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 27 of 33

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Q261.
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
Q262.
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
Q263.
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
Q264.
Bacteria of genus Nitrosomonas use __________ as their electron source.

a.

ammonia

b.

H2S

c.

succinate

d.

light

Discuss
Answer: (a).ammonia
Q265.
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
Q266.
The generation time of a culture that produces two generations per hour is

a.

greater than that produces three generations per hour

b.

lesser than that produces three generations per hour

c.

equal to that produces three generations per hour

d.

none of the above

Discuss
Answer: (a).greater than that produces three generations per hour
Q267.
Autotrophic bacteria are those which

a.

make their own food

b.

form a long chain glycocalyx

c.

are highly susceptible to penicillin

d.

produce a blue-green pigment

Discuss
Answer: (a).make their own food
Q268.
Which of the following organisms typically get their carbon for biosynthesis from organic compounds?

a.

Aerobic, glucose-respiring bacteria (aerobic respiration)

b.

Ammonia-oxidizing bacteria (chemolithotrophic bacteria)

c.

Photosynthetic cyanobacteria (phototrophic metabolism)

d.

None of the above

Discuss
Answer: (a).Aerobic, glucose-respiring bacteria (aerobic respiration)
Q269.
An organism is completely dependent on atmospheric O2 for growth. This organism is

a.

osmotolerant

b.

acidophile

c.

facultative anaerobe

d.

obligate aerobe

Discuss
Answer: (d).obligate aerobe
Q270.
Microaerophilic bacteria are those which require

a.

21 % oxygen for growth

b.

low levels of oxygen for growth (lesser than O2 present in atmosphere)

c.

oxygen for activation of enzymes

d.

none of the above

Discuss
Answer: (b).low levels of oxygen for growth (lesser than O2 present in atmosphere)
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