12th Standard Syllabus & Materials
12th Standard
TN 12th Computer Applications மின்னணு தரவு பரிமாற்றம் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
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NEW12th Standard
TN 12th Computer Applications மின்னணு செலுத்தல் முறைகள் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications மின் - வணிகம் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications திறந்த மூல கருத்துருக்கள் Sample Question Papers Study Material - QB365 Set A
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TN 12th Computer Applications வலையமைப்பு வடமிடல் Sample Question Papers Study Material - QB365 Set A
Published on: 05/11/2020
12th Standard Biology English Medium Free Online Test Creative 1 Mark Questions - Part Two
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 incorrect statement.
(i) EcoSan toilets is a sustainable way for handling human excreta by using dry composting toilets
(ii) It reduces waste water generation
(iii) It is based on recovery and recycling of nutrients from excreta
(iv) EcoSan toilets are used in several parts of India and Srilanka.
i and ii only
iii and iv only
all the above
none of the above
2.
Statement 1: ADA deficiency was the first disease treated by gene therapy.
Statement 2: ADA is an autosomal recessive metabolic disorder
Statement 1 is true. Statement 2 is false
Statement 1 is false. Statement 2 is true
Both statements 1 and 2 are true
Both statements 1 and 2 are false
3.
Recombination frequency (RF) is equal to
\(\frac { No.ofoffsprings }{ No.ofrecombinants } \times 100\)
\(\frac { No.of\ recombinants }{ No.ofparentalstrains } \times 100\)
\(\frac { No.ofrecombinants }{ No.ofoffsprings } \times 100\)
\(\frac { No.ofoffsprings }{ No.ofparentalstrains } \times 100\)
4.
How many genetically different gametes are produced by a plant have genotype TtYyRr?
2
4
6
8
5.
Assertion (A): Zea mays is a monocotyledonous plant.
Reason (R): Shield shaped cotyledon is called scutellum.
A is correct R is incorrect.
R explains A.
Both A and R are incorrect.
Both A and R are correct. R does not explain A.
6.
Assertion (A): Social forestry refers to management of forests and afforestation on barren lands.
Reason (R): Afforestation involves the cutting of trees.
A is correct R is incorrect.
A is incorrect R is correct.
R explains A.
Both A and R are incorrect.
7.
Match the common names of the given plant species with their respective binomial
| (A) | Paddy | (I) | Vigna radiata |
| (B) | Lady's finger | (II) | Titicum aestivum |
| (C) | Wheat | (III) | Oryza sativa |
| (D) | Green gram | (IV) | Abelmoschus esculentus |
A-iii, B-iv, C-ii and D-i
A-ii, B-iii, C-i and D-iv
A - i, B - iii, C - iv and D - ii
A - i, B - ii, C - iv and D - iii
8.
DB is a standard abbreviation used for the quantitative expression of
The density of bacteria in a medium
A particular pollutant
The dominant bacillus in a culture
A certain pesticide
9.
In the geom line gene therapy, the genes are introduced into the______
bone marrow cells
blood cells
sperms and eggs
skin cells
1.
(d)
none of the above
2.
(c)
Both statements 1 and 2 are true
3.
(c)
\(\frac { No.ofrecombinants }{ No.ofoffsprings } \times 100\)
4.
(d)
8
5.
(b)
R explains A.
6.
(a) A is correct R is incorrect.
7.
(a)
A-iii, B-iv, C-ii and D-i
8.
(b)
A particular pollutant
9.
(c)
sperms and eggs
12th Standard Syllabus & Materials
12th Standard
TN 12th Computer Applications களப்பெயர் முறைமை (DNS) Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications வலையமைப்பு எடுத்துக்காட்டுகள் மற்றும் நெறிமுறைகள் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications கணினி வலையமைப்பு ஓர் அறிமுகம் Sample Question Papers Study Material - QB365 Set A
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TN 12th Computer Applications PHP-உடன் MySQL-ஐ இணைத்தல் Sample Question Papers Study Material - QB365 Set A
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
Tamilnadu Stateboard Standards
