Paper-II
Section A

Write short notes on any four of the following in about 150 words each:

Non-green plastids

Stages of cell cycle

Y-chromosome

Drawinism

Correlation

Answer the following questions

With suitable sketches, distinguish between the major types of cell surface receptors

Explain in detail the structure of G protein and its role in signal transduction

Answer the following questions

Discuss the principles of the double-helix structure of DNA proposed by Watson and Crick, and compare with that of ‘Z-DNA’

Explain different types of DNA replication in prokaryotes

Answer the following questions

Evaluate the different gene transfer techniques for the production of transgenic plants

Enumerate the types of selectable marker genes employed in developing transgenic plants

Section B

Write short notes on any four of the following in about 150 words each

Hydroponics

Nitrogenase

Dormancy

Endemism

Xerosere

Answer the following questions

Describe the biochemical process by which two molecules of ATP are produced from one molecule of glucose. Mention the names of the participating enzymes

Discuss the role of motochondrion for pyruvic acid oxidation

Answer the following questions

What are the physiological changes associated with plant senescence? Add a note on senescence retarding hormones

Enumerate the ethylene inducded responses in plants. What are the commercial uses of enthylene

Answer the following questions

Discuss the causes and consequences of global warming

What is the significance of ozone layer? What are the contributing factors for its depletion and what can be the possible consequences