ZOOLOGY PAPER 2
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TIME ALLOWED THREE HOURS MAXIMUM MARKS 100
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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).
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Q.2.(a)Describe the microscopic,ultramicroscopic and chemical structure of a Eukaryotic chromosome.(10).
(b)List the steps invovled during the process of meiosis.(10).
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Q.3.(a)Define respiration.Discuss the mechanism invoved 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).
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Q.4.(a)Describe the mechanism involved in transmission of the nerve impluse 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).
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Q.5.(a)Discuss the phenomena of genetic linkage.(5).
(b)Describe sex linkage ,giving suitable example.(6).
(c)Discuss Mendal's law of segregation,as it is understood now.(9).
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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 diploid.(13).
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Q.7.(a)Give an account of theory of Darwin theory of natural selection,as it is understood now.(13).
(b)State and explain Heackle 's Biogenetic law.(7).
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COMPULSORY QUESTION
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Q.8.Write only the correct answer,in the answer book dont reproduce the question.
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1)cell membrane is chemically
a.nucleoprotein
b.lipoprotein
c.lipid
d.protein
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2).ATP is produced in
a.golgi complex
b.lysosome
c.mitochondria
d.none of these
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3).Transcription is the phenomenon involved with
a.mRNA formation
b.binding of aminoacid
c.DNA replication
d.all of these
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4)Glycolsis accurs in
a.endoplasmic recticulum
b.cytoplasm
c.mitichondria
d.golgi bodies
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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
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6)Neurotransmitter are involved in
a.nerve transmission
b.synoptic transmission
c.chemical transmission
d.b &c
e.a & c
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7)Pepsin is the chemical involved in
a.Protein breakdown
b.carbohydrates breakdown
c.protein synthesis
d.lipid breakdown
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8)Food is assimilated into the body from digestive tract in
a.oesophagus
b.stomach
c.small intestine
d.rectum
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9)Excretory product is produced through the breakdown of
a.protein
b.carbohydrates
c.lipid
d.all of these
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10)Basic process of respiration occurs in
a.lungs
b.mitochondria
c.blood circulation
d.none of these
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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
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12)Principle of segregation is applicable to
a.Hetrozygous individual only
b.homozygous indvidual only
c.Diploid individual
d.none of these
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13)XXY individual in man is phenotypically a
a.Female
b.male
c.super female
d.super male
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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
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15)Cistron is the smallest part of the chromosome working as
a.Mutational unit
b. functional unit
c.Recombinational unit
d.None of these
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16)First living organism on this planet was
a.an algal cell
b.a virus
c.a protozoa
d.none of these
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17)Darwin's theory of natural selection believe in selection of
a.the fittest
b.fitters
c.better adapted individual
d.All of these
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18)The raw material for evolution comes from
a.Mutation
b.Chromosomal aberration
c.Recombination
d.All of these
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19)A group gevelops to adapt a number of diverse niches.The phenomena is called as
a.Convergent evolution
b.Divergent
c.Punctuated evolution
d.none of these
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20)Linneous 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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