Biology – Important Question Bank for Kerala Board (+2) HSE (HSC) Board Exam 2017

Hi, we’re trying to collate and gather the data and would be updating it here a few days before the exam. Please keep on visiting our website for updates.

Please use the comments box below and post questions that you think are important from your analysis. It would help the HSC community a lot.

Do subscribe to our updates so that you do not miss out on any important information that we push your way.

1.(a) Which of the following is a greenhouse gas?

(A) Carbon monoxide

(B) Carbon dioxide

(C) Nitrogen

(D) Ozon

(b) Increase in the level of greenhouse gases has led to considerable heating of earth leading to global warming. How can we control global warming?

2. (A) The following are the major steps of Recombinant DNA technology. Arrange them in correct sequential order.

i) Obtaining the foreign gene product

ii) Amplification of gene of interest using PCR

iii) Downstream processing

iv) Cutting of DNA at specific locations

v) Insertion of recombinant DNA into the host cell/organism.

vi) Isolation of genetic material

(B) Genetic Engineering can be accomplished only if we have some key tools. Restriction Endonuclease is such a tool. Suggest the method of naming of Restriction Endonucleases with reference to EcoRI.

3. (a)Which of the following is a suitable example for semi dwarf variety of wheat.

(A) IR-8 (B) Ratna  (C) Sonalika (D)Taichung Native I

(b) What is biofortification? Suggest any two objectives of biofortification.

4. ( a)Which cell division results in the production of megaspores from Megaspore Mother Cell?

(b) Write down the major difference between microsporogenesis and megasporogenesis in flowering plants.

5. Mutualism is the interaction which confers benefits on both the interacting species. Write two examples for mutualism among organisms.

6. Adaptation is any attribute of the organism that enables the organism to survive and reproduce in its habitat. Write any two morphological adaptations shown by desert plants.

7. The main challenge for the production of insulin using rDNA technique was getting insulin assembled into a mature form. How did Eli Lilly company overcome this challenge.

8. Decomposition is the breakdown of complex organic matter into simple inorganic substances. Which are the important steps in the process of decomposition?

9. Plants, bacteria, fungi and animals whose genes have been altered by manipulation are called Genetically Modified Organisms. Write any four uses of GMO.

10.A novel strategy was adopted to prevent the infection of nematode worms in tobacco plants. It is known as RNA interference. How does this strategy operate in tobacco plants?

11. Write the functions of the following:

a) 5-methyl Guanosine triphosphate (5^m G PPP)

b) DNA Ligase

12. Carefully read the statement given below and correct the digits in the brackets a and b, if it is wrong.

“In man, chromosome 1 has most genes (a) (1968) and the Y chromosome has the fewest (b)(231)

13. “A population remains constant and stable in its allele frequency from generation to generation. Such population shows genetic equilibrium”.

a) Name the underlying principle in the above statement.

b) Name any two factors which affect genetic equilibrium.

14. In AIDS, HIV attacks on (Helper-T cells, B-Lymphocytes, Monocytes, RBC)

15. Read the following and select the correct statement/statements

a) 23 s RNA act as a enzyme in prokaryotes.

b) In prokaryotes DNA is monocistronic

c) Francis Crick proposed the Central Dogma of Molecular biology

d) In Eukaryotes three types of RNA polymerases are present. (a only, a and b, a and c, a and d)

16. Write the gametes produced from self crossing of genotype RrYy.

18. (a) Carefully read the following symptoms and identify the genetic disorders
a) Autosomal linked recessive trait where RBC become sickle shaped.
b) Inborn error of metabolism, where phenyl alanine accumulates in blood.
c) Disorder due to absence of ‘X’ chromosome

(b) Write the contribution of the following biologists in connection with genetics.

1) Henking

2) T.H. Morgan

3) Sutton and Boveri

19. Complete the table by using hints from brackets. (Haemophilus influenzae, Common cold, Salmonella typhi, Running nose & Nasal congestion, Pneumonia, Ascariasis, Sustained fever 390 C – 400 C, Malaria)

20. Categories the following organs into two, with appropriate headings. Thymus, Spleen, Bone marrow, Peyer’s Patches

21. (A) How many sperms and ova are produced from 50 primary spermatocyte and 50 primary oocyte respectively? (100 sperms and 100 eggs, 200 sperms and 100 ova, 200 sperms and 50 ova, 50 sperms and 50 ova)

(b) Observe the diagram carefully and identify a, b, c and d.

22. Arrange the following terms into two based on the mode of biodiversity conservation. Hot spots, Zoological Park, Sacred groves, Wild life Safari Parks

(B) Fill the blank box noted as A

23. Arrange the following primates in correct sequence of evolution to man.
a) Dryopithecus
b) Homo erectus
c) Homo habilis
d) Neanderthal man

24. Carefully read the following statement and answer the questions
“A population remain constant and stable in its allele frequency from generation to generation. Such population shows genetic equilibrium”.
a) Name the underlying principle in the above statement.
b) Name any two factors which affect genetic equilibrium.

25. Study the mRNA segment given below which is ready to be translated into a polypeptide chain and answer the following questions.

a) What is A and B denotes?

b) Write the triplet codon for A and B