2005
NEET
MCQ
AIPMT 2005
Which one of the following makes use of RNA
as a template to synthesize DNA -
A.
Reverse transcriptase
B.
DNA dependant RNA polymerase
C.
RNA polymerase
D.
DNA polymerase
2005
NEET
MCQ
AIPMT 2005
During transcription holoenzyme RNA
polymerase binds to a DNA sequence and the
DNA assumes a saddle like structure at the point.
What is the sequence called ?
A.
TATA box
B.
GGTT box
C.
CAAT box
D.
AAAT box
2005
NEET
MCQ
AIPMT 2005
Protein synthesis in an animal cell occurs -
A.
On ribosomes present in the nucleolus as
well as in cytoplasm
B.
On ribosomes presents in cytoplasm as well
as in mitochondria
C.
Only on the ribosomes present in cytosol
D.
Only on ribosomes attached to the nuclear
envelope and endoplasmic reticulum
2005
NEET
MCQ
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 energy because -
A.
They cannot transport lactose from the
medium into the cell
B.
They cannot synthesize functional beta
galactosidase
C.
In the presence of glucose, E. coli cells do
not utilize lactose
D.
The lac operon is constitutively active in
these cells
2004
NEET
MCQ
AIPMT 2004
In a mutational event, when adenine is replaced
by guanine, it is a case of -
A.
Frameshift mutation
B.
Transition
C.
Transversion
D.
Transcription
2004
NEET
MCQ
AIPMT 2004
Which form of RNA has a structure resembling
clover leaf ?
A.
r-RNA
B.
m-RNA
C.
t-RNA
D.
hn-RNA
2004
NEET
MCQ
AIPMT 2004
The following ratio is generally constant for a
given species :-
A.
A + C / T + G
B.
G + C / A+ T
C.
A + G / C +T
D.
T + C / G + A
2004
NEET
MCQ
AIPMT 2004
After a mutation at a genetic locus the character
of an organism changes due to the change in :-
A.
Protein synthesis pattern
B.
RNA transcription pattern
C.
DNA replication
D.
Protein structure
2004
NEET
MCQ
AIPMT 2004
During transcription, if the nucleotide sequence
of the DNA strand that is being coded is
ATACG, then the nucleotide sequence in the
mRNA would be -
A.
UAUGC
B.
TCTGG
C.
UATGC
D.
TATGC
2003
NEET
MCQ
AIPMT 2003
During translation initiation in prokaryotes, a
GTP molecule is needed in : -
A.
Association of 30S mRNA with formy-lmet-tRNA
B.
Formation of formyl-met-tRNA
C.
Association of 50S subunit of ribosome
with initiation complex
D.
Binding of 30S subunit of ribosome with
mRNA
2003
NEET
MCQ
AIPMT 2003
In the genetic code dictionary, how many
codons are used to code for all the 20 essential
amino acids : -
A.
64
B.
20
C.
60
D.
61
2003
NEET
MCQ
AIPMT 2003
Degeneration of a genetic code is attributed to
the : -
A.
Second member of a codon
B.
Third member of a codon
C.
First member of a codon
D.
Entire codon
2003
NEET
MCQ
AIPMT 2003
What does "lac" refer to in what we call the lac
operon ?
A.
The number 1,00,000
B.
Lac insect
C.
Lactase
D.
Lactose
2003
NEET
MCQ
AIPMT 2003
Which one of the following triplet codes, is
correctly matched with its specificity for an
amino acid in protein synthesis or as 'start' or
'stop' codon ?
A.
UUU – Stop
B.
UAC – Tyrosine
C.
UGU – Leucine
D.
UCG – Start
2003
NEET
MCQ
AIPMT 2003
What would happen if in a gene encoding a
polypeptide of 50 amino acids, 25th codon
(UAU) is mutated to UAA ?
A.
A polypeptide of 49 amino acids will be
formed
B.
A polypeptide of 25 amino acids will be
formed
C.
Two polypeptides of 24 and 25 amino acids
will be formed
D.
A polypeptide of 24 amino acids will be
formed
2003
NEET
MCQ
AIPMT 2003
During transcription, the DNA site at which
RNA polymerase binds is called :-
A.
