Human Reproduction — BIOLOGY STD 12 Science — Question

Write a short note on Adaptations of desert animals.

Heart Transplant.

What is ADA deficiency and how can it be cured?

What is Jhum cultivation?

What is pregnancy hormone? Why is it so called? Name two sources of this hormone in a human female.

1. One of the codons on mRNA IS AUG. Draw the structure of RNA adapter molecule for this codon.
2. Name the RNA polymerase that transcribes RNA in eukaryotes.
3. What is unique about the amino acid this RNA binds with?

Outline how restriction enzymes are used for removing sections of DNA from a chromosome.

In the metropolitan cities of India, many children are suffering from allergy/ asthma. What are the main causes of this problem. Give some symptoms of allergic reactions.

As a senior biology student you have been asked to demonstrate to the students of secondary level in your school, the procedure(s) that shall ensure cross-pollination in a hermaphrodite flower. List the different steps that you would suggest and provide reasons for each one of them.