NEET Zoology Proteins MCQ Question
Which combination of statements about protein structure is correct?
Tertiary structure is the 3-dimensional arrangement of a protein. 2) Proteins are only formed in a linear sequence. 3) Right-handed helices are observed in proteins.
The first amino acid in a protein is the C-terminal amino acid. 2) Only right-handed helices are present in proteins. 3) Tertiary structure does not involve folding.
Proteins can have secondary structures like helices and sheets. 2) The N-terminal amino acid is always last in the sequence. 3) Tertiary structure is essential for protein function.
Proteins are always rigid and do not fold. 2) Tertiary structure is formed by interactions within the protein chain. 3) Some proteins are structural, while others are enzymes.
Correct Answer
Detailed Explanation
Option A correctly states that tertiary structure is the 3-dimensional arrangement of a protein, that proteins can exhibit right-handed helices, and it is incorrect to say proteins are only formed in a linear sequence. The other options contain inaccuracies regarding amino acid positions and the nature of protein folding.
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