Questions for 20 July Zoology

Q:-1What is restriction enzymes? Discuss its various types and explain its nomenclature by taking suitable examples. (15)

Q:-2 Give the general characteristics of phylum Mollusca and classify the phylum upto sub classes. (20)

Q:-3 Comment on feeding habit of Mollusca. How it is different from Feeding habit of Echinodermata. (20)

Q:-4 What is genetic library? Compare between cDNA and DNA library. (10)

Q:-5 Explain the process of making the recombinant DNA. Describe the various types of DNA vectors and explain which one is better and why? (15)

Q:-6 Explain the respiration process in classes of Mollusca with suitable diagrams. (15)

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Questions for 20 August Zoology

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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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