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Molecular Basis Of Inheritance

394 Questions Start Allen Test
All Exams Allen
Q226 Allen 9. Molecular Basis of Inheritance MCQ
The term 'Nuclein' for the genetic material was used by :-
A.
Franklin
B.
Miescher
C.
Chargaff
D.
Mendel
Q227 Allen 9. Molecular Basis of Inheritance MCQ
In the polynucleotide chain of DNA, a nitrogenous base is linked to the -OH of:-
A.
2'C pentose sugar
B.
3'C pentose sugar
C.
5'C pentose sugar
D.
1'C pentose sugar
Q228 Allen 9. Molecular Basis of Inheritance MCQ
Which is the basis of genetic mapping of human genome as well as DNA finger printing
A.
Polymorphism in DNA sequence
B.
Single nucleotide polymorphism
C.
Polymorphism in hnRNA sequence
D.
Polymorphism in RNA sequence
Q229 Allen 9. Molecular Basis of Inheritance MCQ
Complete the flow chart on central dogma:-
(a) DNA ──(b) Transcription──→ mRNA ──(c) Translation──→ (d) Protein
A.
(a)-Replication; (b)-Transcription; (c)-Transduction; (d)-Protein
B.
(a)-Translation; (b)-Replication; (c)-Transcription; (d)-Transduction
C.
(a)-Replication; (b)-Transcription; (c)-Translation; (d)-Protein
D.
(a)-Transduction; (b)-Translation; (c)-Replication; (d)-Protein
Q230 Allen 9. Molecular Basis of Inheritance MCQ
Identify the correct statement:-
A.
In capping, methyl guanosine triphosphate is added to the 3' end of hnRNA.
B.
RNA polymerase binds with Rho factor to terminate the process of transcription in bacteria.
C.
The coding strand in a transcription unit is copied to an mRNA.
D.
Split gene arrangement is characteristic of prokaryotes.
Q231 Allen 9. Molecular Basis of Inheritance MCQ
What is the role of RNA polymerase IIl in the process of transcription in eukaryotes?
A.
Transcribes rRNAs (28S, 18S and 5.8S)
B.
Transcribes tRNA, 5S rRNA and snRNA
C.
Transcribes precursor of mRNA
D.
Transcribes only snRNAs
Q232 Allen 9. Molecular Basis of Inheritance MCQ
DNA fingerprinting involves identifying differences in some specific regions in DNA sequence, called as :-
A.
Satellite DNA
B.
Repetitive DNA
C.
Single nucleotides
D.
Polymorphic DNA
Q233 Allen 9. Molecular Basis of Inheritance MCQ
Which is the “Only enzyme" that has "Capability" tocatalyse Initiation, Elongation and Termination in the process of transcription in prokaryotes?
A.
DNA dependent DNA polymerase
B.
DNA dependent RNA polymerase
C.
DNA Ligase
D.
DNase
Q234 Allen 9. Molecular Basis of Inheritance MCQ
Which of the following RNAs is not required for the synthesis of protein?
A.
mRNA
B.
tRNA
C.
rRNA
D.
siRNA
Q235 Allen 9. Molecular Basis of Inheritance MCQ
If Adenine makes 30% of the DNA molecule, what will be the percentage of Thymine, Guanine and Cytosine in it?
A.
T :20; G:30; C:20
B.
T:20; G:20; C:30
C.
T :30; G:20; C:20
D.
T:20; G:25; C:25
Q236 Allen 9. Molecular Basis of Inheritance MCQ
Read the following statements and choose the set of correct statements: -
(a) Euchromatin is loosely packed chromatin.
(b) Heterochromatin is transcriptionally active
(c) Histone octamer is wrapped by negatively charged DNA in nucleosome.
(d) Histones are rich in lysine and arginine.
(e) A typical nucleosome contains 400 bp of DNA helix.
A.
(a), (c), (d) Only
B.
(b), (e) Only
C.
(a), (c), (e) Only
D.
(b), (d), (e) Only
Q237 Allen 9. Molecular Basis of Inheritance MCQ
DNA polymorphism forms the basis of:-
A.
DNA finger printing
B.
Both genetic mapping and DNA finger printing
C.
Translation
D.
Genetic mapping
Q238 Allen 9. Molecular Basis of Inheritance MCQ
The process of translation of mRNA to proteins begins as soon as :-
A.
The larger subunit of ribosome encounters mRNA.
B.
Both the subunits join together to bind with mRNA.
C.
The tRNA is activated and the larger subunit of ribosome encounters mRNA.
D.
The small subunit of ribosome encounters mRNA.
Q239 Allen 9. Molecular Basis of Inheritance MCQ
If a geneticist uses the blind approach for sequencing the whole genome of an organism, followed by assignment of function to different segments, the methodology adopted by him is called as:-
A.
Gene mapping
B.
Expressed sequence tags
C.
Bioinformatics
D.
