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Worksheets

MICROBES IN HUMAN WELFARE

Total questions: 30

Worksheet time: 30mins

Name
Class
Date
1.

Which of the following organisms is used in the production of beverages?

a)

Penicillium notatum

b)

Saccharomyces cerevisiae

c)

Aspergillus niger

d)

Clostridium butylicum

2.

Which of the following bacteria has a role in removing clots from our blood vessels?

a)

Bacillus thuringiensis

b)

Clostridium butylicum

c)

Streptococcus

d)

Lactobacillus

3.

The bio-active molecule cyclosporin A is used in –

a)

whooping cough

b)

diphtheria

c)

leprosy

d)

organ-transplant patients

4.

The primary treatment of sewage involves –

a)

digestion

b)

decomposition

c)

sedimentation and filtration

d)

none of these

5.

Biogas contains –

a)

CO2

b)

H2S

c)

CH4

d)

all of these

6.

The bacterium that commonly lives in animal and human intestines is –

a)

Bacillus anthraces

b)

Vibrio cholerae

c)

Escherichia coli

d)

Corynebacterium

7.

Streptomycin is produced from –

a)

Streptomyces scoleus

b)

Streptomyces griseus

c)

Streptomyces fradiae

d)

Streptomyces venezuellae

8.

Which one of the following sets includes bacterial diseases?

a)

Tetanus, tuberculosis, measles

b)

Diphtheria , leprosy, plague

c)

Cholera, typhoid, mumps

d)

Malaria, mumps, poliomyelitis

9.

Which of the following serve as biofertilizer in paddy fields?

a)

Bacteria

b)

Yeast

c)

Cyanobacteria

d)

Fungi

10.

The nutritive media for growing bacteria and other microorganisms in the laboratory is called –

a)

colonies

b)

culture media

c)

baking media

d)

fermentation

11.

The technology of biogas production in India has been developed by the efforts of

A. Khadi and Village Industries Commision (KVIC)

B. Indian Council of Agricultural Research (IARI)

C. Indian Agricultural Research Institute (IARI)

D. Indian Council of Medical Research (ICMR)

a)

A, C, D

b)

C, D

c)

A, C

d)

A, B

12.

The large vessels for growing microbes on an industrial scale are called

a)

Petri dish

b)

Digestors

c)

Biogas vessel

d)

Fermentors.

13.

Which role is played by lactic acid bacteria (LAB) in our stomach?

a)

Beneficial

b)

Harmful

c)

Neutral

d)

All of these

14.

The gas responsible for puffing-up appearance of dough comes from –

a)

aerobic respiration

b)

fermentation

c)

photosynthesis

d)

photorespiration

15.

In cheese manufacture, the micro-organisms are used for –

a)

the souring of milk only

b)

the ripening only

c)

development of resistance to spoilage

d)

Both a and b

16.

Which of the following bacteria help in nitrogen fixation from atmosphere?

A. Azotobacter

B. Rhizobium

C. Azospirillum

D. Lactobacillus

a)

A, C, D

b)

A, B, C, D

c)

B, C, D

d)

A, B, C

17.

The symbiotic association between fungi and roots of higher plants is called –

a)

lichen

b)

mycorrhiza

c)

biofertilizer

d)

BOD

18.

The amount of oxygen required by the microbes in the decomposition of organic matter is called –

a)

chemical oxygen demand

b)

biochemical oxygen demand

c)

total oxygen demand

d)

dissolve oxygen

19.

improved water quality can be achieved by

a)

appropriate use of water

b)

careful water storage and handling

c)

proper land management

d)

all of the above

20.

What is the first step in the water treatment process?

a)

coagulation

b)

filtration and removal of debris, sand, grit, etc.

c)

flocs

d)

concentation

21.
What is the role of bacteria in the water purification process?
a)
digested organic matter
b)
add chlorine
c)
nothing, we don't want them in there
d)
add nutrients to the sludge
22.
What gas must be maintained at precise levels in the aeration tank?
a)
CO2
b)
O2
c)
H2
d)
CO
23.

What is a sewage treatment plant?

a)

The place where water is cleaned, filtered and tested before re-entering the water cycle.

b)

The place where water is cleaned, filtered and tested before going to our houses.

c)

The network of pipes that carry sewage (dirty water) from our houses.

d)

The place where water is bottled for drinking.

24.

The semi-solid organic material that comes out of a wastewater treatment plant after completion of the wastewater treatment process is called

a)

wastewater.

b)

pathogenic.

c)

sewage.

d)

sludge.

25.

What is effluent?

a)

the suspended solids in the water

b)

the partially treated wastewater moving through the facility

c)

the solids that come out of the digesters

d)

water-borne diseases

26.

What happens in the digesters?

a)

aerobic bacteria processes organic waste

b)

organic waste is turned into usable fertilizer

c)

anaerobic bacteria processes organic waste

d)

chlorine is added to disinfect biosolids

27.

What is produced in the digesters?

a)

methane gas

b)

chlorine

c)

fertilizer

d)

effluent

28.

Process used in water treatment process where water is pushed through screens, sand, gravel and coal to remove organisms and trash

a)

filtration

b)

chlorination

c)

coagulation

d)

bioreactors

29.

After the clarification step in wastewater treatment, the solid waste called ______ is sold off and the liquid waste called _____ moves on the be filtered and disinfected

a)

sewage and dirty water

b)

sludge and effluent

c)

effluent and slude

d)

dirty water and sewage

30.

Preliminary treatment

a)

prevents toxic chemicals.

b)

removes large objects.

c)

is unnecessary.

d)

is useless.