NEET Topic-wise & A
Topic 1: MICROBES IN HOUSEHOLD & INDUSTRIAL PRODUCTS
NEET: Previous Years Questions
01. Match List I with List II.
Choose the correct answer from the options given below:
(1) A-III, B-I, C-II, D-IV
(2) A-II, B-IV, C-III, D-I
(3) A-III, B-I, C-IV, D-II
(4) A-IV, B-I, C-III, D-II (NEET 2024)
✅ (3) A-III, B-I, C-IV, D-II
02. Match List - I with List - II.
Choose the correct answer from the options given below.
(a) (b) (c) (d)
(1) (iii) (i) (iv) (ii)
(2) (i) (ii) (iii) (iv)
(3) (ii) (iii) (i) (iv)
(4) (iv) (ii) (i) (iii) (NEET 2021)
✅ (1) (iii) (i) (iv) (ii)
03. Match the following columns and select the correct option.
(a) (b) (c) (d)
(1) (i) (ii) (iv) (iii)
(2) (iv) (iii) (ii) (i)
(3) (iii) (iv) (ii) (i)
(4) (ii) (i) (iv) (iii) (NEET 2020)
✅ (4) (ii) (i) (iv) (iii)
04. Match the following organisms with the products they produce.
Select the correct option.
(a) (b) (c) (d)
(1) ii iv v iii
(2) ii iv iii v
(3) iii iv v i
(4) ii i iii v (NEET 2019)
✅ (2) ii iv iii v
05. Which of the following is a commercial blood-cholesterol lowering agent? (NEET 2019)
(1) Cyclosporin-A
(2) statin
(3) Streptokinase
(4) Lipases
✅ (2) statin
06. Conversion of milk to curd improves its nutritional value by increasing the amount of
(1) Vitamin D
(2) Vitamin A
(3) Vitamin B12
(4) Vitamin E (NEET 2018)
✅ (3) Vitamin B12
07. Which of the following is correctly matched for the product produced by them?
(1) Methanobacterium: Lactic acid
(2) Penicillium notatum: Acetic acid
(3) Saccharomyces cerevisiae: Ethanol
(4) Acetobacter aceti: Antibiotics (NEET 2017)
✅ (3) Saccharomyces cerevisiae: Ethanol
08. Select the mismatch.
(1) Rhodospirillum – Mycorrhiza
(2) Anabaena – Nitrogen fixer
(3) Rhizobium – Alfalfa
(4) Frankia – Alnus (NEET 2017)
✅ (1) Rhodospirillum – Mycorrhiza
09. Match column I with column II and select the correct option using the codes given below.
(1) A-(iii), B-(i), C-(ii), D-(iv)
(2) A-(iii), B-(i), C-(iv), D-(ii)
(3) A-(i), B-(iv), C-(ii), D-(iii)
(4) A-(iii), B-(iv), C-(i), D-(ii) (NEET-II 2016)
✅ (2) A-(iii), B-(i), C-(iv), D-(ii)
10. Which of the following is wrongly matched in the given table? (NEET-I 2016)
✅ (2) Clostridium butylicum - Lipase - Removal of oil stains
Model Questions
11. LAB
(1) Converts milk to curd
(2) Partially digest casein
(3) Increases cyanocobalamin
(4) All of these
✅ (4) All of these
12. Propionibacterium sharmaniiand Penicillium roqueforti are concerned with
(1) Cheese
(2) Clot buster
(3) Statin
(4) Sewage treatment
✅ (1) Cheese
13. Choose the correct combination.
(1) Aspergillus niger Citric acid
(2) Trichoderma polysporum Butyric acid
(3) Streptococcus Pectinase
(4) Monascus purpureus Lactic acid
✅ (1) Aspergillus niger Citric acid
14. Select the mismatching set.
(1) Penicillin, Fleming, Staphylococci
(2) Chain & Florey, Penicillin, Mould
(3) Baculovirus, IPM, Biocontrol
(4) LAB, ethanol, cheese
✅ (4) LAB, ethanol, cheese
15. Of the following, select the beverages that are not distilled.
(1) Wine & Whisky
(2) Beer & Brandy
(3) Wine & Beer
(4) Beer & Rum
✅ (3) Wine & Beer
16. Saccharomyces cerevisiae is also known as
(1) Methanogen
(2) Baker’s yeast
(3) Brewer’s yeast
(4) Both B & C
✅ (4) Both B & C
17. 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
Of these,
(1) i & iii are correct
(2) ii & iii are correct
(3) i & iv are correct
(4) iii & iv are correct
✅ (2) ii & iii are correct
18. Select the odd man out.
(1) Acetobacter aceti
(2) Aspergillus niger
(3) Clostridium butylicum
(4) Lactobacillus
✅ (2) Aspergillus niger
19. Which is correct statement?
(1) Lipases are used in detergents to remove all types of stains from the laundry.
