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NEET

Molecular Basis of Inheritance

Biology

Previous Years Questions

MCQ (Single Correct Answer)

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If A and C make 30% and 20% of DNA, respectively, what will be the percentage composition of T and G?
NEET 2022 Phase 2
Against the codon 5' UAC 3', what would be the sequence of anticodon on tRNA?
NEET 2022 Phase 2
Match List - I with List - II. .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style...
NEET 2022 Phase 2
Given below are two statements Statement I : DNA polymerases catalyse polymerisation only in one direction, that is 5' →...
NEET 2022 Phase 2
In lac operon, z gene codes for
NEET 2022 Phase 2
In an E. Coli strain i gene gets mutated and its product can not bind the inducer molecule. If growth medium is provided...
NEET 2022
If a geneticist uses the blind approach for sequencing the whole genome of an organism, followed by assignment of functi...
NEET 2022
Transposons can be used during which one of the following?
NEET 2022
Read the following statements and choose the set of correct statements: (a) Euchromatin is loosely packed chromatin (b) ...
NEET 2022
DNA polymorphism forms the basis of:
NEET 2022
The process of translation of mRNA to proteins begins as soon as:
NEET 2022
Statement I : The codon 'AUG' codes for methionine and phenylalanine.Statement II : 'AAA' and 'AAG' both codons code for...
NEET 2021
Which one of the following statements about histones is wrong?
NEET 2021
Which is the "Only enzyme" that has "Capability" to catalyse Initiation, Elongation and Termination in the process of tr...
NEET 2021
Which of the following RNAs is not required for the synthesis of protein?
NEET 2021
If Adenine makes 30% of the DNA molecule, what will be the percentage of Thymine, Guanine and Cytosine in it?
NEET 2021
Identify the correct statement.
NEET 2021
DNA fingerprinting involves identifying differences in some specific regions in DNA sequence, called as
NEET 2021
What is the role of RNA polymerase III in the process of transcription in eukaryotes?
NEET 2021
Complete the flow chart on central dogma....
NEET 2021
DNA strands on a gel stained with ethidium bromide when viewed under UV radiation, appear as
NEET 2021
Name the enzyme that facilitates opening of DNA helix during transcription.
NEET 2020 Phase 1
The first phase of translation is
NEET 2020 Phase 1
Which of the following statements is correct?
NEET 2020 Phase 1
If the distance between two consecutive base pairs is 0.34 nm and the total number of base pairs of a DNA double helix i...
NEET 2020 Phase 1
The shorter and longer arms of a submetacentric chromosome are referred to as:
NEET 2019
Which of the following features of genetic code does allow bacteria to produce human insulin by recombinant DNA technolo...
NEET 2019
Under which of the following conditions will there be no change in the reading frame of following mRNA? 5' AACAGCGGUGCUA...
NEET 2019
Match the following genes of the Lac operon with their respective produces : .tg {border-collapse:collapse;border-spac...
NEET 2019
Expressed Sequence Tags (ESTs) refers to :
NEET 2019
Purines found both in DNA and RNA are:
NEET 2019
AGGTATCGCAT is a sequence from the coding strand of a gene. What will be the corresponding sequence of the transcribed m...
NEET 2018
All of the following are part of an operon except
NEET 2018
Many ribosomes may associate with a single mRNA to form multiple copies of a polypeptide simultaneously. Such strings of...
NEET 2018
Select the correct match :
NEET 2018
Select the correct statement :
NEET 2018
The experimental proof for semi-conservative replication of DNA was first shown in a
NEET 2018
Select the correct match :
NEET 2018
The association of histone H1 with a nucleosome indicates :
NEET 2017
Which of the following RNAs should be most abundant in animal cell ?
NEET 2017
During DNA replication, Okazaki fragments are used to elongate
NEET 2017
Spliceosomes are not found in cells of :
NEET 2017
If there are 999 bases in an RNA that codes for a protein with 333 amino acids, and the base at position 901 is deleted ...
