AHSEC| CLASS 12| BIOLOGY| QUESTION PAPER - 2017| H.S. 2ND YEAR
2017
BIOLOGY
(Theory)
Full Marks: 70
Pass Marks: 21
Time: Three hours
The figures in the margin indicate
full marks for the questions.
|
PART-I (BOTANY) MARKS – 35 PART-II (ZOOLOGY) MARKS - 35 |
Use separate Answer scripts for
Part-I (Botany) and Part-II (Zoology)
Part-I (Botany)
1. Who is regarded as the father of green revolution? 1
2. The pollination done by snails is called ………... 1
3. What is GMO? 1
4. Name the bacterium which was controlled with penicillin
by Alexander Flemming. 1
5. What are the disadvantages of asexual reproduction? 2
Or
Define
parthenogenesis. Give an example of natural parthenocarpic fruit. 1+1=2
6. What is biofortification? What are the objectives of it?
1+1=2
Or
What is
selection? Name two methods of selection. 1+1=2
7. What is transgenic plant? Give two examples. 1+0.5+0.5=2
Or
What is recombinant
DNA? How does enzyme endonuclease help its formation? 1+1=2
8. Give the full form of ELISA. Name two diseases for the
detection of which ELISA technique is used. 1+0.5+0.5=2
Or
What is EcoR1?
1+1=2
9. Write short note on: (any one) 2
(a) Biopiracy
(b) Gene Cloning
10. How insulin is produced through genetic engineering? 2
Or
Explain Gene therapy
by citing the example of Adenosine deaminase (ADA) deficiency. 2
11. Describe the process of development of male gametophyte
in Angiosperms with suitable diagrams. 3
Or
What are the
advantages of cross pollination? 3
12. What do you mean by GEAC? How it controls the genetic
engineering research? 1+2=3
Or
What is the full
form of PCR? How amplification of DNA is
done by sing PCR? 3
13. Describe the application of microbes in sewage
treatment. 3
Or
State the
utility of the following plants and mention their scientific name. 1+1+1=3
(a) Indian
Ginseng (Ashwagandha)
(b) Neem
(c) Hill teak
(Gamari)
14. Describe the facts on which Darwinian theory is based
upon. 5
Or
Describe the
factors involved in the process of organic evolution. 5
15. Write a note on abiotic factors influencing the growth
and development of plants. 5
Or
What is tissue
culture? How it has helped us in crop improvement? 5
Part-II (Zoology)
1. Fill in the blanks: (any two) 1x2=2
(a) The primary
food plant of Eri silkworm is _________.
(b) Animals that
have had their DNA manipulated to express an extra (foreign) gene are known as
________animals.
(c) The process of
release of ovum from a mature follicle is called ______.
(d) Group of individuals
in a well-defined geographical area, share or compete for similar resources,
potentially interbred, constitute _______.
2. Answer any two: 1x2=2
(a) What substances
are present in birth control pills?
(b) Which sex
chromosome is present only in male (man)?
(c) Write the
equation of ‘Verhulst-Pearl logistic growth’ of population.
(d) Why genetic
code is said to ‘degenerate’?
3. Answer any four of the following: 2x4=8
(a) Write the
locations of Untranslated regions (UTR) in mRNA and state its function.
(b) How seminal
plasma is formed? Write one function of seminal plasma.
(c) Write how
sex is determined in man.
(d) Describe
briefly the structure of nucleosome.
(e) What is auto
immune disease? Give one example.
(f) Name the
disease of silkworm caused by protozoan parasite. Mention the preventive
measures against this disease.
4. State the differences between: (any two) 2x2=4
(a) DNA and RNA
(b) Acquired and
Innate immunity
(c) Production
and decomposition
(d) Klinefelter
syndrome and turner syndrome.
5. Draw a labelled diagram of molecular structure of human
foetus in the uterus. 3
Or
Draw a label
diagram of molecular structure of antibody. 3
6. Write briefly the importance of bee keeping. 3
Or
Why should we
conserve biodiversity? 3
7. A child has blood group. O. If the father has blood group
A and mother blood group is B; Write the genotypes of parents and possible
genotypes of other offsprings. 3
Or
Explain co-dominance
with example. 3
8. What is the infective stage of malarial parasite?
Describe the life cycle of malarial parasite in brief. 1+4=5
Or
What are the probable
causes of cancer? Write briefly on its detection and diagnosis. 2+1.5+1.5=5
9. What are the different stages of gene regulation? Explain
the Lac-Operon model of transcriptional regularation. 2+3=5
Or
Explain the
southern blot hybridization technique of DNA finger printing. 5
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