Q21 / 200 · NEET 2023 (All India) · Botany

Given below are two statements:

Statement I: A protein is imagined as a line, the left end represented by first amino acid (C-terminal) and the right end represented by last amino acid (N-terminal).

Statement II: Adult human haemoglobin, consists of 4 subunits (two subunits of α type and two subunits of β type).

In the light of the above statements, choose the correct answer from the options given below:

  • Correct answer
    A
    Statement I is false but Statement II is true.
  • B
    Both Statement I and Statement II are true.
  • C
    Both Statement I and Statement II are false.
  • D
    Statement I is true but Statement II is false.

Solution

The sequence of amino acids constitutes the primary structure of the protein. The left end represented by the first amino acid and the right end represented by the last amino acid. The first amino acid is also called as N-terminal amino acid. The last amino acid is called the C-terminal amino acid.

Adult human haemoglobin consists of 4 subunits. Two of these are identical to each other. Hence, two subunits of α type and two subunits of β type together constitutes the human haemoglobin
(Hb).

Hence, the correct answer is option: 'A'.

Relevant Questions