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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