12th Biology chapter 10: full solution, notes, MCQ, & free PDF | Bihar board

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12th Biology chapter 10: cover all important question with new latest pattern. you can download Biology chapter 10 notes & full solution as PDF format in English. below we are goin to cover chapter 10 Biology class 12 Bihar board
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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

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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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