Biotechnology and its Applications — BIOLOGY STD 12 Science — Question

Name any two vertebrate body parts that are homologous to human forelimbs.

State the stage at which oogonia reach their maximum number.

Name any two sanctuaries in India.

Maturation of proinsulin into insulin takes place after:

1. Joining of c-peptide.
2. Addition of disulphide bridge.
3. Joining of c-peptide.
4. Maturation of proinsulin into insulin takes place after.

State the function of filiform apparatus found in mature embryo sac of an angiosperm.

Give an example for:
An organism of benthic zone

Mention the pollinating agent of an inflorescence of small dull-coloured flowers with well exposed stamens and large feathery stigmas. Give any one characteristic of pollen grains produced by such flowers.

Name any two industrially important enzymes.

Which one out of an intron and an exon is the reminiscent of antiquity?

State the principle on which ELISA works.