Molecular Basis of Inheritance — BIOLOGY STD 12 Science — Question

Explain the process of secondary treatment given to the primary effluent up to the point it shows significant change in the level of biological oxygen demand (BOD) in it.

Give three important aspects of Biodiversity.

Condoms are the most popular contraceptive devices, used by human males. Give reasons.

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?

Which species of Penicillium produces roquefort cheese?

A patient who has undergone an organ transplant is put on immunosuppressant. Name the immunosuppressant and its source organism.

Why is Agrobacterium-mediated genetic transformation described as natural genetic engineering in plants?

A low level of expression of lac operon occurs at all the time. Can you explain the logic behind this phenomena.

What do you understand by the term endangered species? Name three categories of endangered species and name at least two animal species of India which are in danger of extinction?###Define the endangered species with example.