(2) Cyclosporine A is used as immunosuppressive agent which increases the power of immune system.
(3) Statin is produced by yeast and used to inhibit the enzymes responsible for synthesis of cholesterol.
(4) A bacterium, Aspergillus niger, is used to produce citric acid.
✅ (3) Statin is produced by yeast and used to inhibit the enzymes responsible for synthesis of cholesterol.
20. Cyclosporine A is
(1) Clot buster
(2) Immunosuppressive agent
(3) Stain remover
(4) Blood cholesterol lowering agent
✅ (2) Immunosuppressive agent
Which of the following is known as ‘clot buster’?
(1) Streptokinase
(2) Protease
(3) Pectinase
(4) Lipase
✅ (1) Streptokinase
Topic 2: MICROBES IN SEWAGE TREATMENT & BIOGAS PRODUCTION
NEET: Previous Years Questions
22. Which of the following is put into Anaerobic sludge digester for further sewage treatment?
(1) Effluents of primary treatment
(2) Activated sludge
(3) Primary sludge
(4) Floating debris (NEET 2020)
✅ (2) Activated sludge
23. Which of the following in sewage treatment removes suspended solids?
(1) Secondary treatment
(2) Primary treatment
(3) Sludge treatment
(4) Tertiary treatment (NEET 2017)
✅ (2) Primary treatment
Model Questions
24. Choose the correct sequence of steps of sewage treatment in STP.
(1) Filtration & sedimentation → settling tank → aeration tank → sludge digester
(2) Filtration & sedimentation → aeration tank → settling tank → sludge digester
(3) Aeration tank → Filtration & sedimentation → sludge digester → settling tank
(4) Settling tank → sludge digester → aeration tank → Filtration & sedimentation
✅ (2) Filtration & sedimentation → aeration tank → settling tank → sludge digester
25. In sewage treatment flocs means
(1) Masses of bacteria and fungal filaments
(2) Anaerobic bacteria in sludge digester
(3) The effluent formed after primary treatment
(4) A part of activated sludge
✅ (1) Masses of bacteria and fungal filaments
26. BOD means
(1) Biological oxygen demand
(2) Biochemical oxygen demand
(3) Biological oxygen deficiency
(4) Both A & B
✅ (4) Both A & B
27. During sewage treatment, biogas is produced in
(1) Aeration tank
(2) Anaerobic sludge digesters
(3) Settling tank
(4) No biogas production
✅ (2) Anaerobic sludge digesters
28. IARI & KVIC are related with
(1) IPM program
(2) Sewage treatment
(3) Biogas plant
(4) Biofertilizers
✅ (3) Biogas plant
29. Methanobacterium is related to
(1) Biogas
(2) Cellulose digestion
(3) Rumen of cattle
(4) All of these
✅ (4) All of these
Topic 3: MICROBES AS BIOCONTROL AGENTS & BIOFERTILIZERS
NEET: Previous Years Questions
30. Which of the following can be used as a biocontrol agent in the treatment of plant disease?
(1) Trichoderma
(2) Chlorella
(3) Anabaena
(4) Lactobacillus (NEET 2019)
✅ (1) Trichoderma
31. Select the correct group of biocontrol agents.
(1) Bacillus thuringiensis, Tobacco mosaic virus, Aphids
(2) Trichoderma, Baculovirus, Bacillus thuringiensis
(3) Oscillatoria, Rhizobium, Trichoderma
(4) Nostoc, Azospirillium, Nucleopolyhedrovirus (NEET 2019)
✅ (2) Trichoderma, Baculovirus, Bacillus thuringiensis
Model Questions
32. Choose the wrong combination.
(1) Azospirillum - Nitrogen fixation
(2) Cyanobacteria - Nostoc
(3) Trichoderma - Biofertilisers
(4) Methanobacterium - Rumen
✅ (3) Trichoderma - Biofertilisers
33. Odd man out.
(1) Rhizobium
(2) Mycorrhiza
(3) Cyanobacterium
(4) Bacillus thuringiensis
✅ (4) Bacillus thuringiensis
34. 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.
(1) ii & iii are correct
(2) i & iv are correct
(3) i & ii are correct
(4) iii & iv are correct
✅ (2) i & iv are correct
35. Which of the following is microbial biocontrol agent?
(1) Trichoderma
(2) Anabaena
(3) Nostoc
(4) Glomus
✅ (1) Trichoderma
36. Bacillus thuringiensis helps to control
(1) Viral infection
(2) Aphids
(3) Butterfly caterpillar
(4) Grubs
✅ (3) Butterfly caterpillar
37. An important biofertiliser found in paddy fields is
(1) Blue green algae
(2) Mycorrhiza
(3) Nucleopolyhedrovirus
(4) All
✅ (1) Blue green algae