Match the following :a. Bacteriology1. The study of parasitesb. Mycology2. The study of protozoac. Protozoology3. The study of fungid. Parasitology4. The study of BacteriaChoose the most appropriate option from below :

The correct matching is a-4, b-3, c-2, d-1.Bacteriology is the study of bacteria.Mycology (Greek mykes, fungus) is the study of fungi.Protozoology is the study of protozoa.Parasitology is the study of parasites.Each name carries its own subject, so the matching can be read straight off the words. Every other code pairs at least one branch with the wrong organisms, for example mycology with protozoa.

Micro Organisms Questions and Answers

Q: Rod-shaped bacteria are called

Correct answer: BacillusRod-shaped bacteria are bacilli. Spherical ones are cocci, comma-shaped ones vibrios, and rigid helical ones spirilla. Note that bacillus describes the shape, while Bacillus with a capital is a particular genus.

Q: _______ are the agents that act as carriers of a pathogen and spread diseases.

Correct answer: VectorsA vector is an organism - usually an insect - that carries a pathogen from one host to another: the Anopheles mosquito for malaria, Aedes for dengue, the housefly for typhoid. Controlling the vector is often easier than treating the disease.

Q: Milk, if left out of the refrigerator will quickly go sour. Which one of the following statements is incorrect?

Correct answer: Viruses cause milk to go sour faster.Milk sours because bacteria ferment its lactose to lactic acid - viruses have nothing to do with it. The other three statements are true: warmth speeds bacterial growth, bacteria are the cause, and the souring is the acid produced.

Q: The shape of a bacillus is generally

Correct answer: Rod likeA bacillus is rod-shaped. Cocci are spherical, vibrios comma-shaped and spirilla helical.

Q: The process by which the amount of nitrogen in the atmosphere stays constant is known as the

Correct answer: nitrogen cycleThe nitrogen cycle keeps atmospheric nitrogen roughly constant: fixation by bacteria and lightning removes N2 from the air, and denitrification returns it. The two processes balance, so the atmosphere stays at about 78% nitrogen.

Q: The status of algae in the aquatic food chain is

Correct answer: producersAlgae photosynthesise, so they make their own food from CO2 and sunlight and stand at the base of the aquatic food chain as producers. Everything else in the water ultimately depends on them - and on the oxygen they release, which is a large share of the world’s supply.

Q: Prokaryotes do not have a

Correct answer: Nuclear membraneA prokaryote has no nuclear membrane - its chromosome lies free in the cytoplasm as a nucleoid. It does have cytoplasm, ribosomes (of the 70S kind) and a chromosome; what it lacks is that membrane and the other membrane-bound organelles.

Q: To which one of the following types of organism do mushrooms belong?

Correct answer: FungiA mushroom is the fruiting body of a fungus. The organism itself is the mycelium spreading through soil or wood; the mushroom appears only to release spores.

Q: Watering crops is called

Correct answer: irrigationSupplying water to crops is irrigation. Sowing is putting the seed in the ground, tilling is loosening the soil beforehand, and manuring is adding nutrients.

Match the following :

a. Bacteriology	1. The study of parasites
b. Mycology	2. The study of protozoa
c. Protozoology	3. The study of fungi
d. Parasitology	4. The study of Bacteria

Choose the most appropriate option from below :

A.a-1, b-2, c-3, d-4
B.a-4, b-3, c-2, d-1
C.a-3, b-1, c-4, d-2
D.a-2, b-4, c-1, d-3

Exam Year(s)

RSMSSB - 2025, RSMSSB Lab Technician - 2025,

Answer: B

The correct matching is a-4, b-3, c-2, d-1.

Bacteriology is the study of bacteria.
Mycology (Greek mykes, fungus) is the study of fungi.
Protozoology is the study of protozoa.
Parasitology is the study of parasites.

Each name carries its own subject, so the matching can be read straight off the words. Every other code pairs at least one branch with the wrong organisms, for example mycology with protozoa.

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Rod-shaped bacteria are called

A.Bacillus
B.Coccus
C.Vibrio
D.Spirillum

Answer: A

Correct answer: Bacillus

Rod-shaped bacteria are bacilli. Spherical ones are cocci, comma-shaped ones vibrios, and rigid helical ones spirilla. Note that bacillus describes the shape, while Bacillus with a capital is a particular genus.

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_______ are the agents that act as carriers of a pathogen and spread diseases.

A.Vectors
B.Microbes
C.Parasites
D.DNA

Answer: A

Correct answer: Vectors

A vector is an organism - usually an insect - that carries a pathogen from one host to another: the Anopheles mosquito for malaria, Aedes for dengue, the housefly for typhoid. Controlling the vector is often easier than treating the disease.

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Milk, if left out of the refrigerator will quickly go sour.
Which one of the following statements is incorrect?

A.The higher the temperature, the faster the milk will go sour.
B.Bacterial action causes the milk to go sour.
C.Viruses cause milk to go sour faster.
D.As milk goes sour, it becomes more acidic.

Answer: C

Correct answer: Viruses cause milk to go sour faster.

Milk sours because bacteria ferment its lactose to lactic acid - viruses have nothing to do with it. The other three statements are true: warmth speeds bacterial growth, bacteria are the cause, and the souring is the acid produced.

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The shape of a bacillus is generally

A.Spherical
B.Comma shaped
C.Rod like
D.Spiral

Answer: C

Correct answer: Rod like

A bacillus is rod-shaped. Cocci are spherical, vibrios comma-shaped and spirilla helical.

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The process by which the amount of nitrogen in the atmosphere stays constant is known as the

A.fermentation
B.carbon cycle
C.nitrogen cycle
D.photosynthesis

Answer: C

Correct answer: nitrogen cycle

The nitrogen cycle keeps atmospheric nitrogen roughly constant: fixation by bacteria and lightning removes N₂ from the air, and denitrification returns it. The two processes balance, so the atmosphere stays at about 78% nitrogen.

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The status of algae in the aquatic food chain is

A.consumers
B.producers
C.host
D.small in size

Answer: B

Correct answer: producers

Algae photosynthesise, so they make their own food from CO₂ and sunlight and stand at the base of the aquatic food chain as producers. Everything else in the water ultimately depends on them - and on the oxygen they release, which is a large share of the world’s supply.

Discuss in Forum

Prokaryotes do not have a

A.Cytoplasm
B.Ribosome
C.Nuclear membrane
D.Chromosomes

Answer: C

Correct answer: Nuclear membrane

A prokaryote has no nuclear membrane - its chromosome lies free in the cytoplasm as a nucleoid. It does have cytoplasm, ribosomes (of the 70S kind) and a chromosome; what it lacks is that membrane and the other membrane-bound organelles.

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To which one of the following types of organism do mushrooms belong?

A.Algae
B.Ferns
C.Fungi
D.Lichens

Answer: C

Correct answer: Fungi

A mushroom is the fruiting body of a fungus. The organism itself is the mycelium spreading through soil or wood; the mushroom appears only to release spores.

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10.

Watering crops is called

A.sowing
B.manuring
C.tilling
D.irrigation

Answer: B

Correct answer: irrigation

Supplying water to crops is irrigation. Sowing is putting the seed in the ground, tilling is loosening the soil beforehand, and manuring is adding nutrients.

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