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12th Biology chapter 10 Bihar board with NCERT-Details & Highlights
| name of content | 12th Biology chapter 10 full solution |
| content | Biology objective type MCQ question with answer |
| name of subjects | class 12 Biology |
| important for exam | Bihar board & other state board |
| pattern & Level | NCERT & State level question |
12th Biology chapter 10 all objective solutions – download PDF
1. Vayogas consists of
-
- (A) COM
- ( B ) H , S
- ( C ) ONLY
- (D) all of them
Answer: (C) CH
2. Which of the following is Chlorella?
-
- (A) Bacteria
- (B) Algae
- (C) Protozoa
- (D) Single cell protein
Answer: (B) Algae
3. By whom do cyanobacteria help the farmers?
-
- (A) reducing the alkalinity of the soil
- (B) reducing the acidity of the soil
- (C) neutralizing the basicity of the soil
- (D) by water logging
Answer: (B) By reducing the acidity of the soil
4. Which of the following is a single cell protein?
-
- (A) Spirulina
- (B) Chlorella
- (C) Synadesmus
- (D) all of the above
Answer: (D) All of the above
5. Which micro-organism is used in the wine industry
-
- (A) Yeast
- (B) Lacto Bacillus
- (C) amoeba
- (D) PMV
Answer: (A) Yeast
6. Which bacteria is used to make curd from milk?
-
- (A) Clostridium
- (B) Lactobacillus
- (C) Mycococcus
- (D) Streptococcus
Answer: (B) Lactobacillus
7. Helps in making the soil fertile
-
- (A) Pesticides
- (B) organic manure
- (C) yeast
- (D) all of them
Answer: (B) Organic manure
8. In the root body of which non-legume plants organic manure is present?
-
- (A) did
- (B) Claustudium
- (C) Azoto bacteria
- (D) none of these
Answer: (D) none of these
9. Idli and Dosa flour is prepared using which microorganism?
-
- (A) Bacteria
- (B) Lactoveacillus
- (C) Virus
- (D) yeast
Answer: (D) Yeast
10. Which of the following is a toxin protein secreted by Vasillus thuringiensis?
-
- (A) tubulin
- (B) Insulin
- (C) Cry protein
- (D) all of these
Answer: (C) Cry protein
Bihar Board most mcq solution 12th biology chapter 10
11. What is ‘Probiotics’?
-
- (A) a new type of food allergen
- (B) Safe antibiotics
- (C) Living Microorganisms Food Supplement Microorganisms
- (D) cancer inducers
Answer: (C) Living Microorganisms Food Supplement Microorganisms
12. A Plamid
-
- (A) can become like himself
- (B) lipase is related to
- (C) is related to chromosome
- (D) none of these
Answer: (A) He can become like himself
13. Presence of Mycorrhiza
-
- (A) Increases the absorption capacity of plant roots
- (B) makes plants disease resistant
- (C) Both ‘ A ‘ and ‘ B ‘
- (D) none of these
Answer: (C) Both ‘A’ and ‘B’