NEET 2017
The final proof for DNA as the genetic material came from the experiments of
NEET 2017
A complex of ribosomes attached to a single strand of RNA is known as :
NEET 2016 Phase 1
Which of the following is required as inducer(s) for the expression of Lac operon?
NEET 2016 Phase 1
DNA-dependent RNA polymerase catalyzes transcription on one strand of the DNA which is called the
NEET 2016 Phase 2
Which one of the following is the starter codon ?
NEET 2016 Phase 1
Which of the following rRNAs acts as structural RNA as well as ribozyme in bacteria ?
NEET 2016 Phase 2
A molecule that can act as a genetic material must fulfill the traits given below, except
NEET 2016 Phase 2
The equivalent of a structural gene is -
NEET 2016 Phase 2
Taylor conducted the experiments to prove semiconservative mode of chromosome replication on
NEET 2016 Phase 2
In sea urchin DNA, which is double stranded, 17% of the bases were shown to be cytosine, The percentages of the other th...
AIPMT 2015 Cancelled Paper
Gene regulation governing lactose operon of E.coli that involves the lac I gene product is
AIPMT 2015 Cancelled Paper
Satellite DNA is important because it :
AIPMT 2015
Identify the correct order of organisation of genetic material from largest to smallest :
AIPMT 2015
Balbiani rings are sites of :
AIPMT 2015
Which one of the following is not applicable to RNA?
AIPMT 2015
Select the correct option ;
AIPMT 2014
Transformation was discovered by :
AIPMT 2014
In an inducible operon, the genes are :
NEET 2013 (Karnataka)
One of the most frequently used techniques in DNA fingerprinting is :-
NEET 2013 (Karnataka)
Genes of interest can be selected from a genomic library by using :
NEET 2013 (Karnataka)
Which of the following is not a property of the genetic code ?
NEET 2013 (Karnataka)
Satellite RNA are present in some :
NEET 2013 (Karnataka)
The figure gives an important concept in the genetic implication of DNA . Fill the blanks A, B and C....
NEET 2013 (Karnataka)
Which of the following statements is not true of two genes that show 50% recombination frequency ?
NEET 2013
Which enzyme will be produced in a cell in which there is a non-sense mutation in the lac Y gene ?
NEET 2013
The diagram shows an important concept in the genetic implication of DNA. Fill in the blanks A to C. ...
NEET 2013
Removal of RNA polymerase -III from nucleoplasm will affect the synthesis of
AIPMT 2012 Prelims
Ribosomal RNA is actively synthesized in
AIPMT 2012 Prelims
Which one of the following is not a part of a transcription unit in DNA ?
AIPMT 2012 Prelims
Removal of introns and joining of exons in a defined order during transcription is called
AIPMT 2012 Prelims
If one strand of DNA has the nitrogenous base sequence as ATCTG, what would be the complementary RNA stand sequence
AIPMT 2012 Prelims
What are those structures that appear as 'beads-on-string' in the chromosomes when viewed under electron microscope ?
AIPMT 2011 Prelims
The unequivocal proof of DNA as the genetic material came from the studies on a :
AIPMT 2011 Mains
Which one of the follwoing statements about the particular entity is true ?
AIPMT 2010 Mains
In eukaryotic cell transcription, RNA splicing and RNA capping take place inside the -
AIPMT 2010 Mains
Select the two correct statements out of the four (a-d) statements given below about lac operon. (a) Glucose or galacto...
AIPMT 2010 Prelims
The lac Operon consists of -
AIPMT 2010 Mains
The 3'-5' phosphodiester linkages inside a polynucleotide chain serve to join -
AIPMT 2010 Mains
The one aspect which is not a salient feature of genetic code, is its being –
AIPMT 2010 Prelims
Which one of the following palindromic base sequences in DNA can be easily cut at about the middle by some particular re...
AIPMT 2010 Prelims
Which one of the following does not follow the central dogma of molecular biology ?
AIPMT 2010 Prelims
What is not true for genetic code?
AIPMT 2009
Removal of introns and joining the exons in a defined order in a transcription unit is called :
AIPMT 2009
Whose experiments cracked the DNA and discovered unequivocally that a genetic code is a "triplet" ?
AIPMT 2009
