Time: 3 Hrs.
Max. Marks:70
General instructions:
The question paper is divided into four sections.
- Section A:
Q. 1 contains Ten multiple choice type ofquestions, each carrying One marks.
i) For each multiple choice type of question, it is mandatory to write the correct answer along with its alphabet, e.g. (a)……/ (b)……./ (c)………etc.
ii)No marks shall be given, if ONLY the correct answer or the alphabet of correct answer is written. Only the first attempt will be considered for evaluation.
Q. 2 contains Eight very short answer type questions, each carrying one mark. - Section B:
Q. 3 to Q. 14 contain Twelve short answer type questions, each carryingTwo marks. (Attempt any Eight) - Section C:
Q. 15 to Q. 26 contain Twelve short answer type questions, each carrying Three marks. (Attempt any Eight) - Section D:
Q. 27 to Q. 31 contain Five long answer type questions, each carrying Four marks.(Attempt any Three). - Begin the answer of each section on a new page.
Section-A
Q.1. Select and write the correct answer for the following multiple choice questions: [10M]
i) The aquatic plant _____ is known as “Terror of Bengal”.
(a) Lotus
(b) Pistia
(c) Eichhornia
(d) Vallisneria
ii) A flower shows dull colour, strong fragrance and edible pollen grains. The type of pollination in
such flowers is______.
(a) Anemophily
(b) Chiropterophily
(c) Ornithophily
(d) Entomophily
iii) Part of the sperm containing enzymes for penetration of corona radiata is _____.
(a) tail
(b) middle part
(c) neck
(d) head
iv) In bird population of newly formed volcanic island, a rare allele of a gene was noted to be much
more prevalent than the populations of same species on the mainland. This is known as _______
effect.
(a) Founder
(b) Bohr
(c) Bottle neck
(d) Haldane
v) In a plant, deficiency symptom called ‘Die-back of shoots’ was observed. This can be rectified by
this element —
(a) Zinc
(b) sulphur
(c) iron
(d) copper
vi) Insect resistant property in cotton crop is developed by introducing a gene from ______.
(a) Bacillus thuringiensis
(b) Bacillus subtilis
(c) Bacillus Polymyxa
(d) Escherichia coli
vii) The type of interspecific interaction in which one species is harmed and other is not affected is
termed as _____.
(a) Commensalism
(b) Parasitism
(c) amensalism
(d) mutualism
viii) The small pores present on woody stem surface with bark and which carry out gaseous exchange are______.
(a) Stomata
(b) hydathode
(c) Ventricle
(d) lenticels
ix) In the. given food chain, if plants absorb 1000 Joules of light energy, then how much energy is
available for Lion?
Plants → Deer → Lion
(Producer) (Herbivore) (Carnivore)
(a) 10 Joules
(b) 100Joules
(c) 1000 Joules
(d) 0.1 Joule
x) Glucagon is secreted by ______ cells of pancreas.
(a) PP
(b) alpha
(c) delta
(d) beta
Q.2. Answer the following questions: [8M]
i) What is the effect of excessive transpiration in leaves?
ii) Which method of plant breeding can be used to obtain many genetically identical saplings of
endangered species?
iii) Define: Spermatogenesis.
iv) What is grand period of growth?
v) Write the anticodon of 5′ AUG 3′.
vi) Mention pollinating agent for maize flowers.
vii) Which is the first step in the process of absorption of water by roots from soil?
viii) Name the hormonal disorder caused due to hyperthyroidism in adults.
Section-B
Attempt any EIGHT of the following questions: [16M]
Q.3. Enlist any two domesticated species of honeybee and write their role in increasing crop yield.
Q.4. i. Name the vein which carries oxygenated blood.
ii. How does portal vein differ from normal vein?
Q.5. The health worker in hilly area will advise people to prevent which deficiency disease?
Which mcronutnent is deficient In the above area?
Q.6. Name the vector responsible for causing malaria and filariasis respectively.
Q.7. Name two chromosomal disorders which show presence of 47 chromosomes. Give their genotypes.
Q.8. Which germinal layer produces following structures?
i. Eustachian tube
ii. Pineal gland
iii. Middle ear
iv. Lining of middle ear
Q.9. Due to environmental change in area, the fillits were taking more time for ripening. Which gaseous
growth regulator can be suggested to fruit merchant? Give the source of the same in plants.
Q.10. Explain two-celled stage of pollen grain in angiosperms.
Q.11. What is the difference between Heterocatalytic and Autocatalytic function of DNA?
Q.12. What is Transpiration? How does it differ from guttation?
Q.13. Give reason:
When Rh —ve mother conceives Rh +ve foetus, then she is given injection of anti Rh antibodies.
Q.14. Identify the chromosomal aberrations:
i.
ii.
iii.
iv.
Section-C
Attempt any EIGHT of the following questions: [24]
Q.15. Complete the following table-
| Organ Region | Sympathetic effect | Parasympathetic effect | |
| i | Heart Beat | Increases | |
| ii | Blood vessels | Dilates | |
| iii | Arterial B.P. | Decreases | |
| iv | Pupil of eye | Constricts | |
| v | Gastrointestinal movements | Retards peristalsis | |
| vi | Urinary Bladder | Relaxes |
Q.16. i. Draw neat and labelled diagram to show T.S. of artery.
ii. Name two superficially placed arteries.
Q.17. Write any six characteristics of genetic code.
Q.18. i. In the process of rDNA technology, if two separate restriction enzymes are used to cut the
vector and donor DNA, then which problem will arise in the formation of rDNA or chimeric DNA. Explain.
ii. Name any two restriction enzymes and their source organisms.
Q.19. i. Explain vestigeal organs as evidence of evolution.
ii. Give any two examples of vestigeal organs in human beings.
Q.20. What is watcr potential?
Write any four factors affecting water absorption in plants.
Q.21. Draw the developmental flow chart in plant from seed germination to death of plant.
Q.22. Which element is mostly fixed by biofertilizer?
Write the benefits of biofertilizer.
Q.23. What is biofortification? Explain with respect to GM food plants.
Q.24. Differentiate between habitat and niche.
Q.25. What is decomposition?
Give diagrammatic representation of ‘ decomposition cycle. ‘
Q.26. What is biomagnification? Draw the flow chart and explain it with respect to DDT.
Section-D
Attempt any THREE of the following questions: [12M]
Q.27. i. What is the location of blind spot in human eye?
ii. Give importance of retina in image formation.
iii. Name the cells which function in dim light and day light.
iv. Which pigment is derived from vitamin A?
Q.28. With the help of a neat and labelled diagram, explain the conducting system of human heart.
Q.29. i. Explain incomplete dominance and codominance with suitable example.
ii. Show the genotype with the help of charts.
Q.30. i. Define: Siphonogamy.
ii. Differentiate between chalazogamy and porogamy with respect to the entry of the pollen tube.
iii. Draw a neat and labelled diagram to show mesogamy.
Q.31. i. Define: Infertility.
ii. If woman’s fallopian tube is blocked, which treatment can be given to overcome infertility?
Explain in brief.
iii. What is sperm bank?
