CBSE 2024 · Region 3 · Set 1 · Q26 · 3 marks
(a)List two major reasons for using cow-dung in a biogas plant instead of using domestic sewage.(ii)Mention one use of the unspent slurry of the biogas plant.Name the bioactive molecule and its microbial source generally used by physicians to treat the patients for :(i)Myocardial infarction(ii)High blood cholesterol level(iii)Organ transplantation
(a)
List two major reasons for using cow-dung in a biogas plant instead of using domestic sewage.
(ii)
Mention one use of the unspent slurry of the biogas plant.
Name the bioactive molecule and its microbial source generally used by physicians to treat the patients for :
(i)
Myocardial infarction
(ii)
High blood cholesterol level
(iii)
Organ transplantation
Marking-scheme solution
(i)
-Cow dung has methanogens or Methanobacterium
-Cow dung is rich in cellulosic material
-Bacteria grows anaerobically on cellulosic material to produce large amount of
methane.
(ii)
Used as manure/ fertilizer (Organic)
Bioactive molecule
Microbial source
(i)
Myocardial infarction
Streptokinase
Streptococcus
(ii)
High blood
cholesterol
level
Statins
Monoascus
purpureus
(iii)
Organ transplantation
Cyclosporin A
Trichoderma
polysporum
Microbes in Human WelfareMicrobes in Production of BiogasRemembershort_answermedium
More from Microbes in Human Welfare
- Assertion: Activated sludge contains large population of bacteria. Reason (R): These bacteria help in…2026 · asked 3×
- Assertion: Flocs are masses of bacteria associated with fungal filaments in secondary treatment of sewage.…2026 · asked 3×
- Study the figure given below and answer the questions that follow. Identify the figure and state its…2025 · asked 3×
- Study the given diagram of Sewage Treatment Plant (S.T.P.) and answer the questions that follow: S.T.P.…2022 · asked 3×
- Mention the common bacterium found in the anaerobic sludge during sewage treatment and also in the rumen of…2022 · asked 3×
- (i) Name the protozoan species that is responsible for causing the most serious and even fatal malarial…2026 · asked 3×
- A laboratory assistant collected three water samples, namely river water, untreated sewage water and…2026 · asked 3×
- What do you mean by activated sludge in an STP? Explain the biological treatment of the major part of the…2025 · asked 3×
CBSE Class 12 Biology past-paper question from the 2024board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.