LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

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

ED 06

THIRD SEMESTER – November 2008

PB 3504 / 4505 – CELL BIOLOGY & ANATOMY

 

 

 

Date : 08-11-08                     Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

PART – A

1. Choose the correct answer.

(5 x 1 = 5)

1. The space between the two mitochondrial membrane is called

(a). matrix        (b).  cristae      (c).  perimitochondrial space

(d). intermitochondrial space.

 

2. Giant chromosomes are formed by

(a).   amitosis   (b).  endomitosis         (c). repeated mitosis    (d). mitosis

 

3. Which takes part in secondary growth?

(a).  apical meristem    (b).  open bundles      (c).  closed bundles

(d). intercalary meristem.

 

4. Histogen theory was proposed by

(a).  Nageli      (b).  Henstein  (c).  Schmidt   (d). Gifford.

 

5. Amphistomatic leaf is the other name for

(a).  dorsiventral leaf   (b). isobilateral leaf     (c).  phyllode   (d).  cladode.

 

1. State true or false,

(5 x 1 = 5)

6. The entire process of respiration occurs in mitochondria.

 

7. Darkly staining region of chromatin reticulum is called heterochromatin.

 

8. Chromosome duplicate in interphase stage.

 

9. Interfascicular cambium is a primary meristem.

 

10. In Dracaena, secondary growth occurs because the vascular bundles are open.

 

 

III        Complete the following.

(5 x 1 = 5)

11. The magnification of Electron Microscope is very high because ______________ is very short.
12. The puffs of polytene chromosome is also called as __________________ .
13. Crossing over occurs in ____________ stage of meiosis.
14. The growth that increases the circumference of cambium is called ___________ .
15. __________________ is formed by breaking down of protoxylem vessels.

 

 

1. Answer the following each within 50 words.

(5 x 1 = 5)

16. Write about raphides.
17. What are chromatids?
18. Define terminalization.
19. What is quiescent centre?
20. Describe the structure of casparian strips.

 

PART – B                                          (5 x 8 = 40)

Answer any FIVE of the following, Each answer within 500 words, Draw  diagrams whenever necessary

 

21. Describe the ultrastructure and function of plasma membrane.

 

22. Explain the principle and working mechanism of phase contrast microscopy.

 

23. Briefly describe the size, shape and ultrastructure of chromosomes.

 

24. Summarise the salient features of meiosis.

 

25. Describe the origin, organization and types of vascular cambium.

 

26. Explain the differentiation of root from the primordia

 

27. Differentiate dorsiventral and isobilateral leaf.

 

28. Write notes on             (a).  Nodal anatomy    (b). stomatal types.

 

 

PART – C                                          (2 X 20 = 40)

 

Answer the following questions, Each not exceeding 1200 words.

 

27. Write an essay on organization of Giant chromosomes.

or

28. Draw the ultrastructure of a plant cell and briefly describe the compartmentalization in the cells.
29. Write an essay on the classification and types of meristem. Add a note on Tunica

carpus theory.

or

30. How is anomalous secondary growth differ from normal secondary growth?

 

 

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