I 1.
Mark the correct statements out of the following:
A. Complete autogamy is rather rare in Chasmogamous flowers
B. Embryogeny are similar in both monocotyledons and dicotyledons
C. A typical anther is tetragonal and tetrasporangiate
D. The transformation of ovules into seeds and ovary into fruit proceed simultaneously
a) A.B.D b) A,B,C,D c) B,C,D d) A,C,D
2. Scrotum helps in maintaining the temperature of testes which is A lower than the normal
temperature. Each of testes has about B compartments and measures C cm in length.
Select the option that fills the blanks correctly
A B C
a 2 – 2.50C 250 4-5
b 3 – 3.50C 300 2 -3
c 2 - 2.50C 250 4-6
d 2 – 2.50C 250 2-3
3. Eliminate the odd pair from the options given below
a) Labia minora – Paired folds of tissue under the labia majora
b) Clitoris – Lies at the upper junction of the two labia minora
c) Clitoris - Lies above the urethral opening
d) Clitoris - Lies at the upper junction of the two labia majora
4. Statement I : Contraceptives are not regular requirements for the maintenance of reproductive
health
Statement II : One is forced to use these methods either to prevent pregnancy or to delay or space
pregnancy due to personal reasons
a) Both statements are correct
b) Both statements are wrong
c) Statement I is wrong
d) Statement II is wrong
5. If one parent has Sickle cell anemia and the other has Sickle cell trait, there is ____ that their
children will have Sickle cell anemia and ____ will have Sickle cell trait.
a) 25% risk, 75% risk b) 50% risk, 100% risk c) 75% risk, 25% d) 50% risk, 50% risk
6. Identify the INCORRECT statements :
A. The DNA fingerprinting is same for monozygotic twins.
B. In bacteria, transcription and translation take place in the same compartment.
C. The secondary structure of tRNA molecule looks like inverted ‘L’ shape.
D. The ribosome in its active site, exists as large subunit and a small subunit.
a) A,C b) A, B, C c) B, C, D d) B, C
7. Identify the CORRECT statements:
A. RNA is the genetic material in QB bacteriophage.
B. 23 S rRNA in bacteria acts as ribozyme.
C. The UTR’S are present at both 5’ – end and at 3’ – end.
D. In density gradient centrifugation, satellite DNA forms many major peaks.
a) A, D b) A, B, C c) B, C d)A, B, D
8. Which of the following is not true about Big Bang theory?
a) A singular huge explosion
b) Universe expanded and temperature came down
c) Hydrogen and Helium formed along this explosion
d) Hydrogen and Helium formed sometime later
9. Find out the mismatch pair:
a) Cretaceous period – Horsetails
b) Silurian period - Zosterophyllum
c) Jurassic period - Ginkgos
d) Permian period - Arborescent lycopods
10. The diagnosis of cause of allergy is done by:
a) Injection of very small doses of possible allergens
b) Injection of high doses of possible of allergens
c) Injection of very small doses of adrenalin
d) Injection of high doses of adrenalin
11. The varieties of cheese are not known by their
a) Characteristic texture, flavor, taste
b) Characteristic texture, flavor
c) Characteristic shape and texture
d) The specificity coming from microbes used
12. Recombinant DNA molecule can be created normally by cutting the vector DNA and source DNA
respectively with:
a) Hind II, Hind II b) Hind II, EcoRI c) Hind II, BamHI d) Hind II, AluI
13. Tailor made plants will supply which of the following alternative resources to industries
a) Golden rice, starches, pesticides
b) Starches, fuels , pesticides
c) Golden rice , starches, fuels
d) Starches , fuels, pharmaceuticals
14. The ‘ r’ value of flour beetle is _____
a) 0.12 b) 0.015 c) 0.0205 d) None of these
15. The threat of extinction is least for which of the following groups
a) mammals b) birds c) amphibians d) gymnosperms
II Fill up the blanks: ( Spleen, 60, 40, recombination , Hind II, Pyramid of energy )
16. Atleast ______ percent sperms must show vigorous motility.
17. Generation of non parental gene combinations is due to ______ .
18. ________ acts as a filter of the blood by trapping blood borne microorganisms.
19. The first restriction endonuclease is _______ .
20. ________ is always upright.
III ANSWER ANY FIVE :
21. How pollination takes place in marine sea grasses?
22. Theoretically, the modified allele could be responsible for the production of___
i) the normal / less efficient enzyme
ii) a non functional enzyme
iii) no enzyme at all
Which of the reasons mentioned above attributed to the recessive nature of one of the alleles in
heterozygous individual ?
23. Define: a) Bioinformatics b) Sequence Annotation
24. What did Louis Pasteur’s experiment on killed yeast demonstrate ? Name the theory that got
disproved on the basis of his experiment.
25. Answer the following:
a) What is the principle of immunisation or vaccination?
b) Mention the immune response which is responsible for graft rejection.
26. Explain in brief Somatic hybridisation.
27. Mention the ‘ Evil Quartet’ of biodiversity losses.
IV ANSWER ANY FIVE:
28. Draw a diagram of an angiospermic embryo sac where fertilization is just completed and label
the following parts:
a) The part that develops into an embryo
b) The part that develops into an endosperm
c) The degenerating cells at the chalazal end
29. In which part of human female reproductive system do the following events take place.
A. Release of 1st polar body
B. Release of 2nd polar body
C. Implantation
30. What is the working principle of natural methods of contraception? Define the terms ‘ Periodic
abstinence’ and ‘ Lactational amenorrhea’
31. Explain INDUSTRIAL MELANISM in peppered moth.
32. Mention any SIX side effects of the use of anabolic steroids in females.
33. Write a short note on ‘Biopiracy’ highlighting the exploitation of developing countries by the
developed countries.
34. Mention 3 limitations of ecological pyramids.
IV ANSWER ANY FOUR:
35. Draw a sectional view of Seminiferous tubule of a human. Label the following cells in the
Seminiferous tubule
a) cells that divide by mitosis to increase their number
b) cells that undergo meiosis-I
c) cells that undergo meiosis -II
d) cells that help in the process 0f spermiogenesis
e) cells produced due to spermiogenesis
36. Explain the Mendel’s law of independent assortment
37. What is pedigree analysis ? Mention its advantages ? Construct the pedigree chart for autosomal
dominant trait.
38. Describe the steps involved in DNA fingerprinting technique.
39. a) Draw a well labelled diagram of an antibody molecule
b) How is a cancerous cell different from a normal cell?
c) Name the primary and secondary lymphoid organs
40. Explain the role of microbes in sewage treatment.
41. Define the following terms and give one example for each
a) commensalism b) parasitism c) mutalism d) interspecific competition
VI ANSWER ANY ONE:
42. Answer the following
a) Plan an experiment and prepare a flow chart of the steps that you would follow to ensure that
the seeds are formed only from the desired sets of pollen grains
b) Name the type of experiment that you carried out
c) Write the importance of such experiments
43. Who performed the blender experiment? What does this experiment prove? Describe the steps
followed in this experiment
44. What are restriction enzymes? Why do bacteria have this restriction enzymes? Make a chart
( with diagrammatic representation ) showing a restriction enzyme, the substrate DNA on which it
acts, the site at which it cuts DNA and the product it produces’
