LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PLANT BIOLOGY & BIOTECHNOLOGY

IB 11

FOURTH SEMESTER – APRIL 2006

                                                  PB 4505 – CELL BIOLOGY & ANATOMY

 

 

Date & Time : 27-04-2006/9.00-12.00         Dept. No.                                                       Max. : 100 Marks

 

 

Part A

 

Answer all the questions                                                                     (20 marks)

 

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

 

1. __________ is the capacity of an optical system to show distinct images
2. a) optical power b) photon power          c) resolution                d) resolving power
3. Which are present in all living cells that can synthesise proteins?
4. a) peroxisomes b) ribosomes                c) glyoxysomes           d) lysosomes.
5. These are tiny bags filled with digestive enzymes for intracellular digestion.
6. a) lysosomes b) dictyosomes            c) peroxisomes            d) ribosomes
7. Sandal wood is
8. a) heartwood b) sapwood                 c) spring wood                        d) both a and c
9. Leaf gap and leaf trace are seen in
10. a) internodes b) petiole                     c) nodes                       c) apical meristem

 

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

 

6. Cytotaxonomy is based on the atypical sets of chromosomes in different species.
7. Mitochondria may be filamentous or agranular in shape.
8. Stone cells are also called as osteosclerides.
9. Histogen theory was propounded in the year 1870.
10. Bulliform cells are seen in all leaves.

 

III. Complete the following                                                                 (5 x 1 = 5)

 

11. __________ is the viscous, translucent, colloidal substance of the cell.
12. The non-protoplasmic substances present in the cell are called ____________ substances.
13. ____________ are the suspended non-living structures of the cytoplasm.
14. Nectar producing structures found in parts other than flowers are called _____________.
15. In primitive angiosperms, the cambium is of _______ type.

 

1. Answer the following in about 50 words (5 x 1 = 5)

 

16. Cell theory.
17. Karyotype and Idiogram.
19. Kappe-Korpe theory.
20. Secondary vascular bundles.

 

Part B

 

Answer any five of the following, each in about 350 words. Draw necessary diagrams.                                                                            (5 x 8 = 40)

21. Enumerate the scopes of cytology.
22. Explain the working mechanisms and components of Electron microscope.
23. Comment on Lampbrush Chromosomes and Polytene Chromosomes.
24. Briefly describe the structure and function of Golgi apparatus.
25. Describe the structure of a Plant cell.
26. Write notes on simple tissues.
27. Briefly describe the components of epidermal tissue system.
28. Bring out the distinguishing features of the root in Dicots and Monocots.

 

 

Part C

 

Answer the following questions in about 1500 words. Draw necessary diagrams

(2 x 20 = 40)

 

29. a. Describe the structure and function of plasma membrane.

(or)

 

1. Identify and explain the different phases of mitotic division.

 

30. a. Give a detailed account on the structure and chemistry of cell wall.

 

(or)

 

1. Elucidate the various theories on the organization of shoot apices.

 

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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

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

IB 36

FOURTH SEMESTER – APRIL 2007

PB 4505 – CELL BIOLOGY & ANATOMY

 

 

Date & Time: 24/04/2007 / 9:00 – 12:00         Dept. No.                                                     Max. : 100 Marks

 

 

Part A

 

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

 

1. In a compound microscope, the power of magnification is obtained by multiplying the power of ______ and that of ________
2. a) objective lens and resolving power b) eye piece and resolving power
3. c) optics and resolving power d) objective lens and eye piece
4. Nuclear material composing the chromosome is
5. a) chromomere b) chromatin                c) chromatid                d) chromonema
6. The deeply staining nuclear body which is involved in rRNA synthesis is
7. a) nucleoid b) nucleus                    c) nucleolus                 d) nucleoplasm
8. Periblem gives rise to
9. a) epidermis b) cortex                      c) vascular bundles      d) pith
10. Paracytic stomata is seen in
11. a) Pedilanthes b) Hibiscus                  c) Ixora                                    d) Oryza

 

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

 

6. Mitochondrion is the small cytoplasmic organelle in which anaerobic respiration occurs.
7. Puff is the region of expanded chromosome undergoing transcription in giant polytene chromososmes.
8. Raphides consist of needle like crystals of calcium sulphate.
9. Asterosclerieds are star shaped structures.
10. Secondary vascular bundles are seen in Dracaena.

 

III. Complete the following                                                                   (5 x 1 = 5)

 

11. The branch of cell biology that deals with the chemical and physiochemical analysis of living matter is referred to as ____________.
12. ___________ are small granular cell organelles called microbodies containing the enzymes peroxidases.
13. ______ is the mass of chromatin in the nucleus of resting cells, resulting from inactivation of an X chromosome.
14. Phellum develops due to the activity of _________.
15. Polyarch and exarch condition is seen in _________.

 

 

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

 

16. State the cell theory.
17. Distinguish between phagocytosis and pinocytosis.
18. What are cytoliths?
19. Distinguish between collenchyma and chlorenchyma.
20. Define anomalous secondary growth.

 

 

 

 

 

 

Part B

 

Answer any five of the following each in about 350 words. Draw necessary diagrams.

(5 x 8 = 40)

21. Explain the working principles and the components of the electron microscope.
22. Briefly describe the structure and function of Golgi apparatus.
23. Comment on the shape, size and structure of the typical somatic chromosome.
24. List out the significant events that occur during metaphase, anaphase and telophase of mitotic divisions.
25. Write notes on the ultra structure of plant cell.
26. Explain the organization of shoot apex according to Histogen theory and tunica corpus theory.
27. Explain briefly about the types of meristems.
28. Discuss the anomalous secondary growth seen on Aristolochia.

 

Part C

 

Answer the following questions in about 1500 words. Draw necessary diagrams

(2 x 20 = 40)

 

29. a. Describe the ultrastructure and function of the endoplasmic reticulum.

(or)

 

1. Explain the various stages of meiosis.

 

30. a. Explain in detail the structure of vascular bundles and vascular cambium.

 

(or)

 

1. Explain the following:
2. i) Structure of dicot leaf ii)  Structure of Phloem

 

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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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