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)

Identify the essential amino acids from below: Choose the correct answer from the options given below:

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

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

The carbohydrate "Ribose" present in DNA, is Choose the correct answer from the options given below:

1. A, D and E Only
2. B, D and E Only
3. A, C and D Only
4. A, B and E Only

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

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

The -Helix and - Pleated sheet structures of protein are associated with its :

1. tertiary structure
2. quaternary structure
3. primary structure
4. secondary structure

Which of the following acids is a vitamin ?

1. Saccharic acid
2. Ascorbic acid
3. Aspartic acid
4. Adipic acid

Identify the number of structure/s from the following which can be correlated to D-glyceraldehyde. [figure]

1. three
2. two
3. one
4. four

Total number of essential amino acid among the given list of amino acids is . Arginine, Phenylalanine, Aspartic acid, Cysteine, Histidine, Valine, Proline

The incorrect statement about Glucose is :

1. Glucose remains in multiple isomeric form in its aqueous solution
2. Glucose is soluble in water because of having aldehyde functional group
3. Glucose is an aldohexose
4. Glucose is one of the monomer unit in sucrose

[figure] The incorrect statement regarding the given structure is

1. can be oxidized to a dicarboxylic acid with Br2 water
2. despite the presence of -CHO does not give Schiff's test
3. will coexist in equilibrium with 2 other cyclic structures
4. has 4 asymmetric carbon atoms

The total number of carbon atoms present in tyrosine, an amino acid, is .

DNA molecule contains 4 bases whose structure are shown below. One of the structures is not correct, identify the incorrect base structure.

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

The incorrect statements regarding enzymes are : Choose the correct answer from the option given below :

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

Which of the following gives a positive test with ninhydrin ?

1. Polyvinyl chloride
2. Cellulose
3. Egg albumin
4. Starch

Coagulation of egg, on heating is because of :

1. Denaturation of protein occurs
2. Biological property of protein remains unchanged
3. Breaking of the peptide linkage in the primary structure of protein occurs
4. The secondary structure of protein remains unchanged

Which of the following is the correct structure of L-Glucose?

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

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

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

If one strand of a DNA has the sequence ATGCTTCA, sequence of the bases in complementary strand is :

1. CATTAGCT
2. TACGAAGT
3. ATGCGACT
4. GTACTTAC

The number of tripeptides formed by three different amino acids using each amino acid once is .

Match List I with List II

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

From the vitamins A, B1, B6, B12, C, D, E and K, the number of vitamins that can be stored in our body is .

Sugar which does not give reddish brown precipitate with Fehling's reagent, is :

1. Glucose
2. Sucrose
3. Lactose
4. Maltose

The total number of correct statements, regarding the nucleic acids is . A. RNA is regarded as the reserve of genetic information B. DNA molecule self-duplicates during cell division C. DNA synthesizes proteins in the cell D. The message for the synthesis of particular proteins is present in DNA E. Identical DNA strands are transferred to daughter cells.

Type of amino acids obtained by hydrolysis of proteins is :