Insertion of a foreign DNA at BamHI site in an E.coli cloning vector pBR322 results in the loss of antibiotic resistance towards:
Ampicillin and tetracycline
Ampicillin
Tetracycline
Gentamycin
The following reaction depicts the activity of a particular class of enzymes :
Identify the enzymes class ' $E$ ' from the following options :
Transferases
Isomerases
Lyases
Ligases
The specific receptors for neurotransmitters in a synapse are present on $\_\_\_\_$ .
Schwann cell
Pre-synaptic membrane
Myelin sheath
Post-synaptic membrane
What is the probability of having children with 'O' blood group, where both mother and father are heterozygous for ' $\underline{\mathrm{A}}$ ' and ' $\underline{\mathrm{B}}$ ' blood group, respectively?
$25 \%$
$0 \%$
$75 \%$
$50 \%$
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