1
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
What does "lac" refer to in what we call the lac operon ?
A
The number 1,00,000
B
Lac insect
C
Lactase
D
Lactose
2
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
During translation initiation in prokaryotes, a GTP molecule is needed in : -
A
Association of 30S mRNA with formy-lmet-tRNA
B
Formation of formyl-met-tRNA
C
Association of 50S subunit of ribosome with initiation complex
D
Binding of 30S subunit of ribosome with mRNA
3
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
What would happen if in a gene encoding a polypeptide of 50 amino acids, 25th codon (UAU) is mutated to UAA ?
A
A polypeptide of 49 amino acids will be formed
B
A polypeptide of 25 amino acids will be formed
C
Two polypeptides of 24 and 25 amino acids will be formed
D
A polypeptide of 24 amino acids will be formed
4
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
Which one of the following triplet codes, is correctly matched with its specificity for an amino acid in protein synthesis or as 'start' or 'stop' codon ?
A
UUU – Stop
B
UAC – Tyrosine
C
UGU – Leucine
D
UCG – Start
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