Biomolecules

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

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

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]

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

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

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

Type of amino acids obtained by hydrolysis of proteins is :

Two nucleotides are joined together by a linkage known as :

1. Phosphodiester linkage
2. Glycosidic linkage
3. Disulphide linkage
4. Peptide linkage

Which structure of protein remains intact after coagulation of egg white on boiling?

1. Quaternary
2. Primary
3. Secondary
4. Tertiary