What type of infections do coronaviruses cause in humans and birds?

A. Respiratory tract infections

Are Eubacteria generally unicellular or multicellular organisms?

C. Both unicellular and multicellular equally

Everyday Science · Cell Biology & Microorganisms · page 15 of 22

Bacteria MCQs with Answers

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Bacteria, Viruses & Microorganisms MCQs (141–150)

10 MCQs with answers and a short one-liner. Hide answers to test yourself.

Past paper MCQs in this chapter · See all past papers

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141.
What type of infections do coronaviruses cause in humans and birds?
Correct Answer: A. Respiratory tract infections
One-liner
Coronaviruses cause respiratory tract infections in humans and birds.
142.
_ is used in the production of Humulin?
Correct Answer: A. Bacteria
One-liner
Humulin (human insulin) is produced using genetically engineered Bacteria (specifically *Escherichia coli*).
143.
Which kingdom consists of simple eukaryotic organisms that are usually composed of a single cell or a colony of similar cells?
Correct Answer: C. Protista
One-liner
The kingdom consisting of simple eukaryotic organisms, usually single-celled or colonial, is Protista.
144.
Plasmodium was discovered in _?
Correct Answer: A. 1883
One-liner
Plasmodium, the malaria-causing parasite, was discovered in 1883 by Charles Louis Alphonse Laveran.
145.
Naturally occurring enzyme used as a defense chemical by bacteria ?
Correct Answer: C. Restriction enzyme
One-liner
Bacteria use restriction enzymes as a natural defense mechanism to cut foreign DNA (such as viral DNA) at specific recognition sites.
146.
Are Eubacteria generally unicellular or multicellular organisms?
Correct Answer: A. Unicellular
One-liner
Eubacteria are generally unicellular organisms.
147.
Which of the following may cause flu?
Correct Answer: C. Virus
One-liner
Flu (influenza) is caused by a virus, specifically the influenza virus.
148.
Which of the following is/are unicellular organisms?
Correct Answer: D. All of these
One-liner
Bacteria, protozoa, and yeast are all unicellular organisms, so the correct answer is All of these.
149.
Past Paper MCQ
In which decade did scientists first identify the coronavirus in animals?
Correct Answer: D. 1920s
One-liner
Scientists first identified coronavirus in animals in the 1920s, when it was discovered in chickens.
150.
The infective stage of Entamoeba histolytica is ?
Correct Answer: A. Trophozoite
One-liner
The infective stage of Entamoeba histolytica is the trophozoite stage.

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Bacteria MCQs with Answers

Bacteria, Viruses & Microorganisms MCQs (141–150)

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