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 15 of 33

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Q141.
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
Q142.
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
Q143.
What is the primary source of food for marine life?

a.

Phytoplankton

b.

Zooplankton

c.

Sea weed

d.

Grass

Discuss
Answer: (a).Phytoplankton
Q144.
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
Q145.
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
Q146.
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
Q147.
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
Q148.
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
Q149.
Bacteria of genus Nitrosomonas use __________ as their electron source.

a.

ammonia

b.

H2S

c.

succinate

d.

light

Discuss
Answer: (a).ammonia
Q150.
All organisms require at least small amounts of carbondioxide, However, some can use CO2 as their sole source of carbon. Such organisms are termed as

a.

autotrophs

b.

phototrophs

c.

chemotrophs

d.

photo-organotrophs

Discuss
Answer: (a).autotrophs
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