LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PLANT BIOLOGY & PLANT BIO-TECH.

THIRD SEMESTER – APRIL 2011

PB 3508/PB 4505 – CELL BIOLOGY AND ANATOMY

 

 

 

Date : 25-04-2011              Dept. No.                                                  Max. : 100 Marks

Time : 1:00 – 4:00

 

PART – A (20 MARKS)

1. Choose the correct answer (5 x 1 = 5)

 

1. The annular diaphragm is present in the microscope
2. Phase contrast b) Compound           c) Fluorescent          d) Dark – field
3. Anisocytic stomata is seen in
4. Hibiscus             b) Solanum               c) Ixora                       d) Oryza
5. The nongranular peripheral part of cytoplasm is known as
6. hyaloplasm b) endoplasm            c) ectoplasm              d) kinoplasm
7. The minute particles present in mitochondrian outer membrane are called:
8. Glyoxysomes b) Peroxisomes                    c) Lysosomes            d) Oxysomes
9. Cork cambium is an example of meristem:
10. Lateral             b) Primary                  c) Apical                    d) Intercalary

 

• State whether the following statements are True or False (5 x 1 = 5)

 

6. Raphide is a non-protoplasmic cell inclusion.
7. The mesophyll tissue is undifferentiated in dorsiventral leaves.
8. The main axis of Lampbrush chromosome contains a series of thickenings called chromomeres.
9. Lysosomes originate from golgi bodies.
10. In a dark field microscope, the light intensity is controlled by iris diaphragm.

 

• Complete the following (5 x 1 = 5)

 

11. The Tunica – corpus theory was proposed by ________________.
12. The tips of chromosomes are called ______________.
13. Vascular bundles are collateral and closed in the stems of ____________.
14. Cystolith is made up of ____________.
15. Proteins are synthesized by the cell organelles called ________________.

 

 

 

1. Answer the following each within 50 words                                                      (5 x 1 = 5)

 

16. State the principles of Light microscope.
17. Define Cell theory.
18. What are Lenticels?
19. Comment on phagocytosis and pinocytosis.
20. What are peroxisomes?

 

PART – B

Answer any FIVE of the following, each in about 350 words.

Draw necessary diagrams.                                                                                      (5 x 7 = 35 marks)

 

21. a) Briefly describe the working principle of fluorescent microscope.

(OR)

1. Describe the ultra structure and function of endoplasmic reticulum.

 

22. a) Give an account of the various stages of mitosis.

(OR)

1. b) Describe briefly the theories on Apical meristem.

 

23. a) Describe the chemical composition of Nucleus.

(OR)

1. b) Write short notes on cell cycle.

 

24. a) Discuss about meristematic tissues.

(OR)

1. b) Write notes on the ultra structure of plant cell wall and its chemical composition.

 

25. a) Describe the structure of Achyranthes root.

(OR)

1. b) Discuss the structure of Dracaena

 

PART – C

 

Answer any THREE of the following, each within 1,200 words.  Draw necessary diagrams.

(3 x 15 = 45 marks)

26. Explain the structure, working principles and components of Transmission Electron

Microscope.

27. Discuss in detail about the various stages of meiosis. Add a note on its significance.
28. Explain the structure of vascular tissues.
29. Compare the anatomy of dorsiventral and Isobilateral leaves.
30. Explain the ultra structure, chemical composition and function of mitochondria.

 

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