Q301
Allen
10. NCERT BASED QUESTIONS
MCQ
How much duration of time required for replication of 4.6 x 10⁶ bp in E. coli?
A.
83 minutes
B.
18 minutes
C.
2 minutes
D.
3hrs
Q302
Allen
10. NCERT BASED QUESTIONS
MCQ
During replication large amount of energy get exhausted. The source of this energy is
A.
Deoxyribonucleotide triphosphate
B.
Deoxyribonucleoside monophosphate
C.
Deoxyribonucleoside triphosphate
D.
Both (1) and (2)
Q303
Allen
10. NCERT BASED QUESTIONS
MCQ
Regarding to direction of DNA replication select out the correct one :-
A.
5' → 3' Template – continuous synthesis
B.
3' → 5' Template - discontinuous synthesis
C.
3' → 5' Template – continuous synthesis
D.
5' → 3' Template – synthesis of leading strand
Q304
Allen
10. NCERT BASED QUESTIONS
MCQ
Which of the following diagram of replication fork is correct?
A.
B.
C.
D.
Q305
Allen
10. NCERT BASED QUESTIONS
MCQ
Which of the following feature of RNA make it labile and easily degradable?
A.
Single stranded nature
B.
2'-OH group on ribose sugar
C.
Phosphodiester bond
D.
Absence of Hydrogen bond
Q306
Allen
10. NCERT BASED QUESTIONS
MCQ
Regarding to RNA which of the following feature is wrong?
A.
Catalytic property
B.
Labile and easily degradable
C.
Absence of thymine
D.
Presence of methylated uracil
Q307
Allen
10. NCERT BASED QUESTIONS
MCQ
Which of the following reason is suitable to explain that RNA is best for expression of characters?
A.
It shows catalytic properties
B.
Presence of 2'-OH group on ribose sugar
C.
It can directly code for the synthesis of protein
D.
Presence of uracil
Q308
Allen
10. NCERT BASED QUESTIONS
MCQ
An adapter molecule that would on one hand read the code and on the other hand would bind to specific amino acids is:-
A.
mRNA
B.
rRNA
C.
tRNA
D.
hnRNA
Q309
Allen
10. NCERT BASED QUESTIONS
MCQ
Which of the following r-RNA show structural as well as catalytic role in bacteria
A.
16S rRNA
B.
23S rRNA
C.
5S rRNA
D.
28S rRNA
Q310
Allen
10. NCERT BASED QUESTIONS
MCQ
The unequivocal proof that DNA is the genetic material came from the experiments of :-
A.
Griffith
B.
Avery, Macleod & McCarty
C.
Hershey and Chase
D.
Watson and Crick
Q311
Allen
10. NCERT BASED QUESTIONS
MCQ
Radioactive (3⁵5S) was detected in:-
A.
Supernatant
B.
Sediment
C.
Both
D.
Either (1) or (2)
Q312
Allen
10. NCERT BASED QUESTIONS
MCQ
Which of the following is not a criteria for determination of genetic material?
A.
Ability of replication
B.
Chemically and structurally stable
C.
It should be non-mutable
D.
Ability to express itself in the form of Mendelian characters
Q313
Allen
10. NCERT BASED QUESTIONS
MCQ
Which of the following is responsible for short life span and fast rate of mutation and evolution?
A.
Presence of DNA
B.
Presence of highly reactive RNA
C.
Double stranded genetic material
D.
Single stranded genetic material
Q314
Allen
10. NCERT BASED QUESTIONS
MCQ
A transcription unit in DNA is defined primarily by three regions in DNA. These regions are:-
A.
Promoter, regulator and structural gene
B.
Promoter, structural gene and terminator
C.
Promoter, regulator and terminator
D.
Promoter, regulator and operator gene
Q315
Allen
10. NCERT BASED QUESTIONS
MCQ
In transcription unit promoter and terminator are determined on the basis of :-
A.
Coding strand
B.
Template strand
C.
Non-coding strand
D.
Antisense strand
Q316
Allen
10. NCERT BASED QUESTIONS
MCQ
In eukaryotes those DNA sequences that appear in mature or processed RNA are known as :-
A.
Introns
B.
Exons
C.
Recons
D.
Mutons
Q317
Allen
10. NCERT BASED QUESTIONS
MCQ
Which of the following exclusive property of transcription found in RNA-polymerase?
A.
Initiation
B.
Elongation
C.
Termination
D.
Processing
Q318
Allen
10. NCERT BASED QUESTIONS
MCQ
What is the length and constituent base of tail in functional m-RNA?
A.
Poly U − 200-300 bp
B.
Poly A − 200-300 bp
C.
Poly C – 200-300 nucleotides
D.
Poly A - 200-300 nucleotides
Q319
Allen
10. NCERT BASED QUESTIONS
MCQ
DNA dependent RNA polymerases mediated synthesis of RNA over DNA called transcription. About it which of the following statement is wrong:-
A.
In bacteria m-RNA does not required any processing to become active
B.
In eukaryotes there is clear cut division of labour in RNA polymerases
C.
Absence of introns in RNA of eukaryotes is reminiscent of antiquity
D.
RNA polymerase - III is responsible for synthesis of snRNA
Q320
Allen
10. NCERT BASED QUESTIONS
MCQ
At which of the following levels, regulation of gene expression in eukaryotes do not occur: -
A.
Transcriptional initiation level
B.
Processing level
C.
Transport of ribosomal subunits from nucleus to cytoplasm level
D.
Translation level
Q321
Allen
10. NCERT BASED QUESTIONS
MCQ
In prokaryotes, predominant site for control of gene expression is the :-
A.
Control of processing of primary transcript
B.
Control of transcription initiation
C.
Control of transport of m-RNA from nucleus to cytoplasm
D.
Control of Translation BMI321
Q322
Allen
10. NCERT BASED QUESTIONS
MCQ
Which of the following was not involved in deciphering of genetic code?
A.
Physicist George Gamow's permutation combination of 4³ bases.
B.
H.G. Khorana's based synthesis of RNA molecules with defined combination of bases.
C.
Severo Ochoa enzyme for polymerising DNA with defined sequences.
D.
Marshall Nirenberg's cell free system for protein synthesis.
Q323
Allen
10. NCERT BASED QUESTIONS
MCQ
Which of the following mutation forms the genetic basis of proof that codon is a triplet and it is read in a continuous manner?
A.
Chromosomal structural mutations
B.
Chromosomal numerical mutations
C.
Substitutional mutation
D.
Frame shift insertion or deletion mutation BMI323
Q324
Allen
10. NCERT BASED QUESTIONS
MCQ
Change in a single base pair of DNA can be termed as:-
A.
Chromosomal aberrations
B.
Point mutation
C.
Genomatic mutation
D.
Aneuploidy
Q325
Allen
10. NCERT BASED QUESTIONS
MCQ
Which of the following cell cycle event is responsible for aneuploidy based on chromosomal disorders?
A.
Failure of G₁ phase
B.
Failure of DNA replication in S-phase
C.
Failure of segregation/Disjunction
D.
Failure of movement of chromosomes