Environmental Issues — BIOLOGY STD 12 Science — Question

A3' ............ 5'B
C5’ ........... 3'D.
AB and CD represent two strands of a DNA molecule. When this molecule undergoes replication, forming a replication fork between A and C in the above.

1. Name the templete strand for replication.
2. Using which strand as the templete, will there be continuous synthesis of a complementary DNA strand
3. Complementary to which strand will okazaki segments get synthesised, discontinuous synthesis occurs.
4. What are templete strands and Okazaki pieces?
5. In which direction is a new strand synthesised?

i. Given below is a TS of an apple. Identify A, B, and C.

ii. Why is an apple categorised as a false fruit?

The ‘clown’ fish lives among the tentacles of sea anemone. What is this interaction between them called and why?

List any two economically important products for human obtained from Apis indica.

Why do people suffer from altitude sickness after reaching the high altitude regions? How does their body get acclimatized after a couple of days?

What is meant by the following:
Somatic hybrid.

Which fermentation conditions are necessary to be maintained during the production of biogas?

Explain broadly utilitarian argument for conservation of biodiversity.

Why T- DNA gene is harmful? How can we get benefit from it?