Question 1

Excessive intake of animal protein foods could cause:

Accepted Answer

A)  excessive bone mineralization,causing brittleness.
B)  a diet to be too low in energy.
C)  increased waste production overworking the liver.
D)  an increased risk of heart disease.E) None of the above
F) B) and C)

Question 2

The specific sequence of amino acids in a polypeptide chain is determined by

Accepted Answer

A)  the types of food proteins that a person consumes.
B)  DNA found in the nucleus of cells.
C)  GI tract peptidases.
D)  random interactions between free amino acids in the cytoplasm of cells.E) A) and B)
F) B) and C)

Question 3

Protein quality is determined by:

Accepted Answer

A)  comparing the non-essential amino acid profile in a food with that in a reference protein.
B)  the biological activity of the actin and myosin filaments in meat products.
C)  how efficiently a protein in the diet can be used to make body proteins.
D)  the ratio of nonessential to essential amino acids present in a food.E) None of the above
F) B) and D)

Question 4

Which statement about amino acid absorption is FALSE?

Accepted Answer

A)  Absorption of larger polypeptides occurs commonly in healthy adults.
B)  Groups of similar amino acids share the same transport system.
C)  If one amino acid is supplemented,it can slow the absorption of other amino acids.
D)  Dipeptides and tripeptides are broken down to individual amino acids before leaving the mucosal cells of the small intestine.E) A) and B)
F) All of the above

Question 5

Hemoglobin is an example of:

Accepted Answer

A)  a defense protein.
B)  a transport protein.
C)  an enzyme.
D)  an immune protein (antibody) .E) B) and D)
F) C) and D)

Question 6

Transamination refers to:

Accepted Answer

A)  the transfer of an amino group from one amino acid to a carbon-containing molecule to form a nonessential amino acid.
B)  the removal of the amine group from an amino acid.
C)  the interaction of amino acid side chains important for protein folding.
D)  the formation of a peptide bond between adjacent amino acids.E) B) and D)
F) A) and B) A

Question 7

Which of the following is TRUE of protein needs in athletes?

Accepted Answer

A)  Strength and endurance athletes may require 50-100% more protein than the RDA.
B)  Protein supplements are not typically necessary as long as kcal needs are met.
C)  It is unlikely that protein requirements in excess of the AMDR would be required.
D)  All of these statements are correct.E) A) and C)
F) All of the above

Question 8

Obtaining protein from plant foods may be advantageous because plant foods:

Accepted Answer

A)  are typically good sources of fiber.
B)  may contain healthy poly- and mono- unsaturated fats.
C)  may lower blood cholesterol when consumed regularly.
D)  All of these statements are correct.E) None of the above
F) A) and B)

Question 9

Protein-energy malnutrition is characterized by:

Accepted Answer

A)  increased susceptibility to food allergies.
B)  wasting and increased susceptibility to infection.
C)  excessive urinary output.
D)  hyperglycemia.E) None of the above
F) All of the above

Question 10

The basic building blocks of proteins are:

Accepted Answer

A)  monosaccharides.
B)  amino acids.
C)  sterols.
D)  ketone bodies.E) B) and C)
F) A) and B) B

Question 11

Complete protein sources can be found in which MyPyramid food group?

Accepted Answer

A)  Fats and oils
B)  Fruits and vegetables
C)  Dairy
D)  GrainsE) A) and D)
F) B) and C)

Question 12

Which statement about dietary protein sources is FALSE?

