Molecular Basis of Inheritance — BIOLOGY STD 12 Science — Question

State the functions of primary and secondary lymphoid organs in humans.

Name the two special types of lymphocytes in humans. How do they differ in their roles in immune response?

Do you think that the alternate splicing of exons may enable a structural gene to code for several isoproteins from one and the same gene? If yes, how? If not, why so?

Name the group of cells, the HIV enters after getting into a human body. What happens in these cells and what are these cells subsequently referred to as? Name the next group of cells, the HIV attacks from there.

State the types of acquired immunity?

Name the fluid which protects an embryo.

Give examples to prove that microbes release gases during metabolism.

Can you think of a situation where we deliberately want to make a species extinct? How would you justify it?

(a) Name the causative agent of typhoid in humans.
(b) Name the test administered to confirm the diseases.
(c) How does the pathogen gain entry into the human body? Write the diagnostic symptoms and mention the body organ that gets affected in severe cases.

Mark the odd one the following groups.
Luteinizing hormone, Progesterone, Chorionic gonadotropin, Estrogen.