1) LAB produces acids that coagulate and partially digest milk proteins.
2) LAB improves nutritional quality by increasing vitamin B12
3) It checks the disease causing microbes in our stomach
4) It is not a probiotic
2. The raising of dough in dosa and idli is due to
A. Respiration of bacteria
B. Fermentation caused by bacteria
C. Production of CO2 gas
1) AB
2) BC
3) AC
4) ABC
3. The dough used for making bread is fermented using
1) Chaetomium cellulyticum
2) Saccharomyces cervisiae
3) Torula yeast
4) Lactic Acid Bacteria
4. Fermenting sap from palms yields
1) Sago
2) Yogurt
3) Toddy
4) All the above
5. Which of the following cannot be fermented by microbes?
1) Fish
2) Soya bean
3) Bamboo shoots
4) None of the above
6. Assertion: Swiss cheese has large holes.
Reason: Propionibacterium sharmanii produces large amount of
oxygen during fermentation.
1) Both A and R are true and R is the correct explanation for A
2) Both A and R are true But R is not the correct explanation for A
3) Only A is true, R is false
4) A is false and R is true.
7. Roquefort cheese cannot be ripened without fermented with
1) Yeast
2) Fungi
3) Bacteria
4) Any of the above
8. In which of the following is the yeast Saccharomyces cervisiae used
A. Production of beverages like wine, beer, whisky etc.
B. Bread making
C. Fermenting malted cereals and fruit juices
D. Production of ethanol
1) ABC
2) BCD
3) ACD
4) ABCD
9. Which of the following is produced without distillation?
1) Wine
2) Whisky
3) Brandy
4) Rum
10. With reference to human beings antibiotics means
1) Anti-life
2) Pro life
3) Pre life
4) Post life
11. Alexander Flemming discovered penicillin while working on
1) Pencillium notatum
2) Pencillium roqueforti
3) Staphylococci bacteria
4) Streptococcus
12. The potential of penicillin to be used as an effective antibiotic was established by
1) Alexander Flemming
2) Carl Woese
3) Ernest Chain and Howard Florey
4) Danielli and Davson
13. Citric acid is produced by which of the following micro organisms
1) Aspergillus niger
2) Acetobacter aceti
3) Clostridium butylicum
4) Lactobacillus
14. The enzymes used in detergent formulations to remove oily stains from laundry are
1) Proteases
2) Ligases
3) Pectinases
4) Lipases
15. The enzymes used to clarify fruit juices
1) Proteases and pectinases
2) Ligases and amylases
3) Hydrolases and lipases
4) Both 1 and 3
16. Clots from blood vessels of patients who have undergone myocardial infection can be removed by using
1) Pectinase
2) Pepsin
3) Streptokinin
4) Statins
17. Which of the following is true about cyclosporin A
1) It is a bioactive molecule
2) It is used as an immunosuppressive agent in organ transplant patients
3) It is produced by the fungus Trichoderma polysporum
4) All the above
18. The blood cholesterol lowering statins are produced by
1) Bacterium Acetobacter aceti
2) Yeast Monascus purpureus
3) Fungus Trichoderma polysporum
4) None of the above
19. The following debris during primary treatment of sewage is removed by
1) Sedimentation
2) Sequential filtration
3) Mechanical agitation
4) Anaerobic digestion
20. The grit (soil and small pebbles) during primary treatment of sewage is removed by
1) Sedimentation
2) Sequential filtration
3) Mechanical agitation
4) Anaerobic digestion
21. Masses of bacteria associated with fungal filaments to form mesh like structure are called
1) Flocs
2) Grit
3) Effluent
4) Sludge
22. The amount of O¬¬2 that would be consumed if all the organic matter in 1 litre of water were oxidised by bacteria is called
1) Chemical oxygen demand
2) Biochemical oxygen demand
3) Organic oxygen demand
4) Aquatic oxygen demand
23. The BOD is
1) A measure of organic matter present in water
2) A measure of the rate of uptake of oxygen by microorganisms in a sample of water
3) BOD is directly proportional to the polluting potential of waste water
4) All the above
24. Utilization of microbes to remove toxic substances such as oil or chemical spills released into the environment is called
1) Bio fortification
2) Bio control
3) Bio remediation
4) Bio magnification
25. Bio gas contains a mixture of gases predominantly
1) Butane
2) Methane
3) Hexane
4) Octane
26. Which of the following is true regarding methanogenic bacteria
A. They are found in anaerobic sludge during sewage treatment
B. They are present in rumen of cattle
C. They are present in human intestine
D. They help in breakdown of cellulose
1) ABC
2) BCD
3) ABD
4) ACD
27. The technology of Bio gas production was developed in India by
1) Indian Agricultural Research Institute
2) Khadi and Village Industries Commission
3) Indian Council of Agricultural Research
4) Both 1 and 2
28. Use of biological methods for controlling plant diseases and pests is called
1) Bio fortification
2) Bio control
3) Bio remediation
4) Bio magnification
29. In view of organic farming the best way to control pests is
1) To eradicate by using scare crow method
2) To allow them to feed on crops
3) To keep them at manageable levels by a complex system of checks and balances
4) Use chemicals with discrimination
30. Red and black marked lady bird is used to get rid of
1) Aphids
2) Mosquitoes
3) Both aphids and mosquitoes
4) Caterpillars
31. The insects which are used to get rid of mosquitoes are
1) Butterflies
2) Ladybirds
3) Dragon flies
4) Wasps
32. The microbial bio control agent that can be introduced to control butterfly caterpillars is
1) Bacillus thuringiensis
2) Trichoderma viridi
3) NPV(Nuclear Polyhedrosis Virus)
4) CPV (Cytoplasmic Polyhedrosis Virus)
33. An effective bio control agent of plant pathogens which lives in root ecosystems is
1) Trichoderma viridi
2) Bacillus thuringiensis
3) NPV(Nuclear Polyhedrosis Virus)
4) CPV (Cytoplasmic Polyhedrosis Virus)
34. The best bio control agent to attack arthropod insects is
1) Methano coccus
2) Methano bacillus
3) Trichoderma
4) Baculo virus
35. Which of the following pairs are free living nitrogen fixers
1) Mycorrhizae and Azospirillum
2) Azospirillum and Azotobacter
3) Azotobacter and Rhizobium
4) Mycorrhizae and Azotobacter
36. The Glomus fungus which is a best mycorrhizae former helps in absorption of
1) Nitrogen
2) Phosphorus
3) Potassium
4) N,P,K
37. Mycorrhizae are useful to the plant in the following ways
A. Absorption of phosphorus
B. Provide resistance to root borne pathogens
C. Provide tolerance to salinity and drought
D. Overall increase in plant growth and development
1) ABC
2) BCD
3) CDA
4) ABCD
38. Which of the following is not a nitrogen fixing cyano bacterium?
1) Anabaena
2) Nostoc
3) Oscillatoria
4) Chlorella
39. The mutated pathogens are called
1) Super microbes
2) Mycorrhizae
3) Bio pesticides
4) Any of these
40. The use of or threat to use biological agents in order to spread fear or inflict disease and death upon large populations is called
1) Proteomics
2) Genomics
3) Bio terrorism
4) Bio informatics
41. Which of the following is not a re-emerging diseases presently
1) Cholera
2) TB
3) Dengue fever
4) SARS
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