C8-87/06
BOTANY
Paper-II
Time-Three Hours
Full Marks-300

Candidates should attempt Question No. 1 from Section-A and Question No. 5 from Section-B which are compulsory, and.any THREE of the
remaining questions, selecting
at least ONE from each Section.
Al/ questions carry equal marks.
SECTION-A
I. Write on any THREE of the following :-20x3=60

Apomixis


Chloroplast


B-Chromosomes
Transcriptional Enhancers.
2. Give an account of genetic code.
With suitable illustrations prove that genes are located on chromosomes.
How will you calculate distance between genes on chromosomes Illustrate your answer with suitable example. 20x3=60
(Contd.)
3. Give an account of signal transduction in Plants.
Briefly describe the procedure ofpedigree method of breeding. Discuss the achievements in Indian Agriculture. 20x3=60
What are molecular markers? Explain their uses in Crop Improvement.
4. Explain the method ofproduction and management of insect resistant transgenic crops.
Explain how Agrobacterium tumefaciens is used in genetic engineering.
Describe the Prophase-I of meiosis. 20x3=60

SECTION-B
5. Answer any THREE of the following in about 200 words each :-20x3=60

What is water potential Discuss Its various components.


,Discuss the mechanism of ATP synthesis in the light of chemiosmotic hypothesis.


Describe the salt-stress tolerance mechanism in halophytes.


Write an account on phytoremediation.


RHS---1l93 2 (Contd.)