12th Standard Syllabus & Materials
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TN 12th Computer Applications மின்னணு தரவு பரிமாற்றம் Sample Question Papers Study Material - QB365 Set A
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TN 12th Computer Applications மின் - வணிக பாதுகாப்பு அமைப்புகள் Sample Question Papers Study Material - QB365 Set A
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TN 12th Computer Applications மின்னணு செலுத்தல் முறைகள் Sample Question Papers Study Material - QB365 Set A
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TN 12th Computer Applications மின் - வணிகம் Sample Question Papers Study Material - QB365 Set A
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TN 12th Computer Applications திறந்த மூல கருத்துருக்கள் Sample Question Papers Study Material - QB365 Set A
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Published on: 05/11/2020
12th Standard Zoology - Microbes in Human Welfare English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021
Download Tamil Nadu 12th Standard Biology question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Biology Test1.
Identify the name and the formula of industrial alcohol
Butanol, C4H9OH
Propanol, C3H7OH
Ethanol, C2H5OH
Methanol, CH3OH
2.
The leavering of the dough during fermentation is due to __________________
Formation of ethyl alchohol
Formation of CO2
Formation of oxygen
Action of zymase enzyme
3.
Which of the following are likely to be present in deep-sea water?
Archaebacteria
Eubacteria
Blue-green algae
Saprophytic fungi
4.
Rhizopus oryzae can produce_________
Fumaric acid
Malic acid
Acetic acid
Citric acid
5.
Biofertilizers are not involved in this process
increase water holding capacity of soil
Help to degrade pollutants
Provide nutrients
Improve soil texture
6.
__________is free living bacteria which acts as a biofertilizer.
Azospirillum
Nostoc
Oscillatoria
Glomus
7.
Aspergillus niger helps to produce________
Citric acid
Acetic acid
Turmeric acid
Lactic acid
8.
WorId Biofuel day is observed on_______
10th September
22nd April
10th August
17th October
9.
CO2 is not released during
Alcoholic fermentation
Lactate fermentation
Aerobic respiration in animals
Aerobic respiration in plants
10.
Which of the following pair is correctly matched for the product produced by them?
Acetobacter aceti - Antibiotics
Methanobacterium - Lactic acid
Penicilium notatum - Acetic acid
Saccharomyces cerevisiae - Ethanol
1.
(c)
Ethanol, C2H5OH
2.
(b)
Formation of CO2
3.
(a)
Archaebacteria
4.
(a)
Fumaric acid
5.
(b)
Help to degrade pollutants
6.
(a)
Azospirillum
7.
(d)
Lactic acid
8.
(c)
10th August
9.
(b)
Lactate fermentation
10.
(d)
Saccharomyces cerevisiae - Ethanol
12th Standard Syllabus & Materials
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TN 12th Computer Applications களப்பெயர் முறைமை (DNS) Sample Question Papers Study Material - QB365 Set A
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Tamilnadu Stateboard 12th Standard Subjects
Maths
Chemistry
Physics
Biology
Computer Science
Business Maths and Statistics
Economics
Commerce
Accountancy
History
Computer Applications
Biology
Computer Technology
Computer Applications
Computer Science
Business Maths and Statistics
Commerce
Economics
Maths
Chemistry
Physics
Computer Technology
History
Accountancy
Tamil
English
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