14. Terramycin is obtained
-
- (A) By streptomyces
- (B) Streptomyces by Benzwele
- (C) Streptomyces by Oriopusian
- (D) Streptomyces by Remosus
Ans: (D) Streptomyces by Remosus
15. By which process various alcoholic drinks are made?
-
- (A) filtering
- (B) filtration
- (C) by fermentation
- (D) by flotation
Answer: (C) Fermentation
16. Which microorganism is used in vinegar industry?
-
- (A) of Clostridium
- (B) of acetobacter
- (C) of Trichoderma
- (D) Streptococcus
Answer: (B) of acetobacter
17. What gives the special kind of aroma in paneer?
-
- (A) yeast
- (B) fungus
- (C) bacteria
- (D) virus
Answer: (C) Bacteria
18. is antibiotic
-
- (A) Drugs
- (B) Toxin
- (C) Plants
- (D) syrup
Answer: (A) Medicines
19. The symbiotic relationship formed between the roots and fungi of plants of higher family is called
-
- (A) Biodiversity
- (B) Lichen
- (C) nodules
- (D) Mycorrhiza
Answer: (D) Mycorrhiza
20. The enzyme used as clotting agent is
-
- (A) lipase
- (B) amylase
- (C) Streptokinase
- (D) proteases
Answer: (C) Streptokinase
21. Penicillin is obtained from?
-
- (A) Aspergillus pumigatus
- (B) Penicillium notarum
- (C) Penicillium graciflobum
- (D) Streptomyces gracious
Answer: (B) Penicillium Notarum
BSEB 12th biology chapter 10 most objective solution
22. Sugar is used continuously in ‘fund-batch’ fermentation
-
- (A) to obtain antibiotics
- (B) to purify enzymes
- (C) for dissolution of sewage
- (D) to produce methane
Answer: (B) To purify enzymes
23. The organism used as biofertilizer for the growth of soybean crop is
-
- (A) Azospirillum
- (B) Rhizobium
- (C) Nostock
- (D) Azotobacter
Answer: (B) Rhizobium
24. Bt cotton is ufattet
-
- (A) insect
- (B) weed
- (C) salt
- (D) dry
Answer: (A) Insect
25. Which one of the following relations is wrong?
-
- (A) Streptomycin – Antibiotics
- (B) Coliform – Vinegar
- (C) Methane gas – Gobar gas
- (D) Yeast – Ethanol
Ans: (B) Coliform – Vinegar
26. Bt feug
-
- (A) intracellular lipids
- (B) intracellular crystalline protein
- (C) Extracellular crystalline proteins
- (D) Lipids
Answer: (C) Extracellular crystalline proteins
27. The first microbial insecticide is
-
- (A) Bacillus polymyxa
- (B) Bacillus questionitis
- (C) Bacillus thuringiensis
- (D) Bacillus Brevis
Answer: (C) Bacillus thuringiensis
28. Penicillin reduces bacterial multiplication because it
-
- (A) inhibits RNA synthesis
- (B) inhibits DNA synthesis
- (C) destroys chromatin
- (D) reduces cell wall formation
Answer: (A) Inhibits RNA synthesis
29. The yeast used in baking is
-
- (A) Saccharomyces cerevisiae
- (B) Saccharomycin octospores
- (C) Saccharomyces Cucoris
- (D) Rhizosaccharomyces
Answer: (A) Saccharomyces cerevisiae
30. Penicillin antibiotic is produced by
-
- (A) bacteria
- (B) fungus
- (C) algae
- (D) virus
Answer: (B) Fungus
31. Streptococcus is used in the preparation of
-
- (A) Wine
- (B) Idli
- (C) Cheese
- (D) none of these
Answer: (C) Paneer
32. Nifta ORTIGT
-
- (A) Penicillium
- (B) Rhizobium
- (C) Aspergillus
- (D) Streptococcus
Answer: (B) Rhizobium
12th biology chapter 10 mcq solution bihar board
33. Alcoholic fermentation takes place
-
- (A) By Chlorella
- (B) By yeast
- (C) By Agoricus
- (D) by Azotobacter
Answer: (B) By yeast
34. Which of the following is a symbiotic nitrogen fixation?
-
- (A) Azotobacter
- (B) Azolla
- (C) Glooms
- (D) process
Answer: (D) Process
35. Viruses used in biological control are called
-
- (A) Baculovirus
- (B) Oncovirus
- (C) Retrovirus
- (D) Paramyxovirus
Answer: (A) Baculovirus
36. Azolla has a symbiotic relationship with
-
- (A) Chlorella
- (B) Anabina
- (C) Nostoke
- (D) Tolyponics
Answer: (B) Anabina
37. The term antibiotic was used for the first time.
-
- (A) Fleming
- (B) Pasteur
- (C) Waxman
- (D) Lister
Answer: (C) Waxman
38. Free living anaerobic nitrogen fixing bacteria are
-
- (A) Rhizobium
- (B) Streptococcus
- (C) Azotobacter
- (D) Clostridium
Answer: (D) Clostridium
