Viruses are called non-cellular infectious entities because _?

D. They cause infections, and can only replicate inside living cells

A. They lack a cell wall and cell membrane

B. They can survive and multiply independently outside a host

C. They are composed of only proteins and no genetic material

D. They cause infections, and can only replicate inside living cells

Which option is CORRECT about endospore?

A. It is a reproductive structure in bacteria

C. It is found in all bacterial cells

D. It is a type of fungal spore

Everyday Science · Cell Biology & Microorganisms · page 17 of 22

Bacteria MCQs with Answers

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Bacteria, Viruses & Microorganisms MCQs (161–170)

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161.
The complete, mature and infectious particle of a virus is known as?
Correct Answer: C. Virion
One-liner
The complete, mature and infectious viral particle is called a virion.
162.
Viruses are called non-cellular infectious entities because _?
Correct Answer: D. They cause infections, and can only replicate inside living cells
One-liner
Viruses are called non-cellular infectious entities because they cause infections, and can only replicate inside living cells.
163.
Which option is CORRECT about endospore?
Correct Answer: B. Endures extreme condition
One-liner
An endospore is a dormant, tough, non-reproductive structure that endures extreme conditions such as heat, radiation, desiccation, and chemicals.
164.
What does HMPV stand for?
Correct Answer: A. Human Metapneumo Virus
One-liner
HMPV stands for Human Metapneumo Virus.
165.
What is the main component of a virus?
Correct Answer: D. Nucleic Acid
One-liner
The main component of a virus is Nucleic Acid, which carries its genetic material (either DNA or RNA).
166.
Bacterial genome becomes diploid _?
Correct Answer: A. During binary fission
One-liner
Bacterial genome becomes diploid during binary fission when the replicated DNA is segregated into two daughter cells.
167.
The cause of malaria is _?
Correct Answer: C. Plasmodium
One-liner
Malaria is caused by Plasmodium, a protozoan parasite transmitted to humans through the bite of infected female Anopheles mosquitoes.
168.
Genetic recombination in bacteria can occur through ?
Correct Answer: A. Conjugation
One-liner
Genetic recombination in bacteria can occur through conjugation, a process involving direct cell-to-cell contact and transfer of genetic material via a pilus.
169.
What type of organism are bacteria classified as?
Correct Answer: B. Parasites
One-liner
Bacteria are classified as parasites because they obtain nutrition by living on or inside a host organism, often causing harm.
170.
Which bacteria oxidize sulfide to sulfur and sulfur to sulfate?
Correct Answer: C. Thiobacillus
One-liner
Thiobacillus is the bacterium that oxidizes sulfide to sulfur and sulfur to sulfate.

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Bacteria MCQs with Answers

Bacteria, Viruses & Microorganisms MCQs (161–170)

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