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= mv BJKE-B-BTN
INDIAN FOREST SERVICE (HiAINJEXAM- 2023
BOTANY
PAPER—II
Time Allowed : Three Hours Maximum Marks : 200
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 Nos. 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 sequential 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 Question-cum-Answer Booklet must be clearly struck off.
All questions carry equal marks. The number of marks carried by a question/part is
indicated against it.
Neat sketches may be drawn, wherever required.
Answers must be written in ENGLISH only.
BJKE-B-BTN/41 1 [ P.T.O.
SECTION—A
1. Write short notes on the following : 8x5=40
(a) Nuclear pore complex
(b) Microtubule binding proteins
(c) Substitution mutation
(d) Functions of ribosomes and subunits
(e) Nuclear male sterile lines for hybrid seed production
2. (a) What are the processes of membrane transport? How do carrier molecules
transport materials across a cell membrane? 10+10=20
(b) Explain extranuclear inheritance citing examples from two different
organelles. 10
(c) What are the different stages involved in micropropagation? 10
3. (a) Describe the mechanism of meiotic crossing-over and the theories related to
the process. 20
(b) “Mitochondria are semi-autonomous organelles.” Justify. 16
(c) What are cell cycle regulators? Discuss their different types. Why are these
important? 5+3+2=10
4. (च Give a detailed account of direct gene transfer methods. 20
(b) Is heterochromatin genetically inactive? Explain. Discuss the function and
features of heterochromatin. 5+5=10
(© Give the difference between dominance and epistasis. Explain different kinds
of epistatic interactions. 3+7=10
BJKE-B-BTN/41 "` 2
SECTION—B
5. Write short notes on the following : 8x5=40
(જ Effects of global warming
(૭) Ztest
(c) Red Data Book
(व) Heat shock proteins and their functions
(૭ GS-GOGAT pathway
6. (a) Describe different types of biogeochemical cycles. Discuss their importance.
15+5=20
(b) Describe the key features of enzyme active sites. 10
(c) What are the different types and attributes of biodiversity? Discuss various
causes for the loss of biodiversity. 5+5=10
7. (a) Explain CO, concentrating mechanisms in plants. What are the benefits of
CO, concentrating mechanisms? 15+5=20
(b) Discuss various hot spots of diversity and their role in conservation. 10
(જ Discuss probability and the types of probability distributions. 10
8. (a) (i) Describe phytochrome and its involvement in the photoperiodic induction
of flowering in plants. 10
8 Describe the molecular basis of vernalization. 10
(b) Write a detailed note on the Convention on Biological Diversity. 10
(c) Give the key features of chemiosmotic theory. 10
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BJKE-B-BTN/41 3 SB24—138