Sequence annotation BMI269
Q240 Allen 9. Molecular Basis of Inheritance MCQ
In an E. coli strain i gene gets mutated and its product can not bind the inducer molecule. If growth medium is provided with lactose, what will be the outcome?
A.
z, y, a genes will be transcribed
B.
z, y, a genes will not be translated
C.
RNA polymerase will bind the promoter region
D.
Only z gene will get transcribed
Q241 Allen 9. Molecular Basis of Inheritance MCQ
If the length of a DNA molecule is 1.1 metres, what will be the approximate number of base pairs ?
A.
$6 . 6 \times 1 0 ^ { 9 } \mathsf { b p }$
B.
$3 . 3 \times 1 0 ^ { 6 } \mathsf { b p }$
C.
$6 . 6 \times 1 0 ^ { 6 } \mathsf { b p }$
D.
$3 . 3 \times 1 0 ^ { 9 } \mathrm { b p }$
Q242 Allen 9. Molecular Basis of Inheritance MCQ
Ten E. coli cells with15N - dsDNA are incubated in medium containing 14N nucleotide. After 60 minutes, how many E. coli cells will have DNA totally free from 15N :
A.
40 cells
B.
60 cells
C.
80 cells
D.
20 cells
Q243 Allen 9. Molecular Basis of Inheritance Match the Columns
Match Column-I with Column-II :
Column-IColumn-II
(a)Bacteriophage φ × 174
(b)Bacteriophage lambda
(c)Escherichia coli
(d)Haploid content of human DNA
(i)48502 base pairs
(ii)5386 nucleotides
(iii)3.3 × 10⁹ base pairs
(iv)4.6 × 10⁹ base pairs
A.
(a) - (iii),(b) - (ii), (c)-(i), (d)-(iv)
B.
(a) - (iv), (b) - (iii),(c)-(ii),(d)-(i)
C.
(a) - (iv), (b) - (i), (c)-(iii),(d)-(ii)
D.
(a) - (iii),(b) - (i), (c)-(iv), (d)-(ii)
Q244 Allen 9. Molecular Basis of Inheritance MCQ
Given below are two statements: Statement I :- DNA polymerases catalyse polymerisation only in one direction, that is $5 ^ { \prime } 3 ^ { \prime }$ Statement II :- During replication of DNA, on one strand the replication is continuous while on the other strand it is discontinuous. In the light of the above statements, choose the correct answer from the options given below :
A.
Both Statement I and Il are correct
B.
Both Statement I and II are incorrect
C.
Statement I is correct but Statement II is incorrect
D.
Statement I is incorrect but Statement II is correct
Q245 Allen 9. Molecular Basis of Inheritance Match the Columns
Match Column-I with Column-II :-
Column-IColumn-II
(a)Bacteriophage φ × 174
(b)Bacteriophage lambda
(c)Escherichia coli
(d)Haploid content of human DNA
(i)48502 base pairs
(ii)5386 nucleotides
(iii)3.3 × 10⁹ base pairs
(iv)4.6 × 10⁹ base pairs
A.
(a) - (i), (b) - (ii), (c) - (iii),(d) - (iv)
B.
(a) - (ii),(b) - (iv), (c) - (i), (d) - (iii)
C.
(a) - (ii),(b) - (i), (c) - (iv), (d) - (iii
D.
(a) - (i), (b) - (ii), (c) - (iν),(d) - (iii)
Q246 Allen 9. Molecular Basis of Inheritance MCQ
If DNA contained sulphur instead of phosphorus and proteins contained phosphorus instead of sulfur, what would have been the outcome of Hershey and Chase experiment?
A.
No radioactive sulfur in bacterial cells
B.
Both radioactive sulfur and phosphorus in bacterial cells
C.
Radioactive sulfur in bacterial cells
D.
Radioactive phosphorus in bacterial Cells
Q247 Allen 9. Molecular Basis of Inheritance MCQ
In lac operon, z gene codes for :-
A.
β-galactosidase
B.
Permease
C.
Repressor
D.
Transacetylase BMI277
Q248 Allen 9. Molecular Basis of Inheritance MCQ
Unequivocal proof that DNA is the genetic material was first proposed by
A.
Alfred Hershey and Martha Chase
B.
Avery, MacLeod and McCarthy
C.
Wilkins and Franklin
D.
Frederick Griffith
Q249 Allen 9. Molecular Basis of Inheritance MCQ
Among eukaryotes, replication of DNA takes place in -
A.
S phase
B.
G₁ phase
C.
G₂ phase
D.
M phase
Q250 Allen 9. Molecular Basis of Inheritance MCQ
What is the role of RNA polymerase III in the process of transcription in Eukaryotes ?
A.
Transcription of tRNA, 5S rRNA and snRNA
B.
Transcription of precursor of mRNA
C.
Transcription of only snRNAs
D.
Transcription of rRNAs (28S, 18S and 5.8S)