Biomolecules

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