B.Sc. Microbiology-Mumbai-May 18 Copy

MUMBAI UNIVERSITY

B.Sc. Microbiology

Sem. 1 Summer  :- 17

Total Time : 3 Hrs
Total Marks : 100
Note : 1 All questions carry equal marks.
            2 Attempt all question

Q. 1) A Define the following. (5M)
i) Pleomorphism
ii) Prokaryote
iii) Metachromatic granules
iv) Lipo polysaccharide
v) Polysaccharide

Q.1) B. State whether the following statements are true of false. (5M)

i) Bacteria have membrane-bound organelle.
ii) sucrose is a non-reducing sugar.
iii) Endoplasmic reticulum is involved in synthesis of cell membrane
iv) E. coli is a motile organism.
v) Fimbriae are made of protein.

Q. 1 C) Give one example for each of the following.  (5M)

i) Organisms with PHB granules.
ii) Peritrichously flagellated bacterium
iii) Component of cytoskeleton in eukaryotic cell
iv) Phospholipids
v) Pentose sugar

Q. 1 D) Select the most appropriate and rewrite the statements : (5M)

i) RNA does not contain the following base ——————- (A, E, G)
ii) The virulence are modified ————- (Endospore, cell wall, capsule)
iii) Mesosomes are modified ————– (Cell Wall, Cell membrane, endospore)
iv) The sex pilus is involved in —————-( Cell adherence, genetic recombination, nutrition )
v) Starch and cellulose contain the monomer. __________ (Glucose, Maltose, Fructose )

Q. 2 A) Answer any two of the following. (20M)

i) Discuss the structure of nucleic acids and state the difference in their structure.
ii) Explain the general structure of cell wall of bacteria and state the difference between cell walls of Gram-positive and Gram-negative bacteria.
iii) Discuss the structure of lysosomes, protosomes and state their function.

Q. 3 A) Answer any three of the following. (18 M)

i) Discuss the structure and properties exhibited by bacterial endospores.
ii) Write a short note on bacterial plasmids and their significance.
iii) Explain the various types of inclusion granules present in bacterial cell.
iv) Diagrammatically explain the ultra-structure of bacterial flagella.
v) Write a  short notes.

Q. 3 A) Do as directed. (2M)

i) Name the scientist who discovered symbiotic nitrogen fixation.
ii State the function of magnetosome.

Q. 4 A) Answer any three of the following. (18M)

i) Explain diagrammatically the structure and function of mitochondria.
ii) Explain the structure an state the function carried out by eukaryotic and prokaryotic ribosomes.
iii) Explain diagrammatically the structure of  basal body of eukaryotic flagella.
iv) Write a short note on laboratory acquire infection and their prevention.

Q. 4 B) . Do as directed. (12M)

i) Name one locomotory organelle of eukaryotic
ii) Name one plastid involved in pheromones.

Q. 5 A) Answer any three of the following. (18M)

i) Discuss the amino acids, their structure and explain how they form proteins.
ii) Discuss the complex lipid with examples and state their function.
iii) Explain the various types of polysaccharides and state their importance in cellular metabolism.
iv) Discuss the properties water molecule and explain its significance.
v) Discuss the types of isomers and state their role in  microbial cell.
vi) Discuss the various types of chemical bonds encountered in organic compounds with examples.

Q. 5 B) Do as directed. (2M)

i) Name a fatty acid
ii) Give the structure of fructose.