Amino Acids and Proteins
Amino Acids and Proteins

Amino Acids and Proteins

Lead Author(s): Saylor Academy

Source: Saylor

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A question pack on advanced biochemistry from Saylor Academy.

This content is licensed under the Creative Commons Attribution 3.0 Unported License.

Amino Acids and Proteins Q1

A reaction with a delta G of zero:

A

Requires energy

B

Is at equilibrium

C

Is spontaneous

D

None of the above

Amino Acids and Proteins Q2

A solution with a pH of 5 is:

A

Acidic

B

Basic

C

Neutral

D

None of the above

Amino Acids and Proteins Q3

Alcohols contain a ______________ group.

A

Hydroxyl

B

Sulfur

C

Phenol

D

None of the above

Amino Acids and Proteins Q4

Biologically important noncovalent bonds include:

A

Van der Waals interactions

B

Hydrogen bonds

C

Electrostatic interactions

D

All of the above

Amino Acids and Proteins Q5

Entropy is ______________.

A

The degree of disorder of a system

B

The degree of energy of a system

C

A type of noncovalent bond

D

A type of covalent bond

Amino Acids and Proteins Q6

The DNA of a eukaryotic cell is stored within the ______________.

A

Lysosome

B

Nucleus

C

Ribosome

D

Endoplasmic Reticulum

Amino Acids and Proteins Q7

The term "kinetics" refers to:

A

The energy required for a reaction

B

The disorder of a system

C

The speed at which a reaction will occur

D

The pH of a solution

Amino Acids and Proteins Q8

______________ is the process by which the information in DNA is transferred to RNA.

A

Translation

B

Replication

C

Transcription

D

Ubiquitination

Amino Acids and Proteins Q9

The strongest bonds that are present in biochemical compounds are ______________.

A

Ionic bonds

B

Covalent bonds

C

Hydrogen bonds

D

Van der Waals interactions

Amino Acids and Proteins Q10

A chiral compound ______________.

A

Is non-superimposable on its mirror image

B

Is the same as its mirror image

C

Is inorganic

D

Contains a sulfur atom

Amino Acids and Proteins Q11

A zwitterion ______________.

A

Has a positive charge

B

Has a negative charge

C

Overall, has no charge

D

All of the above

Amino Acids and Proteins Q12

All amino acids contain both a(n) ______________ and a(n) ______________ group.

A

Hydrogen, carbohydrate

B

Amine, carboxylic acid

C

Sulfur, amine

D

None of the above

Amino Acids and Proteins Q13

Essential amino acids:

A

Are made by organisms

B

Must be obtained from dietary sources

C

Are made from DNA

D

Include proline

Amino Acids and Proteins Q14

The first reaction of amino acid degradation is?

A

Deamination

B

Decarboxylation

C

Cyclization

D

None of the above

Amino Acids and Proteins Q15

The only amino acid without a chiral center is ______________.

A

Proline

B

Methionine

C

Alanine

D

Glycine

Amino Acids and Proteins Q16

There are ______________ common amino acids.

A

15

B

25

C

20

D

10

Amino Acids and Proteins Q17

______________ is the initiating amino acid of most newly synthesized proteins.

A

Proline

B

Alanine

C

Glycine

D

Methionine

Amino Acids and Proteins Q18

______________ is an example of a hydrophilic amino acid.

A

Lysine

B

Leucine

C

Methionine

D

Tryptophan

Amino Acids and Proteins Q19

______________ is an example of a hydrophobic amino acid.

A

Glutamic acid

B

Lysine

C

Arginine

D

Leucine

Amino Acids and Proteins Q20

Nonessential amino acids are:

A

Provided in the diet

B

Synthesized by mammals

C

Both A and B

D

None of the above

Amino Acids and Proteins Q21

A(n) ______________ is a short protein tag that attaches to and targets proteins for degradation.

A

Peptide

B

Ubiquitin

C

Alanine

D

Urea

Amino Acids and Proteins Q22

Protein secondary structures include:

A

Loops

B

alpha helices

C

beta sheets

D

All of the above

Amino Acids and Proteins Q23

Protein synthesis is carried out by ______________.

A

Mitochondria

B

Chromosomes

C

Ribosomes

D

Lysosomes

Amino Acids and Proteins Q24

The amino acid ______________ places certain constraints on the protein backbone.

A

Leucine

B

Alanine

C

Proline

D

Glycine

Amino Acids and Proteins Q25

The difference between a peptide and a protein is .

A

Length

B

Bond formation

C

Subunits

D

All of the above

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