Biomolecules

A D-aldotetrose on oxidation with concentrated HNO3 resulted in optically inactive dicarboxylic acid. The structure of the D-aldotetrose is:

1. [figure]
2. [figure]
3. [figure]
4. [figure]

Match List - I with List - II.

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

Identify the correct pair having amino acid (A) and the hormone (B) that is iodinated derivative of the amino acid (A). (T and Y represent one letter code for amino acids)

1. Amino acid (A) - T Hormone (B) - Insulin
2. Amino acid (A) - T Hormone (B) - Thyroxine
3. Amino acid (A) - Y Hormone (B) - Thyroxine
4. Amino acid (A) - Y Hormone (B) - Insulin

In the given pentapeptide, find out an essential amino acid (Y) and the sequence present in the pentapeptide : [figure] Choose the correct answer from the options given below :

1. arrayll(Y) & (Sequence) \ Serine & Thr-Ser-Asp-Ala-Gly array
2. arrayll(Y) & (Sequence) \ Serine & Ser-Asp-Thr-Ala-Gly array
3. arrayll(Y) & (Sequence) \ Threonine & Ser-Thr-Asp-Gly-Ala array
4. arrayll(Y) & (Sequence) \ Threonine & Thr-Ser-Asp-Gly-Ala array

Structures of four disaccharides are given below. Among the given disaccharides, the non-reducing sugar is :

1. [figure]
2. [figure]
3. [figure]
4. [figure]

The number of possible tripeptides formed involving alanine (ala), glycine (gly) and valine (val), where no amino acid has been used more than once is:

1. 8
2. 3
3. 4
4. 6

From the given following (A to D) cyclic structures, those which will not react with Tollens' reagent are: [figure]

1. A and D
2. A and B
3. B and D
4. B and C

Both human DNA and RNA are chiral molecules. The chirality in DNA and RNA arises due to the presence of

1. L-sugar component
2. D-sugar component
3. Chiral phosphate unit
4. Base unit

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

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

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

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