Nalanda Open University
Annual Examination 2017
B.Sc. Botany (Honours), Part-II
Paper-III
Group A (Microbiology)
1. Give an account of ultra structure of Tobacco mosaic virus. How do they
reproduce
2. What is Conjugation Describe the process of conjugation in bacteria.
3. Name few uses of Bacteria in industries.
Group B (Plant Pathology)
4. Describe the role of enzymes in pathogenesis.
5. Write pathological notes on any two of the following
Late blight of potato Citrus canker
Biochemical defiance of the host Early blight of Potato
6. Write etiology, symptoms and control of wilt of pigeon pea.
7. Describe toxins and their role in disease development.
Group C (Embryology)
8. What are Endosperms What is its significance in Plant
9. Write Short notes on any two of the following
Double fertilization Anther culture
Apomixis Parthenocarpy
10. Give an account of development of any one type of embryo sac studied by you.