Nalanda Open University
Annual Examination 2016
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
Somatic cell division includes
Cytokinesis only
Karyokinesis only
Cytokinesis followed by Karyokinesis
Karyokinesis followed by Cytokinesis
Double helix model of DNA was proposed by
Lamark and Darwin Hugo de Vries
Fisher and Heldane Watson and Crick
DNA replication occurs during
S period G1 period G2 period Prophase
Extranuclear genes occur in
Mitochondria and cytoplasm ER and cytoplasmic
Cytoplasm and Ribosome Cytoplasm only
Crossing over takes place in
Pachytene Zygotene Diplotene Diakinesis
Two strands of DNA are attached by H-bond between
G-C G-T T-C G-C
Chromosomes other than autosomes of a cell are
Sex Chromosome Giant Chromosome
Episome Plasmids
(viii) The nucleus is separated from surrounding cytoplasm by a nuclear
membrane which is:
Double and non-porous Double and porous
Single and porous Single and non-porous
2. What is mutation breeding? Describe the procedure of mutation breeding.
3. What is meiosis? Describe meiosis I in details.
4. Explain chromosomal aberrations. Also describe their different types.
5. Describe the extranuclear inheritance in prokaryotes.
6. Describe the detailed structure of nucleus of Eukaryotes.
7. Explain genetic code. Describe its nature and properties.
8. Give the meaning of plant introduction and acclimatization. Also describe
their process.
9. Write notes on any Two of the following
Hybrid Vigour
Cell cycle
Crossing over
Application of genetic engineering
10. Give an account of conservation of germ plasm.