Zoology CSS Paper II 2006

NOTE: (i) Attempt ONLY FIVE questions in all, including QUESTION NO.7, which is COMPULSORY. All questions carry EQUAL marks.
(ii) Extra attempt of any question or any part of the attempted question will not be considered.
(iii) Candidate must draw two straight lines ( ============= ) at the end to separate each question attempted in Answer Books.

NOTE:Attempt ONLY FIVE questions in all,INCLUDING question NO 8, WHICH IS COMPULSORY.

Q.1. (a) Give a detailed account of structure of lysosome.discuss its function in a cell. (12)
(b) Discuss the steps involved in the semi conservative replication of DNA (8)

Q.2. (a) Describe the microscopic,ultramicroscopic and chemical structure of a Eukaryotic chromosome. (10)
(b) List the steps involved during the process of meiosis. (10)

Q.3. (a) Define respiration.Discuss the mechanism involved in the transport of carbon dioxide from tissue to lungs. (8)
(b) What is the basic excretory product? Discuss different excretory substances produced in different animals. (12)

Q.4. (a) Describe the mechanism involved in transmission of the nerve impulse along the nervous system. (10)
(b) “Pituitary Gland works as a link b/w the nervous system and the other hormonal complexes of the body”.Discuss. (10)

Q.5. (a) Discuss the phenomena of genetic linkage. (5)
(b) Describe sex linkage ,giving suitable example. (6)
(c) Discuss Mendel’s law of segregation,as it is understood now. (9)

Q.6. (a) Discuss polyploidy.How is it exploited for human development? (7)
(b) Define gene map.Discuss the method involved in the preparation of a gene map in diploi (d) (13)

Q.7. (a) Give an account of theory of Darwin theory of natural selection,as it is understood now. (13)
(b) State and explain Haeckel’s Biogenetic law. (7)


Q.8.Write only the correct answer,in the answer book, don’t reproduce the question.

1) cell membrane is chemically
(a) nucleoprotein (b) lipoprotein (c) lipid (d) protein

2) ATP is produced in
(a) golgi complex (b) lysosome (c) mitochondria (d) none of these

3)Transcription is the phenomenon involved with
(a) mRNA formation (b) binding of amino acid (c) DNA replication (d) all of these

4) Glycolysis occurs in
(a) endoplasmic reticulum (b) cytoplasm (c) mitochondria (d) golgi bodies

5) Centromere in a chromosome is heterochromatic as it
(a) donot divide (b) helps chromosomal attachment with the spindle (c) donot go a regular change in the ceel cycle (d) all of these together

6) Neurotransmitter are involved in
(a) nerve transmission (b) synaptic transmission (c) chemical transmission (d) b &c (e) a & c

7) Pepsin is the chemical involved in
(a) Protein breakdown (b) carbohydrates breakdown (c) protein synthesis (d) lipid breakdown

8) Food is assimilated into the body from digestive tract in
(a) oesophagus (b) stomach (c) small intestine (d) rectum

9) Excretory product is produced through the breakdown of
(a) protein (b) carbohydrates (c) lipid (d) all of these

10) Basic process of respiration occurs in
(a) lungs (b) mitochondria (c) blood circulation (d) none of these

11) Genetic dominance involves
(a) personality dominance (b) better adaptive value (c) a wider population distribution (d) all a,b&c (e) none of the above

12) Principle of segregation is applicable to
(a) Heterozygous individual only (b) homozygous individual only (c) Diploid individual (d) none of these

13) XXY individual in man is phenotypically a
(a) Female (b) male (c) super female (d) super male

14) sex linkage concerns with the gene
(a) Responsible for the development of sex (b) Associate with some sex (c) Located on X chromosome only (d) located on sex chromosome

15) Cistron is the smallest part of the chromosome working as
(a) Mutational unit (b) functional unit (c) Recombinational unit (d) None of these

16) First living organism on this planet was
(a) an algal cell (b) a virus (c) a protozoa (d) none of these

17) Darwin’s theory of natural selection believe in selection of
(a) the fittest (b) fitters (c) better adapted individual (d) All of these

18) The raw material for evolution comes from
(a) Mutation (b) Chromosomal aberration (c) Recombination (d) All of these

19) A group develops to adapt a number of diverse niches.The phenomena is called as
(a) Convergent evolution (b) Divergent (c) Punctuated evolution (d) none of these

20) Linnaeus was the father of classification and was
(a) Not believer of evolution (b) strong believer of evolution (c) believer of limited evolution (d) Believer of natural selection


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