CS/B.Sc(H)/Micro-Bio/SEM-2/MGR-204/2013
2013
MICROBIAL GROWTH & REPRODUCTION
Time Allotted : 3 Hours Full Marks : 70
The figures in the margin indicate full marks.
Candidates are required to give their answers in their own words
as far as practicable.
GROUP – A
( Multiple Choice Type Questions )
1. Choose the correct alternatives for any ten of the following :
10x1 = 10
i) Organisms that grow well at 0°C and have optimum
growth temperatures of 10°C or higher are called
a) Psychrotrophs
b) Psychrophiles
c) Mesophiles
d) Thermopiles.
ii) The plasmid which helps in cell survival is
a) F plasmid
b) Col plasmid
c) R plasmid
d) Vine lent plasmid.
iii) The size and number of bacterial cell is decreased in
a) Lag phase
b) Log phase
c) Stationary phase
d) Death phase.
iv) Ultraviolet light causes mutation in bacteria
a) by breaking chromosome
b) by binding thymine bases on opposite strand
c) by binding adjacent thymine bases
d) by breaking the DNA segments.
v) Techoic acid is found in
a) gram positive bacteria
b) gram negative bacteria
c) both of these.
d) none of these.