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Bacterial Growth- Part 2
See all quizzes of Bacterial Growth here:
1 The orderly increase in the quantity of all
the cellular components is known as
a. Reproduction b. Growth
c. Binary fission d. None of these
2. The most common mode of cell division
in bacteria is
a. Binary fission
b. Transverse binary fission
c. Longitudinal binary fission
d. None of these
3. How much time a bacterium take for the
complete duplication?
a. 30 min. b. 10 min.
c. 20 min. d. 25 min.
4. The generation time is
a. The time required for the cell to divide
b. The total division of the cell during its life time
c. The total no.of cells formed
d. None of these
5. In bacteria, the increase in population is
in the manner
a. Geometric progression
b. Multiplication
c. Doubling
d. None of these
6. Physiologically the cells are active and
are synthesizing new protoplasm in
which stage of the growth in bacteria
a. Log phase b. Lag phase
c. Stationary phase d. None of these
7. The most active stage in the sigmoid curve
of bacteria in which maximum growth is
attained
a. Lag phase b. Stationary phase
c. Decline phase d. Log phase
8. Log-phase is also known as
a. Death phase b. Exponential phase
c. Lag-phase d. None
9. The no. of generations per hour in a bacteria
is
a. Growth rate b. Generation time
c. Sigmoid curve d. None of these
10. In the sigmoid curve (or) growth curve of
bacteria how many stages are there
a. 3 b. 4
c. 2 d. 5
11. The reproduction rate is equal to death
rate in which stage
a. Decline phase b. Stationary phase
c. Lag phase d. Log phase
12. Minimum growth temperature is
a. The growth of organisms at lowest temperature
b. The lowest temperature at which the
microorganisms grow
c. The maximum temperature at which the
growth is stable
d. None of these
13. Optimum growth temperature is greater
that 45oC is
a. Mesophiles b. Thermophiles
c. Psychrophiles d. None of these
14. The organisms which can grow both in
presence and absence of oxygen
a. Aerobes
b. Anaerobes
c. Faculative anaerobes
d. Strict aerobes
15. The organisms which can grow best in
the presence of a low concentration of
oxygen
a. Aerophilic b. Microaerophilic
c. Aerobic d. Anaerobic
16. The compound that is added to the
medium to absorb oxygen for the
creation of anaerobic conditions
a. Sodium Thioglycollate
b. Nitrous acid
c. Citrate
d. None of these
17. The utilization of light energy to drive the
synthesis of ATP is called as
a. Photolysis
b. Photophosphorylation
c. Photosynthesis
d. Respiration
18. During cyclic phosphorylation NADP is
formed or not.
a. No NADP formation
b. No NADP utilization
c. NADP is converted into NADPH
d. All are correct
19. Cyclic phosphorylation is generally
present in
a. Cyanobacteria b. Algae
c. Bacteria d. Plants
20. Non-cyclic photophosphorylation is also
known as
a. Oxygenic photosynthesis
b. Photosynthesis
c. Anoxygenic photosynthesis
d. Photophosphorylation
21. The number of ATP molecules formed
during cyclic phosphorylation are
a. One b. Two
c. Four d. Six
22. Artificial transformation in laboratory is
carried out by treating the cells with
a. MgCl2 b. Cacl2
c. NaCl d. HCl
23. The process of formation of mesozygote
is called
a. Meromixis b. Exozygote
c. Mitosis d. Meiosis
24. Which of the following organisms
requires tryptophan for growth?
a. H.influenza b. Vibrio
c. Gonococci d. S.typhi
25. Tubercular bacilli grow best in
a. Absence of O2 b. Presence of CO2
c. Presence of O2 d. None of these
26. Mycotoxins are formed during the end of
a. Lag phase b. Log phase
c. Death phase d. Stationary phase
27. Match the following growth
characteristics with their respective
temperature ranges A to E :
1. Psychrotrophs A. Grows between 55 to 65oC
2. Mesophils B. May survive above 60oC
3. Thermophils C. Grow well between 25 to
45oC
4. vegetable bacteria D. Grow below 25oC
E. Multiply slowly at 0-4oC
28. Match the following microorganisms with
their respective sources A to E:
1. Achrommobacter . A. Bread
spp
2. Aspergillus flavus B. Water supply
3. Oscillatiria C. Meat
scytonema
4. Clostridium D. Salad
nigereticans
E. Milk and cheese products
29. Match the following microorganisms with
their respective appearance of colonies
on bismuth Sulphite agar from A to E:
1. Salmonella typhi A. Brown
2. Salmonella B. No growth
choleraesuis
3. Shigella flexneri C. Green
4. Escherichia coli D. Yellow
E. Black
30. The suitable temperature to transport
viral culture is –
a. 30oC b. 5oC
c. 25oC d. 45oC
e. None of these
31. Growth curve does not include following
phases of bacteria –
a. Decline phase b. Stationary phase
c. Lag phase d. Synchronous growth
32. Bacteria are more sensitive to antibiotics
at which phase of growth curve?
a. Decline phase b. Stationary phase
c. Lag phase d. Log phase
