B.Sc. Botany (Honours), Part-III
Paper-VII (Cytogenic and Molecular Biology)
Time: 3.00 Hrs. Full Marks: 80
Answer any five questions. Questions No. 1 is compulsory. All questions carry equal marks.
1. Multiple choice questions
Mutations which after nucleotide sequence within a gene are:
Frameshift mutation
Base pair substitution
Both a and b
None of these
Chromosome complements with 2n-1 is called as:
Trisomy Nullisomy
Tetrasomy Monosomy
Genic balance theory of sex-determination was given by:
Mendel Morgan Bridges Devtin.
Distance between the strands of DNA is:
3.4 Ao 3 Ao
12 Ao 20 Ao
Chargaff's rule is applicable to:
Single stranded DNA and RNA Single Stranded RNA
Double stranded DNA Single stranded DNA
Formation of RNA from DNA is called:-
Translation Reverse transcriptase Transcription Transduction
What does "Lac" refer to in Lac operon?
Lactose Lactase
The number 1,00,000 Lac insect
(viii) Law of dominance and recessiveness is the result of
Back cross
Incomplete dominance
Dihybrid cross
Monohybrid cross
2. Describe changes in chromosome configuration during Prophase-I of Meiosis.
3. What is chromosomal aberrations? Describe with suitable diagram different types of
chromosomal aberrations.
4. Describe chemical basis of heredity.
5. Give an account of conservation of germ plasm.
6. Give brief account of Linkage and crossing over.
7. Mention law of inheritance proposed by Mendel.
8. Describe ultrastructure of Chromosome.
9. Write short notes on any two of the following:
Hybrid vigour Cell cycle Types of RNA
10. Explain Plant introduction and acclimatization. Also describe their process.