1
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
Change Language
Gene regulation governing lactose operon of E.coli that involves the lac I gene product is
A
negative and inducible because repressor protein prevents transcription.
B
positive and inducible because it can be induced by lactose
C
negative and repressible because repressor protein prevents transcription
D
feedback inhibition because excess of $$\beta $$-galactosidase can switch off transcription
2
AIPMT 2014
MCQ (Single Correct Answer)
+4
-1
Change Language
Select the correct option ;
A
Direction of RNA synthesis 3’−5’, Direction of reading of the template DNA strand 5’−3’
B
Direction of RNA synthesis 5’−3’, Direction of reading of the template DNA strand 5’−3’
C
Direction of RNA synthesis 5’−3’, Direction of reading of the template DNA strand 3’−5’
D
Direction of RNA synthesis 3’−5’, Direction of reading of the template DNA strand 3’−5’
3
AIPMT 2014
MCQ (Single Correct Answer)
+4
-1
Change Language
Transformation was discovered by :
A
Griffith
B
Watson and Crick
C
Hershey and Chase
D
Meselson and Stahl
4
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
Change Language
In an inducible operon, the genes are :
A
usually expressed unless a signal turns them "off"
B
always expressed
C
never expressed
D
usually not expressed unless a signal turns them "on"
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