Receptor
B.
Regulator
C.
Enhancer
D.
Promoter
2002
NEET
MCQ
AIPMT 2002
Transformation experiment was first performed
on which bacteria : -
A.
Diplococcus pneumoniae
B.
Pasteurella pestis
C.
E. coli
D.
Salmonella
2002
NEET
MCQ
AIPMT 2002
Which of the following reunites the exon
segments after RNA splicing ?
A.
RNA polymerase
B.
RNA proteases
C.
RNA primase
D.
RNA ligase
2002
NEET
MCQ
AIPMT 2002
Change in sequence of nucleotide in DNA is
called as -
A.
Recombination
B.
Mutation
C.
Mutagen
D.
Translation
2002
NEET
MCQ
AIPMT 2002
In a DNA percentage of thymine is 20% then
what is the percentage of guanine : -
A.
40%
B.
20%
C.
30%
D.
60%
2002
NEET
MCQ
AIPMT 2002
Which of the following enzymes are used to join
bits of DNA ?
A.
Endonuclease
B.
DNA polymerase
C.
Ligase
D.
Primase
2002
NEET
MCQ
AIPMT 2002
Out of 64 codons, 61 codons code for 20 types
of amino acid it is called : -
A.
Wobbling of codon
B.
Universility of codons
C.
Overlapping of gene
D.
Degeneracy of genetic code
2002
NEET
MCQ
AIPMT 2002
In E. Coli, during lactose metabolism repressor
binds to : -
A.
Promoter gene
B.
Operator gene
C.
Structural gene
D.
Regulator gene
2002
NEET
MCQ
AIPMT 2002
Exon part of m-RNAs have code for : -
A.
Lipid
B.
Protein
C.
Phospholipid
D.
Carbohydrate
2002
NEET
MCQ
AIPMT 2002
Jacob and Monad studied lactose metabolism in
E.Coli and proposed operon concept. Operon
concept applicable for :
A.
All prokaryotes and all eukaryotes
B.
All prokaryotes and some protozoanes
C.
All prokaryotes
D.
All prokaryotes and some eukaryotes
2001
NEET
MCQ
AIPMT 2001
m-RNA is synthesised on DNA template in
which direction : -
A.
Any
B.
Both (c) and (d)
C.
5' → 3'
D.
3' → 5'
2001
NEET
MCQ
AIPMT 2001
Types of RNA polymerase required in nucleus
for RNA synthesis : -
A.
2
B.
3
C.
1
D.
4
2001
NEET
MCQ
AIPMT 2001
Gene and cistron words are sometimes used
synonymously because : -
A.
One gene contains one cistron
B.
One cistron contains many gene
C.
One gene contains no cistron
D.
One gene contains many cistrons
2001
NEET
MCQ
AIPMT 2001
In Negative operon : -
A.
CAMP have negative effect on lac operon
B.
Co-repressor binds with inducer
C.
Co-repressor binds with repressor
D.
Co-repressor does not binds with repressor
2000
NEET
MCQ
AIPMT 2000
Length of one loop of B- DNA :
A.
20 nm.
B.
10 nm.
C.
3.4 nm.
D.
0.34 nm.
2000
NEET
MCQ
AIPMT 2000
Method of DNA replication in which two
strands of DNA separates and synthesize new
strands
A.
Conservative
B.
Non conservative
C.
Dispersive
D.
Semiconservative
2000
NEET
MCQ
AIPMT 2000
In three dimensional view the molecule of
t-RNA is :
A.
E-shaped
B.
L-shaped
C.
S-shaped
D.
Y-shaped
2000
NEET
MCQ
AIPMT 2000
Which of the following is initiation codon ?
A.
AUC
B.
CCU
C.
UAG
D.
AUG
2000
NEET
MCQ
AIPMT 2000
Anticodon occurs in :
A.
DNA
B.
r-RNA
C.
t-RNA
D.
m-RNA
2000
NEET
MCQ
AIPMT 2000
Similarity in DNA and RNA :
A.
Both have similar sugar
B.
Both are genetic material
C.
Both have similar pyrimidine
D.
Both are polymer of nucleotides