B II (Three Year G)
Under 1+1+1 System
2010
BOTANY (General)
FOURTH PAPER
(Revised New Syllabus)
Time: 2 hours
Full Marks: 45
The figures in the margin indicate full marks.
1. Answer the following questions in brief:
1x5=5
(a)
(b)
(c)
(d)
(e)
What is integral protein?
What is telocentric Chromosome?
Define tautomerism.
What are alleles?
What is start codon?
2. Answer any one of the following questions:
16x1=16
(a) What is genetic code? Discuss the properties of genetic code. What is Wobble hypothesis?
2+10+4=16
(b) Illustrate the primary structure of chromosome. Describe the nucleosome model of
chromatin organization. Discuss the main differences between DNA and RNA molecules.
7+7+2=16
3. Answer any two of the following questions:
12x2=24
(a) How many types of RNA are present in the cell? Comment on the roles played by each of
them.
2+10
(b) With suitable example describe auto-polyploidy and allopolyploidy.
12
(c) Give an account of Watson and Crick double-helix model of DNA molecule.
12
MRD-2620/462
(Turn Over)
(d) Write notes on :
4x3=12
(i)
(ii)
(iii)
MRD-2620/462
Sex Chromosome
Plasmid
Sickle-cell anemia
(Turn Over)