Which one of the following combinations is incorrect?

• Rio convention - Air pollution

• Kyoto protocol - Climate change

• Montreal protocol - Ozone depletion

• Ramsar convention - Wetland conservation

Lactose (Lac) operon is regulated by

• lac repressor only

• lac repressor and CAP-cGMP complex

• lac repressor and CAP-cAMP complex

• CAP-cAMP and CAP-cGMP complex

Endosperm nucleus is

• n

• 2n

• 3n

• 4n

Stock and scion are used in

• cutting

• grafting

• layering

• micropropagation

105.

Gene therapy has been successful in curing Codes genetic diseases in laboratory animals through

• exposure to X-ray to rectify the defective gene

• replacing the defective gene with a functional gene

• oral delivery of genes

• use of therapeutic medicines to rectify the defective gene

The enzyme peptidyl transferase of prokaryotes resides in

• 50 S ribosome

• 30 S ribosome

• 40 S ribosome

• 60 S ribosome

The tRNA anticodon 3'-UAC-5' will pair with the mRNA codon

• 5'-AUU-3'

• 5'-UAC-3'

• 5'-AUG-3'

• 3'-GUA-5'

Match the items in column I with those in column II and choose the correct answer.

• A- 4; B- 3; C- 1; D- 2

• A- 3; B- 4; C- 1; D- 2

• A- 4; B- 2; C- 1; D- 3

• A- 2; B- 1; C- 3; D- 4

A male rabbit of genotype 'AABBDDEE' is crossed with a female rabbit of genotype 'aabbddee' to produce F₁ hybrid offspring. How many genetically different gametes can be produced by this F₁ hybrid?

• 4

• 8

• 16

• 32

Match the following column I with column II.

• A- 2; B- 1; C- 3; D- 4

• A- 4; B- 2; C- 1; D- 3

• A- 1; B- 2; C- 3; D- 4

• A- 3; B- 1; C- 2; D- 4