1
AIPMT 2005
MCQ (Single Correct Answer)
+4
-1
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
2
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
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
3
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
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
4
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
Which form of RNA has a structure resembling clover leaf ?
A
r-RNA
B
m-RNA
C
t-RNA
D
hn-RNA
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