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Ch. 4 MCQ Test 3
This test is based on Ch. 4 Molecular Basis of Inheritance.
Visit my Blog
https://anandsbiology.blogspot.com/
where I have shared Power point presentations on first five points of Ch. 4. All the Best.
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1. At the end of the ........................., two daughter DNA molecules are formed.
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1 point
A Transcription
B Translation
C Replication
D Reproduction
2. ........................................ in 1958 performed an experiment to prove semiconservative nature (mode) of replication.
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1 point
A Hershey and Chase
B Avery, McLeod and McCarty
C Griffith
D Meselson and Stahl
3. Meselson and Stahl cultured bacteria E.coli in the medium containing 14N (light nitrogen) and obtained equilibrium density gradient band by using ........................
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1 point
A 1M CsCl
B 3M CsCl
C 5M CsCl
D 6M CsCl
4. Meselson and Stahl in 1958 performed an experiment to prove semiconservative nature (mode) of replication. They cultured E. coli cells in a medium containing light nitrogen and then transferred them in a medium containing ................
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1 point
A heavy isotope of hydrogen
B radioactive isotope of sulphur
C heavy isotope of Nitrogen
D heavy isotope of oxygen
5. The density gradient value of 6M CsCl and 15N DNA is almost same.
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A 6M CsCl and 14N
B 6M CsCl and 15N
C 6M CsCl and 32P
D 6M CsCl and 35S
6. They serve as – structural components, enzymes and hormones.
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A Carbohydrates
B Fats
C Nucleic acids
D Proteins
7. The process of copying of genetic information from one (template) strand of DNA into a single stranded RNA transcript, is termed as .............................
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A Translation
B Transformation
C Transcription
D Transfection
8. Central dogma of Protein synthesis was postulated by ............................. in 1958.
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A James Watson
B Dr. Har Gobind Khorana
C F.H.C. Crick
D Dr. Anand Sarabhai
9. In the process of ..................................enzyme RNA dependent DNA polymerase, synthesizes DNA from RNA.
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1 point
A Replication
B Transcription
C Translation
D Reverse Transcription
10. The present concept of central dogma in ............................. is given by Temin (1970) and Baltimore (1970).
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1 point
A adenoviruses
B poxviruses
C retroviruses
D papillomaviruses
11. Enzyme ................................. catalyses the formation of RNA transcript.
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A DNA dependent RNA Polymerase
B RNA dependent DNA Polymerase
C DNA helicase
D DNA gyrase
12. Transcription occurs in the nucleus during ...................... of cell cycle.
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1 point
A M Phase and S Phase
B G1 Phase and M Phase
C G1 and G2 Phase
D G1 and S Phase
13. The promoter is located towards ..................... end of ..................... i.e. upstream.
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1 point
A 3' ; template strand
B 5' ; coding strand
C 3' ; coding strand
D 5' ; template strand
14. It is a DNA sequence that provides binding site for enzyme RNA polymerase.
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A The Promoter
B The Structural gene
C The Coding sequence
D The Terminator
15. During transcription .............................. binds to specific Promotor.
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A DNA polymerase
B RNA polymerase
C DNA ligase
D DNA helicase
16. In prokaryotes, the enzyme recognizes the promotor by its ........................... sub unit.
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A alpha factor
B beta factor
C sigma factor
D rhoe factor
17. DNA dependent ....................... catalyses polymerisation in 5’→3’ direction.
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A DNA ligase
B DNA polymerase
C DNA gyrase
D RNA polymerase
18. In protein synthesis, DNA strand having .................polarity acts as ...............................
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A 3'--> 5' ; coding strand
B 3' --> 5' ; sense strand
C 5' --> 3' ; sense strand
D 3' --> 5' ; template strand
19. The information on this strand of DNA is copied on mRNA. a) template strand b) antisense strand c) coding strand d) sense strand
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1 point
A All a,, b, c, d are correct
B Only a and b are correct
C Only c and d are correct
D All are incorrect
20. It is located at 3’ end of coding strand
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1 point
A The promoter
B The structural gene
C The terminator
D The coding sequence
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