Question

The type of bonding that maintains the secondary structure in a protein is the

A) Hydrogen bonds between the carbonyl and amino groups of the backbone

B) Covalent bond between the carbonyl and amino groups of the amino acids

C) Hydrogen bonds between two amino acids

D) Disulfide bonds that hold two polypeptide chains together

E) Hydrogen bonds between two amino groups

Answer 1

Option A is the correct one

A) Hydrogen bonds between the carbonyl and amino groups of the backbone

secondary structure is alpha helical structure coilled back bone structure of amino acids

and is stabilized by hydrogen bond of an amino group of one amino acid in chain with carbonyl group of other amino acid

other answers are wrong

B) Covalent bond between the carbonyl and amino groups of the amino acids

the are responsible for primary liner structure of chain of amino acids

C) Hydrogen bonds between two amino acids

amino acids are no separated in secondary structure the are linked in polypeptide chain

so more correct answer is A

D) Disulfide bonds that hold two polypeptide chains together

it is for tirtiary and quaternary structures of protein not for secondary

E) Hydrogen bonds between two amino groups

when amino groups are in chain they do not show hydrogen bonds