Bacteria MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Bacteria, a fundamental topic in the field of Microbiology. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Bacteria MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Bacteria mcq questions that explore various aspects of Bacteria problems. Each MCQ is crafted to challenge your understanding of Bacteria principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Microbiology tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Bacteria MCQs are your pathway to success in mastering this essential Microbiology topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Bacteria. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Bacteria knowledge to the test? Let's get started with our carefully curated MCQs!

Bacteria MCQs | Page 24 of 33

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Q231.
Which of the following is the suitable temperature range for mesophiles?

a.

20-30°C

b.

25-40°C

c.

>40°C

d.

None of these

Discuss
Answer: (b).25-40°C
Q232.
Exponential phase of growth curve of bacteria is of limited duration because of

a.

rise in cell density

b.

accumulation of toxic metabolites

c.

exhaustion of nutrients

d.

all of these

Discuss
Answer: (d).all of these
Q233.
A culture broth tube was very turbid at the bottom of the tube but clear at the top of the tube indicating that the

a.

broth is sterile

b.

organism can tolerate oxygen

c.

organism cannot produce superoxide dismutase and/or catalase

d.

organism should be grown in an anaerobic chamber

Discuss
Answer: (c).organism cannot produce superoxide dismutase and/or catalase
Q234.
In the exponential phase, the cells and cell mass

a.

first increases then decreases

b.

decreases

c.

are constant

d.

double at a constant rate

Discuss
Answer: (d).double at a constant rate
Q235.
What is the primary source of food for marine life?

a.

Phytoplankton

b.

Zooplankton

c.

Sea weed

d.

Grass

Discuss
Answer: (a).Phytoplankton
Q236.
Postgates assay technique is useful in determining if a cell is viable even though it is

a.

incapable of cell division

b.

too small to see

c.

an obligate aerobe

d.

a thermophile

Discuss
Answer: (a).incapable of cell division
Q237.
What are the extrinsic factors for the microbial growth?

a.

humidity

b.

storage temperature

c.

composition of gas phase

d.

all of these

Discuss
Answer: (d).all of these
Q238.
Quantitative measurement of bacterial growth can be carried out by measuring

a.

cell count

b.

cell mass

c.

cell activity

d.

all of these

Discuss
Answer: (d).all of these
Q239.
Organisms such as lactobacilli that have elaborate requirements for specific nutrients i.e. vitamins and other growth promoting substances, are generally called as

a.

fastidious hetrotrophs

b.

chemo-lithotrophs

c.

chemotrophs

d.

photo-organotrophs

Discuss
Answer: (a).fastidious hetrotrophs
Q240.
The combination of low levels of NaCl, NaNO3 (sodium nitrate), and slightly acid pH can prevent multiplication and toxin formation of

a.

Salmonella

b.

S. aureus

c.

C. botulinum

d.

all of these

Discuss
Answer: (d).all of these
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