1
AIPMT 2005
MCQ (Single Correct Answer)
+4
-1
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
2
AIPMT 2005
MCQ (Single Correct Answer)
+4
-1
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
3
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
4
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
In a mutational event, when adenine is replaced by guanine, it is a case of -
A
Frameshift mutation
B
Transition
C
Transversion
D
Transcription

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