1
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
What is not true for genetic code?
A
It is nearly universal
B
A codon in mRNA is read in a noncontiguous fashion
C
It is degenerate
D
It is unambiguous
2
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
The genetic defect-adenosine deaminase (ADA) deficiency may be cured permanently by
A
Introducing bone marrow cells producing ADA into cells at early embryonic stages
B
Periodic infusion of genetically engineered lymphocytes having functional ADA cDNA
C
Administering adenosine deaminase activators
D
Enzyme replacement therapy
3
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
Sickle-cell anemia is :
A
Caused by substitute of valine by glutamic acid in the beta globin chain of haemoglobin
B
An autosomal linked dominant trait
C
Caused by a change in a single base pair of DNA
D
Characterized by elongated sickle like RBCs with a nucleus
4
AIPMT 2009
MCQ (Single Correct Answer)
+4
-1
Semi-conservative replication of DNA was first demonstrated in :
A
Drosophila melanogaster
B
Streptococcus pneumoniae
C
Salmonella typhimurium
D
Escherichia coli