12th Standard Syllabus & Materials
12th Standard
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
NEW12th Standard
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 - Molecular Genetics English Medium Free Online Test One Mark Questions 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.
DNA finger printing technique was developed by
Frederick Sanger
Alex Jeffrey
Hershey
Rosalind Franklin
2.
Replication errors are corrected by repair enzymes such a ______.
Polymerases
Kornberg enzyme
helicases
Nucleases
3.
The concept of RNA world was independently proposed by __________
Orgel, Brick and Carl woese
Brick, Griffith and Crick
Wilkins and Franklin
Walter Gilbert
4.
___________ used radioactive labelled molecules to prove that DNA is the genetic material.
Hershey and Chase
Wilkins and Franklin
Griffith
Mcleod and Avery
5.
One gene one enzyme hypothesis was proposed by Beadle and Tatum based on ________
Yeast
Drosophila
E. coli
Neurospora
6.
The term gene was coined by ________
Mendel
Lyon
Johannsen
Hershey
7.
When lactose is present in the culture medium:
Transcription of lac y, lac z, lac a genes occurs.
Repressor is unable to bind to the operator.
Repressor is able to bind to the operator.
Both (a) and (b) are correct.
8.
Which of the following statements is not true about DNA replication in eukaryotes?
Replication begins at a single origin of replication.
Replication is bidirectional from the origins.
Replication occurs at about 1 million base pairs per minute
There are numerous different bacterial chromosomes, with replication occuring in each at the same time.
9.
Which of the following is the correct sequence of event with reference to the central dogma?
Transcription, Translation, Replication
Transcription, Replication, Translation
Duplication, Translation, Transcription
Replication, Transcription, Translation
10.
Hershey and Chase experiment with bacteriophage showed that ______.
Protein gets into the bacterial cells
DNA is the genetic material
DNA contains radioactive sulphur
Viruses undergo transformation
1.
(b)
Alex Jeffrey
2.
(d)
Nucleases
3.
(a)
Orgel, Brick and Carl woese
4.
(a)
Hershey and Chase
5.
(d)
Neurospora
6.
(c)
Johannsen
7.
(d)
Both (a) and (b) are correct.
8.
(d)
There are numerous different bacterial chromosomes, with replication occuring in each at the same time.
9.
(d)
Replication, Transcription, Translation
10.
(b)
DNA is the genetic material
12th Standard Syllabus & Materials
12th Standard
TN 12th Computer Applications களப்பெயர் முறைமை (DNS) Sample Question Papers Study Material - QB365 Set A
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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
