List of top Biology Questions on Biomolecules

Given below are two statements:
Statement I: In prokaryotes, the positively charged DNA is held with some negatively charged proteins in a region called nucleoid.
Statement II: In eukaryotes, the negatively charged DNA is wrapped around the positively charged histone octamer to form nucleosome.
In the light of the above statements, choose the correct answer from the options given below :

Cellulose does not form blue colour with iodine because

Given below are two statements:

Statement I: Low temperature preserves the enzyme in a temporarily inactive state whereas high temperature destroys enzymatic activity because proteins are denatured by heat.
Statement II: When the inhibitor closely resembles the substrate in its molecular structure and inhibits the activity of the enzyme, it is known as competitive inhibitor.

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

Melonate inhibits the growth of pathogenic bacteria by inhibiting the activity of

Which stone secretes amino acids?

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

	List - I		List - II
(a)	Manganese	(i)	Activates the enzyme catalase
(b)	Magnesium	(ii)	Required for pollen germination
(c)	Boron	(iii)	Activates enzymes of respiration
(d)	Iron	(iv)	Functions in splitting of water during photosynthesis

Read the following statements on lipids and find out correct set of statements:

Lecithin found in the plasma membrane is a glycolipids
Saturated fatty acids possess one or more c = c bonds
Gingely oil has lower melting point, hence remains as oil in winter
Lipids are generally insoluble in water but soluble in some organic solvents
When fatty acid is esterified with glycerol, monoglycerides are formed.

Choose the correct answer from the options given below

A dehydration reaction links two glucose molecules to produce maltose. If the formula for glucose is \(\text{C}_6\text{H}_{12}\text{O}_6\) then what is the formula for maltose?

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

	List - I		List - II
(a)	Glycogen	(i)	Hormone
(b)	Globulin	(ii)	Biocatalyst
(c)	Steroids	(iii)	Antibody
(d)	Thrombin	(iv)	Storage product

Which one of the following enzyme bring about hydrolysis of lactose to glucose and galactose?

Which of the following RNAs is not required for the synthesis of protein

Match List - I with List - II.

	List - I		List - II
(a)	Protein	(i)	C=C double bonds
(b)	Unsaturated fatty acid	(ii)	Phosphodiester bonds
(c)	Nucleic acid	(iii)	Glycosidic bonds
(d)	Polysaccharide	(iv)	Peptide bonds

Choose the correct answer from the options given below.