Molecular Basis of Inheritance — BIOLOGY STD 12 Science — Question

Write the name of the bacterial product modified by genetic engineering which is used in 'clot dissolution' i.e. removal of clot from the blood vessels of a patient undergoing myocardial infarction leading to heart attack.

Name the blank spaces a, b, c and d given in the following table:

Type of Microbe	Name	Commercial Product
Bacterium Fungus	a	Lactic acid
Fungus	b	Cyclosporin A
c	Monascus purpureus	Statin
Fungus	Penicillium notatum	d

Give an example of a plant which came into India as a contaminant and is a cause of pollen allergy.

How does dsRNA gain entry into eukaryotic cell to cause RNA interference?

Name two diseases whose spread can be controlled by the eradication of Aedes mosquitoes.

Give two examples of passive immunity.

The following statements (i), (ii) and (iii) seem to describe the water-pollinated submerged plants. Which one of these statements is incorrect?

1. The flowers do not produce nectar.
2. The pollen grains have mucilaginous covering.
3. The brightly-coloured female flowers have long stalks to reach the surface.

When and why do some animals like snails go into aestivation?

What features of flowers facilitate pollination by birds?

Give scientific name of two helminthes that are pathogenic to man.