Which of the following detergents is used as a germicide?

Which drug is used to reduce mental tension and induce mental calmness?

Which of the following is not a broad-spectrum antibiotic?

Which of the following is an antidepressant drug?

The following compound is used as:

Which of the following statements are correct?
$I$. Binding of inhibitor at allosteric site changes the shape of the active site.
$II$. Shape of the receptor does not change after attachment of chemical messenger to it.
$III$. $A$ chemical messenger gives message to the cell by entering it.
$IV$. Erythromycin is an example of bacteriostatic antibiotic.