LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION – PLANT BIOLOGY & PLANT BIO-TECH.
THIRD SEMESTER – NOVEMBER 2012
PB 3508/3504/4505 – CELL BIOLOGY AND ANATOMY
Date : 05/11/2012 Dept. No. Max. : 100 Marks
Time : 9:00 – 12:00
PART – A
Answer the following, each within 50 words: (10 x 2 = 20 marks)
- State the principle of fluorescent microscope.
- What are lysosomes?
- Define karyotype.
- What is telomere?
- Define cell cycle.
- What are secretory cells?
- Define apical meristem.
- What is meant by exarch xylem?
- What is anisocytic stomata.
- What is unilacunar node?
PART – B
Answer the following, each within 500 words:
Draw diagrams, flowcharts wherever necessary: (5 x 7 = 35 marks)
- a) Briefly explain the working principle of phase contrast microscope.
(OR)
- b) Describe the ultrastructure of nucleaus.
- a) How are chromosomes classified.
(OR)
- b) Classify nucleic acids and add a note on histones.
- a) Draw and explain the different stages in Mitosis.
(OR)
- b) What are permanent tissues? Give an account on Schlerenchyma.
- a) Classify and explain the types of meristem.
(OR)
- b) Write a brief account on vascular cambium.
- a) Draw and explain the primary structure of a dicot stem.
(OR)
- b) Give a brief account on the anatomical features of Dracaena stem.
PART – C
Answer any THREE of the following, each within 1200 words;
Draw diagrams, flowcharts wherever necessary: (3 x 15 = 45 marks)
- Describe in detail the structure and function of chloroplast.
- Give an account giant chromosomes.
- Draw and explain the different stages of meiosis.
- Give an account on theories of apical meristem.
- Explain anomalous secondary growth in Bignonia.
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