UPSC IAS 2015 Question Paper for Botany Paper-II

C-AVZ-O-CPUB

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II
BOTANY
Paper—II

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Time Allowed : Three Hours Maximum Marks : 250

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QUESTION PAPER SPECIFIC INSTRUCTIONS
Please read each of the following instructions carefully before attempting questions :
There are EIGHT questions divided in Two Sections and printed both in HINDI and in ENGLISH.
Candidate has to attempt FIVE questions in all.
Question Nos. 1 and 5 are compulsory and out o f the remaining, THREE are to be attempted choosing at
least ONE from each Section.
The number o f marks carried by a question/part is indicated against it.
Answers must be written in the medium authorized in the Admission Certificate which must be stated clearly
on the cover of this Question-cum-Answer (QCA) Booklet in the space provided. No marks will be given
for answers written in a medium other than the authorized one.
Word limit in questions, wherever specified, should be adhered to.
Diagrams/Figures, wherever required, shall be drawn in the space provided for answering the question
itself.
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 o f the page left blank in the Question-cum-Answer
Booklet must be clearly struck off

C-AVZ-6-CPuB 1

U-S— 3T
SECTION—A

Q. 1 # TO: :—
Explain the following :— 10x5-50

Q. 1(a)

Mitochondria 10

Q. 1(b) 3flr srtcR

Extrinsic and Intrinsicproteins 10

Q, 1(c) srp p fto

Genetic code 10

Q. 1(d) M T 3TT3T

Hybrid vigour 10

Q. He)
Self-incompatibility. 10

Q. 2(a) so fter % #*r i

Distinguish between prokaryotic aiid eukaryotic cell. 15

Q. 2(b) *ter TTT ^xff I

Discuss briefly the evidence of organic evolution. 15

Q. 2(c)m u*l (#T ZJWFl) i

Describe briefly the various methods of gene transfer. 20

Q. 3(a) W Rf % yrptpf <$- ^ p n , « I
Describe the structure, behaviour and significance of special types of chromosomes. 15

Q. 3(b) ^ l k % ^TFr 3fU 3TR. ^T. T?. # W t ?
What is the role of RNA in the origin and evolution of livingorganisms ? 20
Q. 3(c) WcT f%FTt' WT^f W T ( t^ TOT t ^ ) ^ ^Tf8W ft^T 3^T

Describe the method of developing disease and insect resistant varieties through back
cross method of breeding crop varieties. 15

***

Q. 4(a) $ w w i
Describe the numerical variation in chromosomes. 15

Q. 4(b) W\ 3^T 3USHT W t ?
What is the biochemical and molecular basis of mutations ? 20

Q. 4(c) Tfr ^ I
Discuss briefly the mechanism of disease resistance. 15

SECTION—B
Q. 5 ftn fafcra :—
Explain the following :— 10x5=50

Q. 5(a)
ATP synthase 10

Q. 5(b)
Senescence 10

Q. 5(c) t< m
Conservation of biodiversity 10

Q. 5(d) m .w w j ( ^ s f t ) arrErrf^T
Species based mechanism of invasion 10

Q. 5(e) 3^rf ^ gWSTTTT I
Mainstream forms of renewable energy. 10

Q. 6(a) epr, f M r s ^ r ^ r ^ f ^ r «rt irq;, i
Describe the process of biological nitrogen fixation with special emphasis on denitrogenase.
15+5

Q. 6(b) ^ ^ 5^ Wfi VI wWf ^ ^ f^ TT |

Discuss the principal systems of environmental pollution and the reasons thereof. 15
q. 6(c) ^ 3 s r f tw r t ^ r-^ r^ f^ k (m ^W f^rcr)
¥T ^tfyTXT |
Describe different sub-mitochondrial complexes associated with electron transport chain
of aerobic respiration. 15

C-AVZ-O-CPt/B 3
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Q. 7(a) WTf 3 «TcT w ilii % ^ 5 ^ srfacTOTf ^ I
Enumerate the salient features of water relations in crop plants. 15

Q. 7(b) w f r % 3^ apjtoafr ^ w a rf^ rm # ft t ?
%3^r f^r w to r ^ t ?
What are the characteristics of phytochrome induced responses in flowering of higher
plants ? How do they control flowering ? 10+5

Q. 7(c) yr^fcto 3fk FRrf^F i *rrari^ cjrfW % ^ f^ n r
% ^ rf
Distinguish between natural and social forests. Discuss in detail the various objectives of
social forestry. 5+15

Q. 8(a) t f t . w r w f f 3 C 0 2 ^flT4far<*r % ?>T ^ ftT I
Describe the mechanism of C 0 2 fixation in CAM plants. 15

Q. 8(b) ^ttt ^ ^ rq ; i
Describe any four principal phytogeographical regions of India. 15

Q. 8(c) w i c=rmt' ^ i
Discuss the various advantages and limitations of phytoremediation. 20

C-frVZ-O-CPvS 4
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