I. Start the exam by click the “Start” button
Bacterial Growth- Part 1
See all quizzes of Bacterial Growth here:
1 Multiple antibiotic resistance is mediated
by
a. Episome b. Plasmid
c. Colplasmid d. Both b and c
2. “Antagonism “ is seen in
a. Lag phase b. Plasmids
c. Log phase d. None of these
3. the first phase of a growth curve is
a. Log phase b. Lag phase
c. γ phase d. Both a and b
4. In gram positive and gram negative
bacteria the electron transport contains
a. Naphthquinone b. Plastoquinone
c. Ubiquinone d. Both a and b
5. Growth in a closed system, affected by
nutrient limitation and waste product
accumulation is called
a. Batch culturing b. Ascus
c. Fruiting body d. Sporangiosphore
6. Cells are active and synthesizing new
protoplasm. This stage of growth is called
a. Lag phase b. Stationary phase
c. Log phase d. All of these
7. Which one of the following tissues can
metabolize glucose, fatty acids and
ketone bodies for ATP production?
a. Liver b. Muscle
c. Brain d. R.B.C
8. Which one of the following mineral
elements play an important role in
biological nitrogen fixation
a. Copper b. Magnesium
c. Zinc d. Molybdenum
9. Rapid bacterial growth phase is known as
a. Log b. Lag
c. Lack d. None of these
10. Clostridium welchii spore formation can
be induced only on specified media such
as
a. Wilson-Blair medium
b. Macconkey medium
c. Ellner medium
d. Thayee-Martion medium
11. Mycotoxins are formed during the end of
a. Lag phase b. Log phase
c. Death phase d. Stationary phase
12. Bacteria which need oxygen for growth
are called
a. Thermophilic bacteria
b. Microaerophilic bacteria
c. Facultative anaerobic bacteria
d. Mycobacteria
13. pH required for the growth of bacteria is
a. 6.8 – 7.2 b. 5.6 – 8.2
c. 3.0 – 6.0 d. 8.0 – 14.0
14. Drug resistance in bacteria is mainly
determined by factor:
a. F b. R
c. Col d. Lysogenic factor
15. The ion that is required in trace amounts
for the growth of bacteria is
a. Calcium b. Magnesium
c. Cobalt d. Sodium
16. The most important vitamin for the
growth of bacteria is
a. B-complex b. Vitamin A
c. Vitamin D d. Vitamin C
17. The principle in microbiological assays is
a. At certain range the concentration of growth
factor will bear a linear relationship to the
amount of nutrients added
b. Concentration of growth factor have a linear
relationship with the growth of the organism
c. Both a and b
d. None of the above
18. If the source of energy for bacteria is from
chemical compounds they are said to be
a. Phototrophs
b. Autotrophs
c. Chemotrophs
d. Chemolithotroph
19. In the synthesis of cell components the
major element required is
a. Nitrogen b. Sulphur
c. Carbon d. Oxygen
20. For the formation of cell-components the
elements required are
a. Nitrogen b. Oxygen
c. Sulphur d. All of these
21. For the synthesis of amino acids cysteine,
cystine and methionine the element
required is
a. Sulphur b. Oxygen
c. Nitrogen d. None of these
22. Sulphur can be utilized by bacteria in the
form of
a. Organic compounds
b. Inorganic compounds
c. Elemental compounds
d. All of the above
23. Phosphorous is an essential component
of
a. Nucleotides
b. Nucleic acids
c. Phospholipids and Heichoic acids
d. All the above
24. Trace elements are
a. Zn+2, Cu+2, Mn+2
b. MO6+, Ni2+, B3+ and CO2+
c. Both a and b
d. None of these
25. Most bacteria do not require the ion
a. Mg2+ b. Ca2+
c. Na+ d. Fe+2
26. Vitamin function as
a. Co-enzymes
b. Co-melecules
c. Building blocks of cell
d. None of these
27. The vitamin required for Lactobacillus
species is
a. Riboflavin b. Niacin
c. Pyridoxine d. Folic acid
28. Vitamin K is necessary for the species
a. Lactobacillus spp.
b. Bacillus anthracis
c. Bacteroides melaninogenicus
d. All of these
29. The bacteria which are able to grow at
0°C but which grow at 20°C to 30°C, are
known as
a. Psychrophiles
b. Facultative psychrophiles
c. Average psychrophiles
d. Mesophiles
30. Radical shifts can be prevented by adding
a. Acids b. Alkali
c. Buffer d. None of these
