Starch gives blue colour with iodine because of

(1)It exists in globular form

(2)I₂ gets hold in helical form

(3)It has blue colour pigment

(4)All of the above

Cellulose is present in

(1)cotton fibres

(2)Paper

(3)Cell wall of plants

(4)All of these

Which of the following is not true about secondary metabolites?

(1)They have direct role in photosynthesis, respiration and reproduction

(2)They act as toxins or pigments or drugs or lectins

(3) Distribution is limited and restricted to special taxonomic group

(4) Organic compound of diverse nature

Which of the following is not a strict macromolecules?

(1)Carbohydrates

(2)Nucleic acids

(3)Proteins

(4)Lipids

The number of correct statements amongst the given statements is:

I. Amino acids are substitute methanes.

II. The R group in serine is hydroxyl-methyl.

III. Arachidonic acid has 20 carbon atoms including the carboxyl carbon.

IV. Glycerol is trihydroxypropane.

V. Lecithin is a phospholipid.

 1.  2     

 2.  3

 3.  4   

 4.  5

The following diagram shows the molecular structure of:

 1. A hexose sugar

 2. An aromatic amino acid

 3. A nitrogenous base found in RNA

 4. An important constituent of a DNA nucleotide.

Which of the following is present as a store house of energy in animal tissues?

(1)Cellulose

(2)Sucrose

(3)Glycogen

(4)Starch

Which of the following is the most abundant protein in the whole of the biosphere?

(1)Collagen

(2)Albumin

(3)RUBISCO

(4)Antibody

Which of the following is not the function of protein

(1)Act as hormones

(2)act as enzymes

(3)act as genetic material

(4)fight against infections

The body meets the demand of essential amino acids through

(1) Food

(2) Body synthesised  on its own

(3) Both A and B

(4) None of these