Antigen binding site in an antibody is formed by
Two light chains
Two heavy chains
One heavy and one light chain
Either between two light chains or between one heavy and one light chain depending upon the nature of antigen
‘Plague' is transmitted by
Which one of the following pairs of diseases is viral as well as transmitted by mosquitoes ?
Read the following statements
$a.$ Heroin, commonly called smack, is obtained by acetylation of morphine.
$b.$ Cocaine is obtained from the latex of Papaver somniferum.
$c.$ Dopamine is excitatory neurotransmitter.
$d.$ Morphine is an effective sedative and pain killer.
Mark the option which includes both correct statement