Biochemistry

Question: If the F and Y angles of each peptide unit in a protein are known, which of the following may also be determined?
[A].

Complete secondary structure

[B].

Complete tertiary structure

[C].

Complete quaternary structure

[D].

Thermodynamic stability

Answer: Option A

Explanation:

No answer description available for this question.

Question: In β-pleated sheet structures neighbouring
[A].

chains lie in a flat plane

[B].

neighboring residues are hydrogen bonded

[C].

neighboring chains are connected by a-helices

[D].

neighboring chains are hydrogen bonded

Answer: Option D

Explanation:

No answer description available for this question.

Question: Hemoglobin has quaternary structure and is made up of
[A].

six polypeptide chains, two α-chains and four β-chains

[B].

two polypeptide chains, one α-chains and one β-chains

[C].

four polypeptide chains, two α-chains and two β-chains

[D].

five polypeptide chains, two α-chains and three β-chains

Answer: Option C

Explanation:

No answer description available for this question.

Question: In the β-pleated sheet
[A].

hydrogen bonds are formed between the peptide bonds

[B].

adjacent polypeptide chains can either be parallel or antiparallel

[C].

the polypeptide chain is fully extended

[D].

all of the above

Answer: Option D

Explanation:

No answer description available for this question.

Question: Which of the following statements is incorrect?
[A].

Protein G contains both a-helix and P-sheet

[B].

Protein G contains only a-helix

[C].

Fatty acid binding protein contains largely P-sheet

[D].

Hemoglobin contains four sub-units

Answer: Option B

Explanation:

No answer description available for this question.

Question: Disulfide bonds most often stabilize the native structure of
[A].

extracellular proteins

[B].

dimeric proteins

[C].

hydrophobic proteins

[D].

intracellular proteins

Answer: Option A

Explanation:

No answer description available for this question.

Question: An oil drop with a polar coat is a metaphor referring to the three dimensional structure of
[A].

fibrous proteins

[B].

collagen

[C].

globular proteins

[D].

silk protein

Answer: Option C

Explanation:

No answer description available for this question.