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Published on: 05/11/2020
12th Standard Zoology - Molecular Genetics English Medium Free Online Test One Mark Questions with Answer Key 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.
Whose experiment finally provided convincing evidence that DNA is the genetic material?
Griffith experiment
Avery, Macleod and McCarty's experiment
Hershey-Chase experiment
Urey-Miller's experiment
2.
Select the two statements out of the four (I -IV) given below about lac operon,
i. Glucose or galactose may bind with the repressor and inactive it.
ii. In the absence of lactose, the repressor binds with the operator region
iii. The z-gene codes for permease.
iv. This was elucidated by Francois Jacob and Jacques Monod.
The correct statements are
i and ii
ii and iii
ii and iv
i and ii
3.
Human genome is approximately said to have __________ base
3 x 108 bp
3.4 x 109 bp
3.2 X 107 bp
3x 109bp
4.
The term ___________ refers to DNA of Prokaryotes.
Nuclein
Ribozyme
Genophore
Nucleosome
5.
___________ used radioactive labelled molecules to prove that DNA is the genetic material.
Hershey and Chase
Wilkins and Franklin
Griffith
Mcleod and Avery
6.
The term nucleic acid was coined by ________.
Miescher
Hofmeister
Altman
Mcleod
7.
One gene one enzyme hypothesis was proposed by Beadle and Tatum based on ________
Yeast
Drosophila
E. coli
Neurospora
8.
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.
(c)
Hershey-Chase experiment
2.
(c)
ii and iv
3.
(d)
3x 109bp
4.
(c)
Genophore
5.
(a)
Hershey and Chase
6.
(c)
Altman
7.
(d)
Neurospora
8.
(d)
9.
(d)
Replication, Transcription, Translation
10.
(b)
DNA is the genetic material
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
Tamilnadu Stateboard Standards
