NEET | Microbes in Human Welfare | Medium Level Online Test

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Each question carries 4 scores. For each incorrect response, 1 score will be deducted.

Question 1

Lactic Acid Bacteria (LAB) can
i) Converts milk to curd
ii) Partially digest casein
iii) Increases cyanocobalamin (Vitamin B12)

(a) i & ii are correct (b) i & iii are correct (c) ii & iii are correct (d) All are correct

Question 2

Propionibacterium sharmanii and Penicillium roqueforti are concerned with

(a) Cheese (b) Clot buster (c) Statin (d) Sewage treatment

Question 3

Choose the correct combination.

(a) Aspergillus niger - Citric acid (b) Trichoderma polysporum - Butyric acid (c) Streptococcus - Pectinase (d) Monascus purpureus - Lactic acid

Question 4

Select the mismatching set.

(a) Penicillin, Fleming, Staphylococci (b) Baculovirus, IPM, Biocontrol (c) Cyanobacteria, nitrogen fixation, biofertilisers (d) LAB, ethanol, cheese

Question 5

Of the following, select the beverages that are not distilled.

(a) Wine & Whisky (b) Beer & Brandy (c) Wine & Beer (d) Beer & Rum

Question 6

Saccharomyces cerevisiae is also known as

(a) Methanogen (b) Baker’s yeast (c) Brewer’s yeast (d) Both B & C

Question 7

Some statements related to antibiotics are given below:
i. Very effective against viral diseases.
ii. Produced by microbes and used to kill pathogens.
iii. Used to treat Plague, Pertussis, Leprosy etc.
iv. Magic medicines with least side effects.

(a) i & iii are correct (b) ii & iii are correct (c) i & iv are correct (d) iii & iv are correct

Question 8

Select the odd man out.

(a) Acetobacter aceti (b) Aspergillus niger (c) Clostridium butylicum (d) Lactobacillus

Question 9

Which is correct statement?

(a) Lipases are used in detergents to remove all types of stains from the laundry. (b) Cyclosporine A is used as immunosuppressive agent which increases the power of immune system. (c) Statin is produced by yeast and used to inhibit the enzymes responsible for synthesis of cholesterol. (d) A bacterium, Aspergillus niger, is used to produce citric acid.

Question 10

Cyclosporine A is

(a) Clot buster (b) Immunosuppressive agent (c) Stain remover (d) Blood cholesterol lowering agent

Question 11

Which of the following is known as ‘clot buster’?

(a) Streptokinase (b) Protease (c) Pectinase (d) Lipase

Question 12

Choose the correct sequence of steps of sewage treatment in STP.

(a) Filtration & sedimentation - settling tank - aeration tank - sludge digester (b) Filtration & sedimentation - aeration tank - settling tank - sludge digester (c) Aeration tank - Filtration & sedimentation - sludge digester - settling tank (d) Settling tank - sludge digester - aeration tank - Filtration & sedimentation

Question 13

In sewage treatment, flocs means

(a) Masses of bacteria and fungal filaments (b) Anaerobic bacteria in sludge digester (c) The effluent formed after primary treatment (d) A part of activated sludge

Question 14

BOD means

(a) Biological oxygen demand (b) Biochemical oxygen demand (c) Biological oxygen deficiency (d) Both A & B

Question 15

During sewage treatment, biogas is produced in

(a) Aeration tank (b) Anaerobic sludge digesters (c) Settling tank (d) All the above

Question 16

IARI and KVIC are related with

(a) IPM program (b) Sewage treatment (c) Biogas plant (d) Biofertilizers

Question 17

Methanobacterium is related to

(a) Biogas (b) Cellulose digestion (c) Rumen of cattle (d) All of these

Question 18

Choose the wrong combination.

(a) Azospirillum - Nitrogen fixation (b) Cyanobacteria - Nostoc (c) Trichoderma - Biofertilisers (d) Methanobacterium - Rumen

Question 19

Odd man out.

(a) Rhizobium (b) Mycorrhiza (c) Cyanobacterium (d) Bacillus thuringiensis

Question 20

Consider the following statements:
i. Glomus absorbs phosphorous from soil and passes to the plant.
ii. Azospirillum & Azotobacter are biocontrol agents.
iii. Primary sewage treatment is also known as biological treatment.
iv. In sewage treatment, both aerobic and anaerobic bacteria take part.

(a) ii & iii are correct (b) i & iv are correct (c) i & ii are correct (d) iii & iv are correct

Question 21

Which of the following is microbial biocontrol agent?

(a) Trichoderma (b) Anabaena (c) Nostoc (d) Glomus

Question 22

Bacillus thuringiensis helps to control

(a) Viral infection (b) Aphids (c) Butterfly caterpillar (d) Grubs

Question 23

An important biofertiliser found in paddy fields is

(a) Blue green algae (b) Mycorrhiza (c) Nucleopolyhedrovirus (d) All

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