Biomolecules

Identify the correct statement among the following :

1. All naturally occurring amino acids except glycine contain one chiral centre.
2. Amino acid, cysteine can easily undergo dimerisation due to the presence of free SH group.
3. Glutamic acid is the only amino acid that contains a –COOH group at the side chain.
4. All naturally occurring amino acids are optically active.

A tetrapeptide, "x" on complete hydrolysis produced glycine (Gly), alanine (Ala), valine (Val), leucine (Leu) in equimolar proportion each. The number of tetrapeptides (sequences) possible involving each of these amino acids is:

1. 32
2. 24
3. 8
4. 16

Match List - I with List - II. Choose the correct answer from the options given below :

1. (A)-(II), (B)-(III), (C)-(I), (D)-(IV)
2. (A)-(III), (B)-(III), (C)-(I), (D)-(IV)
3. (A)-(IV), (B)-(I), (C)-(III), (D)-(II)
4. (A)-(IV), (B)-(I), (C)-(II), (D)-(III)

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

1. Statement I is true but Statement II is false
2. Both Statement I and Statement II are true
3. Statement I is false but Statement II is true
4. Both Statement I and Statement II are false

Match List-I with List-II. Choose the correct answer from the options given below :

1. (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
2. (A)-(I), (B)-(II), (C)-(III), (D)-(IV)
3. (A)-(II), (B)-(IV), (C)-(III), (D)-(I)
4. (A)-(IV), (B)-(II), (C)-(I), (D)-(III)

Identify correct conversion during acidic hydrolysis from the following : Choose the correct answer from the options given below :

1. (A), (B) and (C) only
2. (B), (C) and (D) only
3. (B), (C) and (E) only
4. (C), (D) and (E) only