1
AIPMT 2005
MCQ (Single Correct Answer)
+4
-1
A women with 47 chromosomes due to three copies of chromosome 21 is characterized by
A
triploidy
B
Down’s syndrome
C
superfemaleness
D
Turner’s syndrome
2
AIPMT 2005
MCQ (Single Correct Answer)
+4
-1
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
3
AIPMT 2005
MCQ (Single Correct Answer)
+4
-1
A man and a woman, who do not show any apparent signs of a certain inherited disease, have seven children (2 daughter and 5 sons). Three of the sons suffer from the given disease but none of the daughters are affected. Which of the following mode of inheritance do you suggest for this disease
A
Autosomal dominant
B
Sex-linked recessive
C
Sex-linked dominant
D
Sex-limited recessive
4
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