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Molecular Basis Of Inheritance

866 Questions MCQ (Single Correct) Start Allen Test
All Exams Allen Errorless
NEET 2024 Q1 Errorless Critical Thinking MCQ
The lactose present in the growth medium of bacteria is transported to the cell by the action of
A.
Beta-galactosidase
B.
Acetylase
C.
Permease
D.
Polymerase
NEET 2024 Q2 Errorless Critical Thinking MCQ
A transcription unit in DNA is defined primarily by the three regions in DNA and these are with respect to upstream and down stream end
A.
Repressor, Operator gene, Structural gene
B.
Structural gene, Transposons, Operator gene
C.
Inducer, Repressor, Structural gene
D.
Promotor, Structural gene, Terminator
NEET 2024 Q3 Errorless Critical Thinking MCQ
Which of the following statement is correct regarding the process of replication in E.coli
A.
The DNA dependent DNA polymerase catalyses polymerization in one direction that is $3'\rightarrow5'$
B.
The DNA dependent RNA polymerase catalyses polymerization in one direction that is $5'\rightarrow3'$
C.
The DNA dependent DNA polymerase catalyses polymerization in $5'\rightarrow3'$ as well as $3'\rightarrow5'$ direction
D.
The DNA dependent DNA polymerase catalyses polymerization in 5'ā†’3' direction
NEET 2024 Q4 Errorless Critical Thinking MCQ
Match Column-I with Column-II
Column-IColumn-II
(A)Frederick Griffith
(B)FranƧois Jacob & Jacques Monod
(C)Har Gobind Khorana
(D)Meselson & Stahl
(P)Genetic code
(Q)Semi-conservative mode of DNA replication
(R)Transformation
(S)Lac operon
A.
Aā€“R, Bā€“Q, Cā€“P, Dā€“S
B.
Aā€“R, Bā€“S, Cā€“P, Dā€“Q
C.
Aā€“Q, Bā€“R, Cā€“S, Dā€“P
D.
Aā€“S, Bā€“P, Cā€“Q, Dā€“R
NEET 2024 Q5 Errorless Critical Thinking MCQ
Which one is the correct product of DNA dependent RNA polymerase to the given template 3'TACATGGCAAATATCCATTCA5'
A.
5'AUGUACCGUUUAUAGGUAAGU3'
B.
5'AUGUAAAGUUUAUAGGUAAGU3'
C.
5'AUGUACCGUUUAUAGGGAAGU3'
D.
5'ATGTACCGTTTATAGGTAAGT3'
NEET 2024 Q6 Errorless Critical Thinking MCQ
Match Column-I with Column-II
Column-IColumn-II
(A)RNA polymerase III
(B)Termination of transcription
(C)Splicing of Exons
(D)TATA box
(P)snRNPs
(Q)Promotor
(R)Rho factor
(S)snRNAs, tRNA
A.
Aā€“Q, Bā€“S, Cā€“P, Dā€“R
B.
Aā€“R, Bā€“Q, Cā€“S, Dā€“P
C.
Aā€“R, Bā€“S, Cā€“P, Dā€“Q
D.
Aā€“S, Bā€“R, Cā€“P, Dā€“Q
NEET 2023 Q7 Errorless Critical Thinking MCQ
Frequency of recombination between gene pairs on same chromosome as a measure of the distance between genes to map their position on chromosome, was used for the first time by
A.
Sutton and Boveri
B.
Alfred Sturtevant
C.
Henking
D.
Thomas Hunt Morgan
NEET 2023 Q8 Errorless Critical Thinking MCQ
Unequivocal proof that DNA is the genetic material was first proposed by
A.
Alfred Hershey and Martha Chase
B.
Avery, Macleoid and McCarthy
C.
Wilkins and Franklin
D.
Frederick Griffith
NEET 2023 Q9 Errorless Critical Thinking 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)
NEET 2023 Q10 Errorless Critical Thinking MCQ
How many different proteins does the ribosome consist of
A.
60
B.
40
C.
20
D.
80
NEET 2023 Q11 Errorless Critical Thinking MCQ
Given below are two statements In the light of the above statements, choose the correct answer from the options given below
A.
If both assertion and reason are true and the reason is the correct explanation of the assertion.
B.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
C.
If assertion is true but reason is false.
D.
If the assertion and reason both are false.
E.
If assertion is false but reason is true.
NEET 2023 Q12 Errorless Critical Thinking MCQ
Given below are two statements: Statement I: In prokaryotes, the positively charged DNA is held with some negatively charged proteins in a region called nucleoid. Statement II: In eukaryotes, the negatively charged DNA is wrapped around the positively charged histone octamer to form nucleosome. In the light of the above statements, choose the correct answer from the options given below
A.
If both assertion and reason are true and the reason is the correct explanation of the assertion.
B.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
C.
If assertion is true but reason is false.
D.
If the assertion and reason both are false.
E.
If assertion is false but reason is true.