Accepted Answer

A)  Animal products are the most highly concentrated sources of protein.
B)  Plant sources of protein are typically rich in fiber and phytochemicals.
C)  Legumes provide about as much protein per ½ cup serving as a cup of milk.
D)  Most people in the U.S.need protein supplements to meet dietary requirements.E) A) and B)
F) All of the above

Question 13

Protein complementation is a technique which:

Accepted Answer

A)  increases the biological value of a protein.
B)  increases the nitrogen content of dietary protein sources.
C)  minimizes nitrogen loss in the urine.
D)  combines proteins from different sources so that essential amino acids requirements are met.E) A) and D)
F) C) and D) D

Question 14

A complete dietary protein:

Accepted Answer

A)  contains the element sulfur.
B)  has been hydrolyzed so that digestion is not necessary.
C)  provides essential amino acids in the proportion needed to support protein synthesis.
D)  has a low biological value.E) B) and C)
F) C) and D)

Question 15

Which metabolic waste product increases when amino acids are converted to other metabolic intermediates?

Accepted Answer

A)  Ammonia
B)  Pyruvate
C)  CO2
D)  BilirubinE) A) and D)
F) B) and C)

Question 16

Protein complementation is most important for people who are:

Accepted Answer

A)  vegan vegetarians.
B)  recovering from surgery.
C)  lacto-ovo vegetarians.
D)  consumers of both plant and animal foods.E) C) and D)
F) A) and C)

Question 17

All of the following components are always associated with an amino acid EXCEPT:

Accepted Answer

A)  an amino group.
B)  an acid group.
C)  a phosphate group.
D)  a side chain (functional group) .E) All of the above
F) B) and C)

Question 18

Kwashiorkor is best characterized by:

Accepted Answer

A)  severe protein deficiency in young children.
B)  increased susceptibility to food allergies in adults.
C)  misshapen (sickle-shaped) red blood cells.
D)  the inability to digest proteins from soy and other plant proteins.E) C) and D)
F) B) and C)

Question 19

The enzymes trypsin and chymotrypsin:

Accepted Answer

A)  break large polypeptides into smaller peptides.
B)  are needed to denature proteins.
C)  rearrange the sequence of amino acids in a polypeptide.
D)  are needed to make nonessential amino acids.E) All of the above
F) A) and B)

Question 20

The process of ___________ involves copying the DNA code from the gene to a molecule of mRNA.

Accepted Answer

A)  transcription.
B)  nuclear shuttling.
C)  transamination.
D)  translation.E) C) and D)
F) B) and D)

Exam 6: Proteins and Amino Acids

Excessive intake of animal protein foods could cause:

Correct AnswerverifiedShow Answer

The specific sequence of amino acids in a polypeptide chain is determined by

Correct AnswerverifiedShow Answer

Protein quality is determined by:

Correct AnswerverifiedShow Answer

Which statement about amino acid absorption is FALSE?

Correct AnswerverifiedShow Answer

Hemoglobin is an example of:

Correct AnswerverifiedShow Answer

Transamination refers to:

Correct AnswerverifiedA

Which of the following is TRUE of protein needs in athletes?

Correct AnswerverifiedShow Answer

Obtaining protein from plant foods may be advantageous because plant foods:

Correct AnswerverifiedShow Answer

Protein-energy malnutrition is characterized by:

Correct AnswerverifiedShow Answer

The basic building blocks of proteins are:

Correct AnswerverifiedB

Complete protein sources can be found in which MyPyramid food group?

Correct AnswerverifiedShow Answer

Which statement about dietary protein sources is FALSE?

Correct AnswerverifiedShow Answer

Protein complementation is a technique which:

Correct AnswerverifiedD

A complete dietary protein:

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Which metabolic waste product increases when amino acids are converted to other metabolic intermediates?

Correct AnswerverifiedShow Answer

Protein complementation is most important for people who are:

Correct AnswerverifiedShow Answer

All of the following components are always associated with an amino acid EXCEPT:

Correct AnswerverifiedShow Answer

Kwashiorkor is best characterized by:

Correct AnswerverifiedShow Answer

The enzymes trypsin and chymotrypsin:

Correct AnswerverifiedShow Answer

The process of ___________ involves copying the DNA code from the gene to a molecule of mRNA.

Correct AnswerverifiedShow Answer

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A

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B

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D

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