Which of the following is not required for any of the techniques of DNA fingerprinting available at present?

• Zinc finger analysis

• Restriction enzymes

• DNA-DNA hybridization

• DNA-DNA hybridization

Which of the following is the most important cause of animals and plants being driven to extinction?

• Alien species invasion

• Habitat loss and fragmentation

• Co-extinctions

• Co-extinctions

Pick out the correct statement.

I. Haemophilia is a sex-linked recessive disease
II. Down's syndrn=me is due to aneuploidy
III. Phenylketonuria is an autosomal recessive gene disorderIv. Sickle cell anaemia is an X-linked recessive gene disorder

• II and IV are correct

• I, III and IV are correct

• I, II and III are correct

• I, II and III are correct

The coconut water from tender coconut represents

• fleshy mesocarp

• free-nuclear proembryo

• free-nuclear endosperm

• free-nuclear endosperm

Asthma may be attributed to

• allergic reaction of the mast cells in the lungs

• inflammation of the trachea

• accumulation of fluid in the lungs

• accumulation of fluid in the lungs

Select the incorrect statement

• LH and FSH triggers ovulation in ovary

• LH and FSH decrease gradually during the follicular phase

• LH triggers secretion of androgens from the Leydig cells

• LH triggers secretion of androgens from the Leydig cells

Which is the National Aquatic Animal of India?

• River dolphin

• Blue whale

• Sea-horse

• Sea-horse

Joint Forest management Concept was introduced in India during

• 1970s

• 1980s

• 1990s

• 1990s

Which of the following is not a feature of the plasmids?

• Circular structure

• Transferable

• Single stranded

• Single stranded

The two polypeptides of human insulin are linked together by

• phosphodiester bonds

• covalent bonds

• disulphide bridges

• disulphide bridges