Which of the characteristics of collagen structure listed below contrubute to the tensi le strength of collagen?
I.Collagen is made up of a triplet helix where 3 left-handed helices twist together in a right handed sense.
II.Collagen includes at repeating sequence of amino acids with glycine every 3 amino acids in a helix with about 3 amino acids per turn.
III.The three left-handed helices are staggered to allow close packing between glycine residues and rigidity from the bulky and inflexible proline/hydroxyproline.
A)I
B)I and II
C)I, II, and III
D)II and III
E)I and III

Question

Quizplus · Accepted Answer

The triplet helix structure of collagen (I) allows for close packing between glycine residues and rigidity from bulky and inflexible proline/hydroxyproline residues (III). Additionally, the repeating sequence of amino acids with glycine every 3 amino acids (II) allows for the formation of a tightly packed helix. These characteristics contribute to the tensile strength of collagen.

Which of the Characteristics of Collagen Structure Listed Below Contrubute