Zoology Mains 2018 Question paper

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Questions for 20 August Zoology

Q:-1 Give the working of spectrophotometers. Describe its significance.(10) Q:-2 With suitable diagrams explain the working of electron microscopy. (10) Q:-3 Give the physiology of Vision in human.(20) Q:-4 What is the molecular mechanism of olfaction? (10) Q:-5 Give the structure of ear and explain the process of hearing.(20) Q:-6 Compare the working of phase contrast and fluorescent microscopes. Give their significance and limitations also. (20)
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Questions for 12 July 2018 Zoology

Q:-1 Discuss the life cycle of Taenia. Give an account on its pathogenesity. (15) Q:-2 Discuss the parasitic adaptations of Platyhelminthes. Explain why they have reduced GI tract? (15) Q:-3 Comment on the characteristics of Platyhelminthes. Classify the phylum upto sub classes. (20) Q:-4 Compare the process of transcription in eukaryotes and prokaryotes. Enlist all the essential enzymes. Q:-5 What is RNA editing? Give the details of type 1 splicing.  Why the split genes are primitive characters?
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Questions for 23 July Zoology

Q:-1 Describe the general characters of Phylum Echinodermata and classify the phylum upto subclasses. (20) Q:-2 What is repressor? Explain the trp operon and compare it with lac operon. (20) Q:-3 What is chromatin modification? How it is mediated? Discuss its role in gene regulation. (15) Q:-4 Describe the various larval forms in phylum Echinodermata. Explain their significance also. (20) Q:-5 What is water vascular system? Briefly explain the mechanism of respiration in Echinodermata. (15)
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Parasitic adaptation of Taenia

Taenia Parasitic adaptations Tapeworms live as internal parasites and they have to make several adjustments for the same. The following are few of the adaptations made by these tapeworms to make their life easy in their hosts. Presence of enzymatic resistant covering A hard covering called as tegument covers the body of these tape worms. Tegument is enzyme resistant and it protects all the internal organs from the digestive actions of the alkaline fluids of the host. On the other hand tegument is permeable to water and other nutrients. Absence of locomotory organelles This parasite lacks organs for locomotion. As there is no need for any locomotory organs both the adult and larval forms lack cilia or flagella. Osmotic pressure The osmotic pressure inside the body is higher than that of the surrounding host tissue or fluid. This helps the parasite to reside conveniently in the host body. Presence of hooks and suckers for attachment For the attachment purpose a scolex...
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