Semi-conservative replication of DNA was first demonstrated in :
AIPMT 2009
Which one of the following pairs of codons is correctly matched with their function or the signal for the particular ami...
AIPMT 2008
Polysome is formed by
AIPMT 2008
Which one of the following pairs of nitrogenous bases of nucleic acids, is wrongly matched with the category mentioned a...
AIPMT 2008
In the DNA molecule:
AIPMT 2008
Amino acid sequence, in protein synthesis is decided by the sequence of -
AIPMT 2006
Which antibiotic inhibits interaction between tRNA and mRNA during bacterial protein synthesis ?
AIPMT 2006
Antiparallel strands of a DNA molecule means that-
AIPMT 2006
One gene-one enzyme hypothesis was postulated by -
AIPMT 2006
One turn of the helix in a B-form DNA is approximately -
AIPMT 2006
During transcription holoenzyme RNA polymerase binds to a DNA sequence and the DNA assumes a saddle like structure at th...
AIPMT 2005
Which one of the following makes use of RNA as a template to synthesize DNA -
AIPMT 2005
Protein synthesis in an animal cell occurs -
AIPMT 2005
Which one of the following hydrolyses internal phosphodiester bonds in a polynucleotide chain ?
AIPMT 2005
Using imprints from a plate with complete medium and carrying bacterial colonies, you can select streptomycin resistant ...
AIPMT 2005
Telomerase is an enzyme which is a -
AIPMT 2005
E. coli cells with a mustard z gene of the lac operon cannot grow in medium containing only lactose as the source of ene...
AIPMT 2005
The following ratio is generally constant for a given species :-
AIPMT 2004
In a mutational event, when adenine is replaced by guanine, it is a case of -
AIPMT 2004
After a mutation at a genetic locus the character of an organism changes due to the change in :-
AIPMT 2004
Which form of RNA has a structure resembling clover leaf ?
AIPMT 2004
During transcription, if the nucleotide sequence of the DNA strand that is being coded is ATACG, then the nucleotide seq...
AIPMT 2004
Which one of the following triplet codes, is correctly matched with its specificity for an amino acid in protein synthes...
AIPMT 2003
What does "lac" refer to in what we call the lac operon ?
AIPMT 2003
During transcription, the DNA site at which RNA polymerase binds is called :-
AIPMT 2003
Degeneration of a genetic code is attributed to the : -
AIPMT 2003
What would happen if in a gene encoding a polypeptide of 50 amino acids, 25th codon (UAU) is mutated to UAA ?
AIPMT 2003
In the genetic code dictionary, how many codons are used to code for all the 20 essential amino acids : -
AIPMT 2003
During translation initiation in prokaryotes, a GTP molecule is needed in : -
AIPMT 2003
Change in sequence of nucleotide in DNA is called as -
AIPMT 2002
Out of 64 codons, 61 codons code for 20 types of amino acid it is called : -
AIPMT 2002
Which of the following reunites the exon segments after RNA splicing ?
AIPMT 2002
Which of the following enzymes are used to join bits of DNA ?
AIPMT 2002
Exon part of m-RNAs have code for : -
AIPMT 2002
In E. Coli, during lactose metabolism repressor binds to : -
AIPMT 2002
Transformation experiment was first performed on which bacteria : -
AIPMT 2002
Jacob and Monad studied lactose metabolism in E.Coli and proposed operon concept. Operon concept applicable for :
AIPMT 2002
In a DNA percentage of thymine is 20% then what is the percentage of guanine : -
AIPMT 2002
Types of RNA polymerase required in nucleus for RNA synthesis : -
AIPMT 2001
Gene and cistron words are sometimes used synonymously because : -
AIPMT 2001
In Negative operon : -
AIPMT 2001
m-RNA is synthesised on DNA template in which direction : -
AIPMT 2001
Similarity in DNA and RNA :
AIPMT 2000
Anticodon occurs in :
AIPMT 2000
In three dimensional view the molecule of t-RNA is :
AIPMT 2000
Length of one loop of B- DNA :
AIPMT 2000
Method of DNA replication in which two strands of DNA separates and synthesize new strands
AIPMT 2000
Which of the following is initiation codon ?
AIPMT 2000

MCQ (More than One Correct Answer)

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Which one of the following is wrongly matched?
AIPMT 2014

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