IA-JGPT-M-ANS-BI
BOTANY
Paper-II

ITime Allowed: Three Hours I IMaximum Marks: 200 I
QUESTION PAPER SPECIFIC INSTRUCTIONS
Please read each of the following instructions carefully before attempting questions.
There are EIGHT questions in all, out of which FIVE are to be attempted.

Question no. 1 and 5 are compulsory. Out of the remaining SIX questions, THREE are to be attempted
selecting at least ONE question from each of the two Sections A and B.
Attempts of questions shall be counted in chronological order. Unless struck off, attempt of a question shall


be counted even if attempted partly. Any page or portion of the page left blank in the answer book must
be clearly struck off.
All questions carry equal marks. The number of marks carried by a question part is indicated against it.
Answers must be written in ENGLISH only.
Neat sketches may be drawn, wherever required.

SECTION-A
Q.1. Write short notes on each of the following 8x5=40
Q. Freeze-fracture technique 8
Q. Heterosis 8
Q. Extrinsic and Intrinsic proteins 8
Q. test 8
Q. Ultrastructure of Golgi apparatus and its chemical constituents 8

Q. What is the role of cytoplasm in inheritance? Briefly describe the genetics of cytoplasmic male sterility. 5+15=20
Q. How does the InsP3/DAG pathway participate in the process of cellular signal transduction? 20

Q. Compare the behaviour and significance of Polytene chromosome with those of Lampbrush chromosome. 10+10=20
Q. Compare between different types of Restriction endonucleases. How do they help in gene cloning 10+10=20


Q. 4(a)Describe the structure and functions of endoplasmic reticulum. 10+10=20
Q. What are the changes that occur in newly synthesized RNA prior to participation in translation? 20

SECTION-B
Q.5. Write short notes on each of the following: 8x5=40
ATP synthase
Senescence
Endangered species
Apoenzyme
Phytochrome

Q. Describe the process of biological nitrogen fixation with special emphasis on the Dinitrogenase.
Q. How do the plastoquinone and plastocyanine carry electrons between photosystem II and I
Explain the herbicidal blockage in photosynthetic electron flow. 10+10=20

Q. What are the characteristics of Phytochrome-induced responses in flowering of higher plants
and how do they control flowering 10+10=20
Q. Describe the role of Rubisco in Carbon cycle. 20

Q.8(a)Distinguish between Natural forest and Social forest. Categorically mention the objectives of Social forestry. 10+10=20
Q. 8(b)Name the principal phytogeographical regions of India and describe any four of them. 5+15=20