12th Standard Syllabus & Materials
12th Standard
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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: 21/06/2021
QB365 provides detailed and simple solution for every Creative Questions in class 12 Biology Subject. It will helps to get more idea about question pattern in every Creative questions with solution.
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.
How insect resistant plants are developed using Bacillus thuringiensis?
2.
Ethanol is a industrial alcohol - Justify
3.
What are crygenes?
4.
How are antibiotics classified?
5.
What are prebiotics?
1.
Bacillus thuringiensis is a soil dwelling bacterium which is commonly used as a biopesticide and contains a toxin called cry toxin. Scientists have introduced this toxin producing genes into cotton and have raised genetically engineered insect resistant cotton plants.
2.
Saccharomyces cerevisiae is the major producer of ethanol (C2H5OH). It is used for industrial, laboratory and fuel purposes. So ethanol is referred to as industrial alcohol.
3.
They are genes present in the bacterium Bacillus thuringiensis and code for crystal proteins called Delta-endotoxin which are toxic to certain Insect pests. The Bacteria is used to produce genetically engineered insect resistant plants.
4.
Antibiotics are classified as:
Broad-spectrum antibiotics: They act against a wide range of disease-causing bacteria.
Eg.streptomycin
Narrow-spectrum antibiotics They are active against a selected group of bacterial types
5.
Prebiotics are compounds in food (fibers) that induce the growth or activity of beneficial microorganisms.
12th Standard Syllabus & Materials
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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
French
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