Question No:1
‘It has not escaped our notice that the specific pairing we have postulated immediately suggests a possible copying mechanism for the genetic material. This was a statement of
[A] Wilkins and Franklin
[B] Hershey and Chase
[C] Avery, McLeod, McCarty
[D] Watson and Crick
Question No:2
After replication, each DNA molecule has one parental and one newly synthesized strand. This scheme is referred to as
[A] Fully conservative
[B] Mutation
[C] Crossing over
[D] Semiconservative
Question No:3
Semiconservative replication of DNA was demonstrated by
[A] Meselson and Stahl
[B] Watson and Crick
[C] Hershey and Chase
[D] Wilkins and Franklin
Question No:4
In Meselson and Stahl experiment, E. coli was grown in a medium containing
[A] 40KCL
[B] 24NaCl
[C] 15NH4Cl
[D] CsCl
Question No:5
In Meselson and Stahl experiment, 15N can only be differentiated on the basis of
[A] Radioactivity
[B] Radioactive t 1/2
[C] Physical observation
[D] Density gradient
Question No:6
Taylor and his colleagues used which plant to detect distribution of newly synthesized DNA?
[A] Pisum sativum
[B] Mirabilis jalapa
[C] Vicia faba
[D] Triticum aestivum
Question No:7
Taylor and his colleagues used which radioactive probe to detect distribution of newly synthesized DNA in chromosomes?
[A] Thymine
[B] Ademine
[C] Guanine
[D] Cytosine
Question No:8
The process of replication of DNA in E. coli requires an enzyme referred to as
[A] RNA dependent DNA polymerase
[B] RNA polymerase
[C] DNA dependent DNA polymerase
[D] DNA ligase
Question No:9
E. coli completes replication in approximately
[A] 15 min
[B] 20 min
[C] 38 min
[D] 40 min
Question No:10
Deoxyribonucleotide triphosphate serves the dual purpose of _____ and _____ in the process of replication of DNA.
[A] enzyme, substrate
[B] catalyst, substrate
[C] substrate, energy provider
[D] energy, mutage provider
Question No:11
The average rate of polymerization of deoxyribonucleotides in E. coli DNA replication process is
[A] 2500 bp/s
[B] 2000 bp/s
[C] 3000 bp/s
[D] 3500 bp/s
Question No:12
DNA dependent DNA polymerase catalyses polymerization in _____ direction only (in terms of newly synthesized strands),
[A] 5 ->3
[B] 3‘ -> 5’
[C] 5‘ -> 3’
[D] 3 -> 5
Question No:13
Discontinuously synthesized strands of DNA adjacent to _____ DNA template are joined together by _____.
[A] 5 —> 3, DNA endonucleace
[B] 3‘—> 5’, DNA ase
[C] 5‘—> 3‘, DNA ligase
[D] 5 —> 3, DNA ligase
Question No:14
During which phase of the cell cycle does replication of DNA takes place in eukaryotes?
[A] G1
[B] G0
[C] S
[D] G2
Question No:15
The process of copying genetic information from DNA to RNA is known as
[A] Translation
[B] Transduction
[C] Transcription
[D] Transformation
Molecular Basis of Inheritance Model Test-5
CategoriesNEET Biology