Assertion : Nucleotides are phosphate esters ofnucleosides.

Reason : The various nucleotides in nucleic acids are linked either through purine or pyrimidine bases.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false

• If both assertion and reason are false

An example ofa sulphur containing amino acid is :

• lysine

• serine

• cysteine

• tyrosine

Enzymes are

• fatty acids

• oils

• minerals

• proteins

The true statement regarding sucralose is:

• trichloro derivative of sucrose

• it does not provide calories

• it is stable at cooking temperature

• All of the above

Which of the following is not present in a nucleotide ?

• Cytosine

• Guanine

• Adenine

• Tyrosine

Assertion : Activity of an enzyme is pH-dependent.

Reason : Change in pH affects the solubility of the enzyme in water.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

Which of the following biomolecules contain non-transition metal ion ?

• Vitamin B₁₂

• Chlorophyll

• Haemoglobin

• Insulin

The sum of the number of primary alcoholic group present in open chain structure of glucose and fructose are:

• 4

• 5

• 3

• 2

The digestion of fat in intestines is aided by

• emulsification

• peptisation

• protection

• diffusion

There are 20 naturally occurring amino acids. The maximum number of tripeptides that can be obtained is :

• 8000

• 6470

• 7465

• 5360