Question 1

Interactions between side chains of and Aspartate and Arginine at neutral pH would be?

Accepted Answer

A)   hydrophobic
B)   ionic
C)   hydrogen bonding
D)   steric
E)   covalentF) A) and D)
G) A) and C)

Question 2

Which amino acid is responsible for stabilizing the stucture of a protein by forming pairs of sulfhydryl groups?

Accepted Answer

Cysteine

Question 3

Choose the correct answer from the list below. Not all of the answers will be used.
-____________: Chiral type of amino acids found in proteins.

Accepted Answer

A)  L amino acids
B)  water
C)  protons
D)  zwitterions
E)  leucineF) serineG) tyrosineH) cysteineI) glutamateJ) histidineK) prolineL) asparagineM) D amino acidsN) D) and J)
O) A) and I)

Question 4

Which amino acids contain reactive aliphatic hydroxyl groups?

Accepted Answer

A)   serine and methionine
B)   serine and threonine
C)   methionine and threonine
D)   cysteine and methionine
E)   cysteine and threonineF) C) and D)
G) A) and E)

Question 5

What is the advantage of having multiple functional groups in proteins?

Accepted Answer

The rich diversity of function...

Question 6

The ____________ group is the functional group that makes an amino acid more reactive than nonpolar amino acids such as valine, alanine, and phenylalanine.

Accepted Answer

The answer of The ____________ group is the functional group...

Question 7

The amino acid that contains a weakly acidic "phenolic" group is __________.

Accepted Answer

The answer of The amino acid that contains a weakly...

Question 8

What is the difference between nonessential and essential amino acids?

Accepted Answer

The former are amino acids tha...

Question 9

Which amino acid has a carboxyl group in its side chain?

Accepted Answer

A)   glutamine
B)   galanine
C)   cysteine
D)   glutamate
E)   None of the above.F) A) and C)
G) C) and E) D

Question 10

Choose the correct answer from the list below. Not all of the answers will be used.
-____________: The amino acid with a negatively charged side chain at neutral pH.

Accepted Answer

A)  L amino acids
B)  water
C)  protons
D)  zwitterions
E)  leucineF) serineG) tyrosineH) cysteineI) glutamateJ) histidineK) prolineL) asparagineM) D amino acidsN) G) and J)
O) K) and L)

Question 11

In what pH range is zwitterionic alanine the predominate structure?

Accepted Answer

A)   0-2
B)   9-14
C)   8-10
D)   2-4
E)   2-9F) A) and D)
G) A) and B) E

Question 12

Choose the correct answer from the list below. Not all of the answers will be used.
-____________: The amino acid with an imidazole side chain.

Accepted Answer

A)  L amino acids
B)  water
C)  protons
D)  zwitterions
E)  leucineF) serineG) tyrosineH) cysteineI) glutamateJ) histidineK) prolineL) asparagineM) D amino acidsN) A) and D)
O) C) and K)

Question 13

At a pH of 12, what charged group(s)  is/are present in glycine?

Accepted Answer

A)   -NH3+
B)   -COO-
C)   -NH2+
D)   A and B
E)   A, B, and CF) A) and E)
G) A) and D)

Question 14

What is the net charge of each amino acid for each of the cases in the question above?

Accepted Answer

For glycine, the charges are: ...

Question 15

Choose the correct answer from the list below. Not all of the answers will be used.
-____________: Another name for dipolar molecules.

Accepted Answer

A)  L amino acids
B)  water
C)  protons
D)  zwitterions
E)  leucineF) serineG) tyrosineH) cysteineI) glutamateJ) histidineK) prolineL) asparagineM) D amino acidsN) A) and B)
O) C) and H)

Question 16

__________ is an amino acid with a hydrophobic side chain containing a thioether.

Accepted Answer

The answer of __________ is an amino acid with a...

Question 17

____________ is often seen in a child with a protein-deficient diet.

Accepted Answer

The answer of ____________ is often seen in a child...

Question 18

Between the amino and the carboxyl functional group, the ________ has the lowest affinity for a proton.

Accepted Answer

The answer of Between the amino and the carboxyl functional...

Question 19

Which amino acids have a side chain that includes a modified carboxyl group, carboxaminde?

Accepted Answer

Asparagine...

Question 20

Why does this happen?

Accepted Answer

This is a nutritional state where there ...

Exam 3: Amino Acids

Interactions between side chains of and Aspartate and Arginine at neutral pH would be?

Correct AnswerverifiedShow Answer

Which amino acid is responsible for stabilizing the stucture of a protein by forming pairs of sulfhydryl groups?

Correct AnswerverifiedCysteine

Choose the correct answer from the list below. Not all of the answers will be used. -____________: Chiral type of amino acids found in proteins.

Correct AnswerverifiedShow Answer

Which amino acids contain reactive aliphatic hydroxyl groups?

Correct AnswerverifiedShow Answer

What is the advantage of having multiple functional groups in proteins?

Correct AnswerverifiedThe rich diversity of function...View AnswerShow Answer

The ____________ group is the functional group that makes an amino acid more reactive than nonpolar amino acids such as valine, alanine, and phenylalanine.

Correct AnswerverifiedShow Answer

The amino acid that contains a weakly acidic "phenolic" group is __________.

Correct AnswerverifiedShow Answer

What is the difference between nonessential and essential amino acids?

Correct AnswerverifiedThe former are amino acids tha...View AnswerShow Answer

Which amino acid has a carboxyl group in its side chain?

Correct AnswerverifiedD

Choose the correct answer from the list below. Not all of the answers will be used. -____________: The amino acid with a negatively charged side chain at neutral pH.

Correct AnswerverifiedShow Answer

In what pH range is zwitterionic alanine the predominate structure?

Correct AnswerverifiedE

Choose the correct answer from the list below. Not all of the answers will be used. -____________: The amino acid with an imidazole side chain.

Correct AnswerverifiedShow Answer

At a pH of 12, what charged group(s) is/are present in glycine?

Correct AnswerverifiedShow Answer

What is the net charge of each amino acid for each of the cases in the question above?

Correct AnswerverifiedFor glycine, the charges are: ...View AnswerShow Answer

Choose the correct answer from the list below. Not all of the answers will be used. -____________: Another name for dipolar molecules.

Correct AnswerverifiedShow Answer

__________ is an amino acid with a hydrophobic side chain containing a thioether.

Correct AnswerverifiedShow Answer

____________ is often seen in a child with a protein-deficient diet.

Correct AnswerverifiedShow Answer

Between the amino and the carboxyl functional group, the ________ has the lowest affinity for a proton.

Correct AnswerverifiedShow Answer

Which amino acids have a side chain that includes a modified carboxyl group, carboxaminde?

Correct AnswerverifiedAsparagine...View AnswerShow Answer

Why does this happen?

Correct AnswerverifiedThis is a nutritional state where there ...View AnswerShow Answer

Correct Answer
verified

Correct Answer
verified
Cysteine

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The rich diversity of function...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The former are amino acids tha...
View Answer

Correct Answer
verified
D

Correct Answer
verified

Correct Answer
verified
E

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
For glycine, the charges are: ...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Asparagine...
View Answer

Correct Answer
verified
This is a nutritional state where there ...
View Answer