Biology Section I Botany – Important Questions Bank for Meghalaya Board (MBOSE) HSSLC 2016 Examination

Group—A consists of 4 questions (Nos. 1– 4) of 1 mark each and is multiple-choice type.
Group—B consists of 4 questions (Nos. 5–8) of 1 mark each, very short-answer type, to be answered in 1 sentence each.
Group—C consists of 3 questions (Nos. 9–11) of 3 marks each, with one alternative from the same Unit, short-answer type–I, to be answered in 20–30 words each.
Group—D consists of 2 questions (Nos. 12 and 13) of 4 marks each, with one alternative from the same Unit, short-answer type–II, to be answered in 30–40 words each.
Group—E consists of 2 questions (Nos. 14 and 15) of 5 marks each, with one alternative for each question, long-answer type, to be answered in 70–80 words each.

Q.1. Choose and write the correct answer for the following :

1.  A type of reproduction where fusion of gamates occurs is called

(a) sexual reproduction

(b) asexual reproduction

(c) vegetative reproduction

(d) parthenogenesis

2. In incomplete dominance, the phenotypic ratio for F2 generation is

(a) 3 : 1

(b) 1 : 2 : 1

(c) 9 : 7

(d) 9 : 3 : 3 : 1

3. The microbe responsible for converting milk into curd is

(a) Penicillium

(b) Aspergillus

(c) Saccharomyces

(d) Lactobacillus

GROUP—B

4. Define parthenocarpy.

5. What are Okazaki fragments?

6. Define biofortification.

7. What is Bt cotton?

8. What is totipotency?

9. Define community.

10. Define biotechnology.
11.  Define incomplete dominance.
12. What is a callus?
13. Define biopatent.

GROUP—C

14. Write the ecological adaptations of xerophytes.

15. Write a note on symbiosis.

16. Write a note on multiple alleles.

17. Write a note on mutation.

18. Describe briefly the role of microbes in the production of biogas.

19. Explain food chain with suitable diagram.

20. Write a note on incomplete dominance.

GROUP—D

21. Describe different types of cross pollination in plants.

22. What are genetically modified organisms? Explain its significance.

23. Describe the process of fertilization in angiosperm.

24. Explain complementary genes with examples.

25. Explain briefly the application of biotechnology in agriculture.

GROUP—E

26. Describe the mechanism of DNA replication.

27. Explain the chromosome theory of inheritance.

28. Explain different types of ecological adaptation in hydrophytes.

29. Explain energy flow in an ecosystem with suitable diagrams.

30. Explain Lac operon with suitable diagram.

31. Distinguish between food chain and food web.

32. Explain briefly the biotic components of an ecosystem.

33.  What is population? Describe any four characteristics of a population.

34. Explain the chromosome theory of inheritance.

35.  Describe the positive interactions amongst different species.

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