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neet BIOLOGYMedium

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\alpha type and two subunits of β\beta type.)

A

Both Statement I and Statement II are true

B

Both Statement I and Statement II are false

C

Statement I is true but Statement II is false

D

Statement I is false but Statement II is true

Step-by-Step Solution

Statement I is false because in a protein chain, the left end is the N-terminal (amino group) and the right end is the C-terminal (carboxyl group). Statement II is true as adult human haemoglobin is a tetramer consisting of two α\alpha and two β\beta polypeptide chains.

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