28T BIOL (BOT-ZOO) (N)

2018

BIOLOGY (Theory)

Full Marks : 70

Pa s Marks : 21

Time : Three hours

fi ur s in the margin indicate full marks for the questions.

PART-I (BOTANY)

MARKS - 35

Page No. 1 - 8

I I~ PART-II (ZOOLOGY)

MARKS - 35

Page No. 9 - 15

U p rate Answer scripts for Part-I (Botany) and Part-II (Zoology)

Contd.

Part-I (Botany)

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1 Whnt is n1ean1 by Clone '> 1

2. Define the term Apomb<is 1

3. How the ages of fossils are calculated ? 1

4. Write the scientific name of the microorganism used to produce

ethanol. 1

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28T BIOL (BOT-ZOO) (N) l 2 ]

5. What is Triple Fusion? Name the nuclei involved ,n triple fusion

2

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Explain any two outbreeding devices that flowering plants have!

developed to encourage Cross Pollination.

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6 Mention four objectives for improving the nutritional quality of crops

by the process of biofortification 2

28T BIOL (BOT-ZOO) (N) I 3 1 Contrl

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\ Vh t I t tiµ t n y of th II ? Whl t is thC' ,mpor lanco of totipotency

in Plant ci nc ?

7. Write a brief not on Biochemical Oxygen Demand. 2

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What are Antibiotics ? Name two microorganisms used to produce

antibiotics.

8. How the insecticidal proteins act on Pest ? 2

28T BIOL (BOT-ZOO) (N) [ 4]

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a)

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(b)

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(C)

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(b) Kalmegh

(C) Bahak tlta.

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Write a note on adaptation of plants 10 water scarcity.

13. Discuss the methods of breeding for disease resistance crops.

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What do genetically modified organisms (GMO) do to the food ? How

do they useful to us ?

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28T BIOL (BOT-ZOO) (N) [ 7] Contd

Part-II (Zoology)

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1. Fill in the blanks (any two)

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1x2=2

(a) cells present in mammalian testes help to nourish

sperm.

(b) The genes located in Y chromosome are called ___ _

(c) The major reservoir of carbon on earth 1s

(d) Typhoid fev r can be confirmed by ____ te t

28T BIOL (BOT-ZOO) (N) [ 9] Contd

2. Answer any two :

(a) Why sperm contain mitochondria ?

(b) What are Okazaki fragments ?

(c) What are the two basic amino acids which are found in high amount in histone protein ?

(d) What is transgenic organism?

3. Answer any four :

(a) Describe the formation of Placenta during pregnancy

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28T BIOL (BOT-ZOO} (N) [ 10]

(b) Why coacervates were called primitive cell?

(c) Write the applications of DNA fingerprinting.

(d) What is Amniocentesis? Why does amniocentesis is ban ed?

(e) Define chromosomal theory of inheritance.

(f) What is Red Data Book ? Which endemic animal of ss m s

presently listed in Red Data Book ?

28T BIOL (BOT-ZOO) (N) l 11 1 nr

4. Write differences between . (any two)

( a) Homologous organ and analogous organ

(b) Linkage and crossing over

(c) In-situ conservation and Ex-situ conservation

(d) Plasmid DNA and Chromosomal DNA.

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2x2=4

5. Express diagrammatically the various phases of spermatogenesis.

28T BIOL (BOT-ZOO) (N) [ 12]

3