LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION – PLANT BIOLOGY & PLANT BIO-TECH.
THIRD SEMESTER – APRIL 2012
PB 3508/PB 3504 – CELL BIOLOGY AND ANATOMY
Date : 26-04-2012 Dept. No. Max. : 100 Marks
Time : 9:00 – 12:00
PART – A
ANSWER THE FOLLOWING , EACH WITHIN 50 WORDS ONLY: (10X2=20)
- What is raphide?
- What is the role of peroxisomes?
- What are satellite chromosomes?
- Define Idiogram.
- What is a bordered pit?
- What is meristem?
- Define Endarch.
- What is bicollateral vascular bundle?
- Explain unilacunar node.
- What is paracytic stomata?
PART – B
ANSWER THE FOLLOWING , EACH ANSWER WITHIN 500 WORDS;
DRAW DIAGRAMS WHEREVER NECESSARY: (5X7=35 Marks)
- a) Write the principles and application of Scanning Electron Microscpe.
(OR)
- b) Describe the structure and functions of endoplasmic reticulum.
- a) Discuss the types of Nucleic acids.
(OR)
- b) Write notes on chromosomal nomenclature.
- a) Describe the stages of prophase –I of meiosis.
(OR)
- b) Write short notes on secretory tissue.
- a) Write an account on cambium.
(OR)
- b) Discuss the types of meristem.
- a) Give an account on stomatal types.
(OR)
- b) Explain anomalous secondary growth in Achyranthes
PART – C
ANSWER ANY THREE OF THE FOLLOWING, EACH WITH 1200 WORDS;
DRAW DIAGRAMS WHEREVER NECESSARY: (3X15=45 Marks)
- Write a detailed account on the ultrastructure of chloroplast and its functions.
- Describe giant chromosomes.
- Give an account on xylem.
- Discuss the theories relating to apical meristems.
- Describe the anomalous secondary growth in dicot stems.
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