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 Creative One Mark Questions with Answer Key - Part Four
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.
Assertion (A): Ozone layer protects the UV rays entering the Earth.
Reason (R): UV rays may cause melanoma
A is right R is wrong
A is wrong R is right
Both A and Rare correct
R explains A
2.
Incomplete linkage was reported by Hutchinson in ___________
Drosophila
Maize
Neurospora
Lathyrus odoratus
3.
How many characters studied by Mendel in pisum sativum
Three
Five
Seven
Nine
4.
Identify the cryoprotectant
Dimethyl formamide
Fructose
Glycerol
Sodium alginate
5.
Assertion (A): Black pepper is a spice.
Reason (R): Condiments are flavouring substances, generally added after the cooking of food.
A is right R is wrong
R explains A
Both A and R are right. R is not correct explanation for A.
Both A and R are wrong
6.
For transformation, micro-particles coated with DNA to be bombarded with gene gun are made up of
Silver or Platinum
Platinum or Zinc
Silicon or Platinum
Gold or Tungsten
7.
Which of the following is wrongly matched in the given table?
| Microbe | Product | Application |
| Trichoderma polysporum | Cyclosporin A | Immunosuppressive drug |
| Microbe | Product | Application |
| Monascus purpureus | Statins | Lowering of blood cholesterol |
| Microbe | Product | Application |
| Streptococcus | Sterptockinase | Removal of clot from blood vessel |
| Microbe | Product | Application |
| Clostridium butylicum | Lipase | Removal of oil stains |
8.
The process by which organisms with different evolutionary history evolve similar phenotypic adaptations in response to a common environmental challenge is called
Natural selection
Convergent evolution
Non-random evolution
Adaptive radiation Human health and diseases
9.
Which of the following is not required for any of the techniques of DNA finger printing available at present?
Zinc finger analysis
Restriction enzymes
DNA-DNA hybridization
polymerase chain reaction
10.
Identify the correct option to label the diagram
1 - Archaeocytes
2 - Inner membrane
3 - Micropyle
4 - Outer membrane
5 - Monaxonspicules
1-A 2-D 3-B 4-C 5-E
1-C 2-B 3-A 4-E 5-D
1-D 2-E 3-B 4-C 5-A
1-A 2-E 3-D 4-B 5-C
1.
(d)
R explains A
2.
(b)
Maize
3.
(c)
Seven
4.
(c)
Glycerol
5.
(c)
Both A and R are right. R is not correct explanation for A.
6.
(d)
Gold or Tungsten
7.
(d)
| Microbe | Product | Application |
| Clostridium butylicum | Lipase | Removal of oil stains |
8.
(b)
Convergent evolution
9.
(a)
Zinc finger analysis
10.
(c)
1-D 2-E 3-B 4-C 5-A
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
