12th Standard Syllabus & Materials
12th Standard
TN 12th Computer Applications மின்னணு தரவு பரிமாற்றம் Sample Question Papers Study Material - QB365 Set A
NEW12th Standard
TN 12th Computer Applications மின் - வணிக பாதுகாப்பு அமைப்புகள் Sample Question Papers Study Material - QB365 Set A
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
NEW12th Standard
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 Book Back 1 Mark Questions with Answer Key - Part Three
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.
Which is not a macrophage?
Monocyte
Microglia
Kupffer cell
Lymphocyte
2.
3.
A wheat variety, Atlas 66 which has been used as a donor for improving cultivated wheat, which is rich in ______.
iron
carbohydrates
proteins
vitamins
4.
Deforestation means ______.
growing plants and trees in an area where there is no forest
growing plants and trees in an area where the forest is removed
growing plants and trees in a pond
Removal of plants and trees
5.
Which one is in descending order of a food chain?
Producers \(\rightarrow \) Secondary consumers \(\rightarrow \) Primary consumers \(\rightarrow \) Tertiary consumers
Tertiary consumers \(\rightarrow \) Primary consumers \(\rightarrow \)Secondary consumers \(\rightarrow \) Producers
Tertiary consumers \(\rightarrow \) Secondary consumers \(\rightarrow \) Primary consumers \(\rightarrow \) Producers
Tertiary consumers \(\rightarrow \) Producers \(\rightarrow \) Primary consumers \(\rightarrow \) Secondary consumers
6.
7.
The prevention of large scale loss of biological integrity ____.
Biopatent
Bioethics
Biosafety
Biofuel
8.
Assertion (A): Agrobacterium tumefaciens is popular in genetic engineering because this bacterium is associated with the root nodules of all cereals and pulse crops
Reason(R): A gene incorporated in the bacterial chromosomal genome gets automatically transferred to the cross with which bacterium is associated.
Both assertion and reason are true. But reason is correct explanation of assertion.
Both assertion and reason are true. But reason is not correct explanation of assertion.
Assertion is true, but reason is false.
Assertion is false, but reason is true
Both assertion and reason are false.
9.
Mammalian egg is ______.
Mesolecithal and non cleidoic
Microlecithal and non cleidoic
Alecithal and non cleidoic
Alecithal and cleidoic
10.
Assertion(A): Ovulation is the release of ovum from the Graafian follicle.
Reason(R): It occurs during the follicular phase of the menstrual cycle.
Codes:
(a) A and R are true, R is the correct explanation of A
(b) A and R are true, R is not the correct explanation of A
(c) A is true, R is false
(d) Both A and R are false
A and R are true, R is the correct explanation of A
A and R are true, R is not the correct explanation of A
A is true, R is false
Both A and R are false
1.
(b)
Microglia
2.
(c)
3.
(c)
proteins
4.
(d)
Removal of plants and trees
5.
(c)
Tertiary consumers \(\rightarrow \) Secondary consumers \(\rightarrow \) Primary consumers \(\rightarrow \) Producers
6.
(d)
7.
(c)
Biosafety
8.
(a)
Both assertion and reason are true. But reason is correct explanation of assertion.
9.
(c)
Alecithal and non cleidoic
10.
(c) A is true, R is false
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
NEW12th Standard
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