Choose the answer for following questions: A. Which statement regarding collagen

Question

Choose the answer for following questions:

A. Which statement regarding collagen is most TRUE?

a. Collagen structure is based upon a coiled-coil.

b. Hydrogen bonds between collagen peptides occur between the lone pair on the peptide nitrogen and the hydrogen on the peptide carbonyl group.

c. The triple helix of collagen is stabilized through disulfide bonds.

d. Collagen contains Pro amino acids that are post-translationally modified.

B. Which arrow is pointing toward a peptide bond? a or b or c or d

C. Which of the following statements is most TRUE regarding the alpha helix of a protein in aqueous solution as represented by the hydropathy plot shown below?

a. it lies on the surface of the protein with the right side exposed to the solvent and the left side facing the interior of the protein

b. it lies on the surface of the protein with the left side exposed to the solvent and the right side facing the interior of the protein

c. it protrudes on the outside of the protein into the solvent

d. it lies buried in the interior of the protein

Explanation / Answer

Answere :

Question A : The correct option is (a) i.e. collegen structure is bases upon coiled-coil because collegen is a alpha helical coiled coil structure represented by supercoiled multistranded protein motif.

Question B : The arrow (a) represent the exact positioning of peptide bond i.e. CONH bonds between amino acids.

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