Microbes in Human Welfare (last 10 years)

Question 1

1. Identify the microorganism which is responsible for the production of an immunosuppressive molecule cyclosporin A: (2022)

a. Streptococcus cerevisiae
b. Trichoderma polysporum
c. Clostridium butylicum
d. Aspergillus niger

Answer 1

b. Trichoderma polysporum

Question 2

2. Match List-I with List-II. (2021)

List-I List-II

(A) Aspergillus niger (i) Acetic Acid

(B) Acetobacter aceti (ii) Lactic Acid

(C) Clostridium butylicum (iii) Citric Acid

(D) Lactobacillus (iv) Butyric acid

Choose the correct answer from the options given below.
a. A-i B-ii C-iii D-iv
b. A-ii B-iii C-i D-iv
c. A-iv B-ii C-i D-iii
d. A-iii B-i C-iv D-ii

Answer 2

d. A-iii B-i C-iv D-ii

Question 3

3. Match the following columns and select the correct option. (2020)

Column-I Column-II

1. Clostridium butylicum (i) Cyclosporin-A
2. Trichoderma polysporum (ii) Butyric acid
3. Monascus purpureus (iii) Citric acid
4. Aspergillus niger (iv) Blood cholesterol lowering agent(1) (2) (3) (4)
   a. (ii) (i) (iv) (iii)
   b. (i) (ii) (iv) (iii)
   c. (iv) (iii) (ii) (i)
   d. (iii) (iv) (ii) (i)

Answer 3

a. (ii) (i) (iv) (iii)

Question 4

4. For the commercial and industrial production of Citric Acid, which of the following microbes is used? (2020-Covid)

a. Lactobacillus sp
b. Saccharomyces cerevisiae
c. Clostridium butylicum
d. Aspergillus niger

Answer 4

d. Aspergillus niger

Question 5

5. Cyclosporin A, used as immuno-suppression agent, is produced from: (2020-Covid)

a. Saccharomyces cerevisiae
b. Penicillium notatum
c. Trichoderma polysporum
d. Monascus purpureus

Answer 5

c. Trichoderma polysporum

Question 6

6. Match the following organisms with the products they produce (2019)

A. Lactobacillus i. Cheese

B. Saccharomyces cerevisiae ii. Curd

C. Aspergillus niger iii. Citric Acid

D. Acetobacter aceti iv. Bread

                                                                                     v. Acetic Acid

Select the correct option.

(A) (B) (C) (D) a. (ii) (iv) (v) (iii) b. (ii) (iv) (iii) (v) c. (iii) (iv) (v) (i) d. (ii) (i) (iii) (v)

Answer 6

b. (ii) (iv) (iii) (v)

Question 7

7. Which of the following is a commercial blood cholesterol lowering agent? (2019)

a. Cyclosporin A
b. Statin
c. Streptokinase
d. Lipases

Answer 7

b. Statin

Question 8

8. Conversion of milk to curd improves its nutritional value by increasing the amount of: (2018)

a. Vitamin D
b. Vitamin A
c. Vitamin B12
d. Vitamin E

Answer 8

c. Vitamin B12

Question 9

9. Which of the following is correctly matched for the product produced by them? (2017-Delhi)

a. Acetobacter aceti : Antibiotics
b. Methanobacterium : Lactic acid
c. Penicillium notatum : Acetic acid
d. Saccharomyces cerevisiae : Ethanol

Answer 9

d. Saccharomyces cerevisiae : Ethanol

Question 10

10. Match Column-I with Column-II and select the correct option using the codes given below
    (2016-II)

Column-I Column-II

A. Citric acid i. Trichoderma

B. Cyclosporin A ii. Clostridium

C. Statins iii. Aspergillus

D. Butyric acid iv. Monascus

Codes:
a. A-i B-iv C-ii D-iii
b. A-iii B-iv C-i D-ii
c. A-iii B-i C-ii D-iv
d. A-iii B-i C-iv D-ii

Answer 10

d. A-iii B-i C-iv D-ii

Question 11

11. Which of the following is wrongly matched in the given table? (2016-I)

Microbe Product Application

a. Trichoderma Cyclosporin A Immunosuppressive drug

b. Monascus Statins Lowering of blood cholesterol

c. Streptococcus Streptokinase Removal of clot from blood vessel

d. Clostridium butylicum Lipase Removal of oil stains

Answer 11

Microbe Product Application
d. Clostridium butylicum Lipase Removal of oil stains

Question 12

12. Match the following list of microbes and their importance: (2015 Re)

A. Saccharomyces i. Production of immunosuppressive agents
cerevisiae

B. Monascus ii. Ripening of Swiss cheese
purpureus

C. Trichoderma iii. Commercial production of ethanol
polysporum

D. Propionibacterium iv. Production of blood cholesterol lowering
sharmanii

a. A-iv B-iii C-ii D-i
b. A-iv B-ii C-i D-iii
c. A-iii B-i C-iv D-ii
d. A-iii B-iv C-i D-ii

Answer 12

d. A-iii B-iv C-i D-ii

Question 13

13. A good producer of citric acid is: (2013)

a. Saccharomyces
b. Aspergillus
c. Pseudomonas
d. Clostridium

Answer 13

b. Aspergillus

Question 14

14. Which of the following is put into Anaerobic sludge digester for further sewage treatment? (2020)

a. Floating debris
b. Effluents of primary treatment
c. Activated sludge
d. Primary sludge

Answer 14

c. Activated sludge

Question 15

15. Which of the following in sewage treatment removes suspended solids? (2017-Delhi)

a. Tertiary treatment
b. Secondary treatment
c. Primary treatment
d. Sludge treatment

Answer 15

c. Primary treatment

Question 16

16. During sewage treatment, biogases are produced which include: (2013)

a. Hydrogen sulphide, nitrogen, methane
b. Methane, hydrogen sulphide, carbon dioxide
c. Methane, oxygen, hydrogen sulphide
d. Hydrogen sulphide, methane, sulphur dioxide

Answer 16

b. Methane, hydrogen sulphide, carbon dioxide

Question 17

17. Match the following columns and select the correct option: (2020-Covid)

Column-I Column-II

1. Dragonflies (i) Biocontrol agents of several plant pathogens
2. Bacillus thuringiensis (ii) Get rid of Aphids and mosquitoes
3. Glomus (iii) Narrow spectrum insecticidal applications
4. Baculoviruses (iv) Biocontrol agents of lepidopteran plant pests

                              (v) Absorb phosphorus from soil

   (1) (2) (3) (4)
   a. (ii) (i) (iii) (iv)
   b. (ii) (iii) (iv) (v)
   c. (ii) (iv) (v) (iii)
   d. (iii) (v) (iv) (i)

Answer 17

(1) (2) (3) (4)
c. (ii) (iv) (v) (iii)

Question 18

18. Which of the following can be used as a biocontrol agent in the treatment of plant disease? (2019)

a. Trichoderma
b. Chlorella
c. Anabaena
d. Lactobacillus

Answer 18

a. Trichoderma

Question 19

19. Select the correct group of biocontrol agents. (2019)

a. Bacillus thuringiensis, Tobacco mosaic virus, Aphids
b. Trichoderma, Baculovirus, Bacillus thuringiensis
c. Oscillatoria, Rhizobium, Trichoderma
d. Nostoc, Azospirillium, Nucleopolyhedrovirus

Answer 19

b. Trichoderma, Baculovirus, Bacillus thuringiensis