Microbiology and virology- Biochemistry-BSC-Nagpur-Summer-2017

Bachelor of Science (B.Sc.) Semester-I Examination
BIO-CHEMISTRY (Microbiology and Virology)

Optional Paper—1
Time : 3 Hours
Maximum Marks : 50

N.B. :— (1) All questions are compulsory and carry equal marks.
(2) Draw well labelled diagram wherever necessary.

1. Explain with ray diagram, working, principle and applications of phase contrast microscopy. [10M]

OR

Write notes on :—

(a) Controversy over spontaneous generations. [5M]

(b) Concept of immunization. [5M]

2. Describe the principle and technique of Gram staining. [10M]

OR

Give a detailed description of Lytic cycle of a Bacteriophage. [10M]

3. Explain the cell wall structure of Gram negative Bacteria. [10M]

OR

Give a detailed description of endospore structure and its formation. [10M]

4. What is growth curve ? Discuss about various phases of growth curve in detail. [10M]

OR

Explain the classification of microorganisms on the basis of Physical conditions required for growth.
[10M]

5. Solve any TEN of the following :—

(i) Define Numerical aperture. [1M]

(ii) Define Resolving power. [1M]

(iii) In what way EM condensers are different from condensers used in light microscopy ? [1M]

(iv) What is meant by simple staining ? [1M]

(v) Name the stains used in acid fast staining. [1M]

(vi) Name any one endospore forming Bacteria. [1M]

(vii) Define Plasmid. [1M]

(viii) What are fimbrae ? [1M]

(ix) What is a capsule ? [1M]

(x) What is meant by continuous culture ? [1M]

(xi) What are microaerophilic bacteria ? [1M]

(xii) Define Generation Time. [1M]