Yeast is used in the production of

1

(a)

sugar

(b)

alcohol

(c)

hydrochloric acid

(d)

oxygen

Carrier of malaria-causing protozoan is

1

(a)

female Anopheles mosquito

(b)

cockroach

(c)

housefly

(d)

butterfly

Alcohol is produced with the help of

1

(a)

sodium chloride

(b)

yeast

(c)

nitrogen

(d)

carbon dioxide

The disease caused by a protozoan and spread by an insect is

1

(a)

dengue

(b)

malaria

(c)

polio

(d)

measles

Pathogenic microorganisms present in host cells are killed by medicines called

1

(a)

pain killer

(b)

antibodies

(c)

antibiotics

(d)

vaccines

This bacterium promotes the formation of milk into curd:

1

(a)

rhizobium

(b)

lactobacillus

(c)

aedes

(d)

all

This micro-organism is used for the large-scale production of alcohol, wine and acetic acid:

1

(a)

amoeba

(b)

paramecium

(c)

chlamydomonas

(d)

yeast

Nitrogen fixation is brought about by :

1

(a)

blue-green algae

(b)

bacteria

(c)

both (a) and (b)

(d)

none of these

Which is not a communicable disease?

1

(a)

Diabetes

(b)

Chicken pox

(c)

Tuberculosis

(d)

Cholera

Which is the plant disease caused by microorganisms?

1

(a)

Measles

(b)

Small pox

(c)

Citrus Canker

(d)

Polio

Microorganisms can be seen with the help of a ____________________

1

(a)

microscope

Blue green algae fix __________ directly from air and enhance fertility of soil.

1

(a)

nitrogen

Alcohol is produced with the help of________________

1

(a)

yeast

Some _______ and _______ present in the soil fix nitrogen from the atmosphere.

1

(a)

bacteria, blue-green algae

Protozoans cause serious diseases such as _______ and ________.

1

(a)

Typhoid and Tuberculosis

All microbes are disease causing

1

(a) True

(b) False

Microorganisms can be seen with naked eyes

1

(a) True

(b) False

Foot and mouth disease is a bacterial disease in animals.

1

(a) True

(b) False

Microorganisms can be found only in air and water.

1

(a) True

(b) False

Viruses can be seen by simple microscopes.

1

(a) False

(b) True