

Enzymes: Classification, Kinetics, and Control

The Cytochromes P450 and Nitric Oxide Synthases

Biological Membranes: Structure and Membrane Transport

Fundamentals of Signal Transduction

Bioenergetics and Oxidative Metabolism

Carbohydrate Metabolism I: Major Metabolic Pathways and Their Control

Carbohydrate Metabolism II: Special Pathways and Glycoconjugates

Lipid Metabolism I: Synthesis, Storage, and Utilization of Fatty Acids and Triacylglycerols

Lipid Metabolism II: Pathways of Metabolism of Special Lipids

Amino Acid Metabolism

Purine and Pyrimidine Nucleotide Metabolism

Metabolic Interrelationships

Biochemistry of Hormones

Molecular Cell Biology

Cell Cycle, Programmed Cell Death, and Cancer

Digestion and Absorption of Basic Nutritional Constituents

Principles of Nutrition I and II

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