NEET 2023 Q13 Errorless Critical Thinking MCQ
Which one of the following is the sequence on corresponding coding strand, if the sequence on mRNA formed is as follows 5' AUCGAUCGAUCGAUCGAUCGAUCGAUCG3'
A.
3' UAGCUAGCUAGCUAGCUAGCUAGCUAGC 5'
B.
5' ATCGATCGATCGATCGATCGATCGATCG 3'
C.
3' ATCGATCGATCGATCGATCGATCGATCG 5'
D.
5' UAGCUAGCUAGCUAGCUAGCUAGCUAGC 3'
NEET 2022 Q14 Errorless Critical Thinking 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 octomer 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.
B, E only
B.
A, C, E only
C.
B, D, E only
D.
A, C, D only
NEET 2022 Q15 Errorless Critical Thinking MCQ
DNA polymorphism forms the basis of
A.
Both genetic mapping and DNA finger printing
B.
Translation
C.
Genetic mapping
D.
DNA finger printing
NEET 2022 Q16 Errorless Critical Thinking MCQ
Transposons can be used during which one of the following
A.
Autoradiography
B.
Gene sequencing
C.
Polymerase Chain Reaction
D.
Gene silencing
NEET 2022 Q17 Errorless Critical Thinking MCQ
If the length of a DNA molecule is 1.1 metres, what will be the approximate number of base pairs Or The haploid content of human DNA is [Kerala PMT 2008, 11]
A.
$3.3 \times 10^{6} bp$
B.
$6.6 \times 10^{6} bp$
C.
$3.3 \times 10^{9} bp$
D.
$6.6 \times 10^{9} bp$
NEET 2022 Q18 Errorless Critical Thinking 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 not be translated
B.
RNA polymerase will bind the promoter region
C.
Only z gene will get transcribed
D.
z, y, a genes will be transcribed
NEET 2022 Q19 Errorless Critical Thinking MCQ
Given below are two statements Statement I : Restriction endonucleases recognise specific sequence to cut DNA known as palindromic nucleotide sequence. Statement II : Restriction endonucleases cut the DNA strand a little away from the centre of the palindromic site. In the light of the above statement, choose the most appropriate answer from the options given below
A.
If both assertion and reason are true and the reason is the correct explanation of the assertion.
B.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
C.
If assertion is true but reason is false.
D.
If the assertion and reason both are false.
E.
If assertion is false but reason is true.
NEET 2022 Q20 Errorless Critical Thinking MCQ
The recombination frequency between the genes $a$ and $c$ is $5\%$ , $b$ and $c$ is $15\%$ , $b$ and $d$ is $9\%$ , $a$ and $b$ is $20\%$ , $c$ and $d$ is $24\%$ , and $a$ and $d$ is $29\%$ . What will be the sequence of these genes on a linear chromosome
A.
$a, b, c, d$
B.
$a, c, b, d$
C.
$a, d, b, c$
D.
$d, b, a, c$
NEET 2022 Q21 Errorless Critical Thinking MCQ
Ten E.coli cells with ${}^{15}N$ -dsDNA are incubated in medium containing ${}^{14}N$ nucleotide. After 60 minutes, how many E.coli cells will have DNA totally free from ${}^{15}N$
A.
60 cells
B.
80 cells
C.
20 cells
D.
40 cells
NEET 2021 Q22 Errorless Critical Thinking MCQ
Complete the flow chart on central dogma (A) $\xrightarrow{(DNA\xrightarrow{(B)}mRNA\xrightarrow{(C)}(D)}$
A.
(A)-Translation; (B)-Replication; (C)-Transcription; (D)-Transduction
B.
(A)-Replication; (B)-Transcription; (C)-Translation; (D)-Protein
C.
(A)-Transduction; (B)-Translation; (C)-Replication; (D)-Protein
D.
(C)-Replication; (D)-Transcription; (C)-Transduction; (D)-Protein
NEET 2021 Q23 Errorless Critical Thinking MCQ
DNA fingerprinting involves identifying differences in some specific regions in DNA sequence, called as
A.
Repetitive DNA
B.
Single nucleotides
C.
Polymorphic DNA
D.
Satellite DNA
NEET 2021 Q24 Errorless Critical Thinking MCQ
Identify correct statement
A.
RNA polymerase binds with Rho factor to terminate the process of transcription in bacteria
B.
The coding strand in a transcription unit is copied to an mRNA
C.
Split gene arrangement is characteristic of prokaryotes
D.
In capping, methyl guanosine triphosphate is added to the 3' end of hn RNA
NEET 2021 Q25 Errorless Critical Thinking MCQ
What is the role of RNA polymerase III in the process of transcription in eukaryotes
A.
Transcribes tRNA, 5s rRNA and snRNA
B.
Transcribes precursor of mRNA
C.
Transcribes only snRNAs
D.
Transcribes rRNAs (28S, 18S and 5.8S)