39. Which activities are used in the primary treatment of sewage sludge?
-
- (A) Flotation
- (B) Filtration
- (C) Filtration
- (D) all of them
Answer: (D) All of them
40. What is mainly needed in the secondary treatment of sewage sludge?
-
- (A) yeast
- (B) Virus
- (C) Bacteria
- (D) Fungi
Answer: (C) Bacteria
41. An independent living aerobic non-photosynthetic nitrogen fixing bacterium is
-
- (A) Anabina
- (B) Clostrisim
- (C) Azotobacter
- (D) Rhizobium
Answer: (C) Azotobacter
42. The fermentation microorganism for the rating of jute is
-
- (A) Methanophilic bacteria
- (B) butyric acid bacteria
- (C) Helicobacter pylon
- (D) Streptococcus lectin
Answer: (B) Butyric acid bacteria
43. Citric acid is produced by
-
- (A) Rhizopus
- (B) Newkar
- (C) Aspergillus
- (D) Saccharomyces
Answer: (A) Rhizopus
Important most mcq solution 12th biology chapter 10
44. Nitrogenase enzyme is found in Nostoc
-
- (A) in old cells
- (B) in heterocyst
- (C) in both ‘ A ‘ and ‘ B ‘
- (D) only in hormones
Answer: (B) Heterocyst
45. is probiotic
-
- (A) Microbes that cause cancer
- (B) New type of food allergens
- (C) Living Microbial Food Nutrients
- (D) Safe antibiotics
Answer: (C) Living Microorganism Food Nutrients
46. By which process lactic acid is formed?
-
- (A) Fermentation
- (B) Glycolysis
- ( C ) HMP
- (D) none of these
Answer: (A) Fermentation
47. The best example of organic fertilizer which improves the absorption of phosphorus is
-
- (A) Actinomycetes fungus
- (B) Rhizobium
- (C) Azospirillum
- (D) none of these
Answer: (C) Azospirillum
48. Nitrogen fixation in the nodules of the roots of Allus is done by
-
- (A) Prancia
- (B) Azorhizobium
- (C) Bradyrhizobium
- (D) Clostridium
Answer: (A) Prankia
49. Which of the following antibiotics is active against fungi?
-
- (A) Streptomycin
- (B) Polynes
- (C) Tetracycline
- (D) Neomycin
Answer: (B) Paulins
50. Which of the following is widely used as a crop biocatalyst in Indian paddy fields?
-
- (A) Rhizobium
- (B) Acacia areica
- (C) Acalfa indica
- (D) Azolla pinnata
Answer: (D) Azolla Pinnetta
51. Which of the following is not used as a biopesticide?
-
- (A) Trichoderma harzianum
- (B) Nuclear polyhedrosis virus (NPV)
- (C) Xanthemonas compestris
- (D) Vesillus thuringiensis
Answer: (D) Vesicular thrombosis
52. The bioactive molecule cyclosporine A is made from
-
- (A) fungus
- (B) yeast
- (C) bacteria
- (D) virus
Answer: (A) Fungi
53. A statin helpful in reducing the level of cholesterol in human blood is prepared
-
- (A) bacteria
- (B) algae
- (C) virus
- (D) yeast
Answer: (D) Yeast
54. Which of the following is the first artificially made organic material?
-
- (A) Insulin
- (B) yeast
- (C) Thyroxine
- (D) none of these
Answer: (A) Insulin
55. Antibiotics are prepared, mainly
-
- (A) Fungi
- (B) Tanning
- (C) algae
- (D) bacteria
Answer: (D) Bacteria
56. The symbiotic relationship formed between fungi and the roots of plants of higher family is called
-
- (A) Glands
- (B) mycorrise
- (C) Lichen
- (D) Biodiversity
Answer: (B) Mycorrhiza
57. Curd and Paneer (Yort and Ghee) products are
-
- (A) fermentation
- (B) Pasteurization
- (C) of dehydration
- (D) none of these
Answer: (A) Fermentation
58. The special aroma produced by the action of bacteria on tea leaves is called
-
- (A) Tanning
- (B) Vooring
- (C) Fermentation
- (D) Ripening
Answer: (B) Vooring
59. Acid rain occurs
-
- (A) by combustion of fossil fuels
- (B) C.F.C. From
- (C) ozone
- (D) none of these
Answer: (A) Combustion of fossil fuels
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Bihar board 12th Biology chapter 10 complete objective
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Bihar board 12th science stream subjects wise solution
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| SL.N. | Subject name with solutions |
| 01 | Physics |
| 02 | Chemistry |
| 03 | Biology |
| 04 | Math |
| 05 | Hindi |
| 06 | English |