BIOMOLECULES AND ENZYMES

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BIOLOGY

PROTEINS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which statements about the primary structure of a protein are correct? 1 It may be branched. 2 It is determined by the sequence of DNA bases. 3 It is unique to that protein. 4 It determines the tertiary structure of the protein.
A
A 1, 2 and 3
B
B 1, 2 and 4
C
C 1, 3 and 4
D
D 2, 3 and 4
Explanation: 

Detailed explanation-1: -Correct answer: The primary structure of a protein involves the amino acid sequence in the polypeptide chain. The amino acids in this chain are held together by peptide bonds.

Detailed explanation-2: -Answer and Explanation: The answer is c. it is usually branched.

Detailed explanation-3: -A protein’s primary structure is defined solely by its amino acid sequence, and is constructred by peptide bonds between adjacent amino acid residues. Secondary structure results from hydrogen bonding along the polypeptide backbone, resulting in alpha-helices and beta-pleated sheets.

Detailed explanation-4: -The primary structure of a protein necessarily linear (rather than branched) sequence of amino acids because it is able to coil and fold upon itself, resulting in 3D formations such as alpha helices and beta sheets.

There is 1 question to complete.
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