LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
M.Sc.DEGREE EXAMINATION - BIO TECHNOLOGY
THIRDSEMESTER – APRIL 2012
BT 3954- MARINE BIOTECHNOLOGY
Date : 23-04-2012Dept. No. Max. : 100 Marks
Time : 1:00 - 4:00
SECTION A
Answer all the questions: (20 marks)
I Choose the correct answer (5 × 1 = 5marks)
1. Pressure exerted by 1 meter of sea water nearly equals ______:
a) 1 debrisb) 10 debrisc) 100 debrisd) 1000 debris
2. In estuarine community ______area is used for spawning:
a) salt marshesb) mud flatsc) codgrassd) channels
3.______chain is responsible for signaling:
a) α and γb) βc) α and βd) β and γ
4. Bacterial mats that grow on ______are found to be rich source of lipases and esterases:
a) whalesb) sharksc) tarponsd) jellyfish
5. World environment day was established in ______:
a) 1952b) 1962c) 1972d) 1982
II State whether the following statements are True or False; if false give reason (5 × 1 = 5 marks)
6. Sense of magnetoreception and magnetite crystals in fish helps to navigate to long distance.
7. Some brown algae belong to the order Laminariales.
8. Tides allow exchange of gases.
9. Free radicals have been recognized as an important signal molecule in aqueous environment.
10. Sex reversal changes the phenotypic character of the fish.
III Complete the following (5 × 1 = 5 marks)
11. Triploids cause sterility in fish due to suppressed development of ______.
12. In sponges, the waste is excreted through large holes called ______.
13. ______is inserted into the gonadal pore of the fish.
14. Sharks have large livers that aids in ______.
15.Sea weeds have stem like structures called ______.
IV Answer the following, each in about 50 words: (5 × 1 = 5 marks)
16. Define plankton.
17. What are surface currents?
18. What is cannulation?
19. What are bioactive compounds?
20. What is petroleum remediation product?
SECTION B
Answer the following, each in about 500 words; Draw diagram wherever necessary:
(5 × 8 = 40 marks)
21. a) Explain the components of Oceanography .
OR
b) What are the different modes of adaptation of marine organisms in the sea?
22. a) What are the different methods used for cultivation of sea weeds in the sea?
OR
b) Explain the phylum Mollusca and Arthropoda with reference to marine ecosystem.
23. a) Write down the applications on transgenic fish technology.
OR
b) How hormonal manipulation is done in fish to attain early maturity?
24. a) Write notes on i) Biopolymersii) Bioadhesives.
OR
b) Give an account on bioluminescent compound and mention its applications.
25. a) Explain gene regulation of marine hyperthermophiles..
OR
b) What is the impact of new catch technology in the marine environment?
SECTION C
Answer any Two of the following, each in about 1500 words; Draw diagram wherever necessary:
(2 × 20 = 40 marks)
26. Explain the immunological mechanism involved in sea food allergy.
27. Define estuary. Explain the different types of estuarine communities.
28. Explain the life cycle of Penaeid shrimp. Add a note on larval rearing.
29. What are the causes, symptoms and diagnosis of Alzheimer’s disease? Mention the names of drug
materials isolated from the marine sources.
*******