In a water molecule,which bond connects the hydrogen and oxygen atoms?

$A$: Water is an efficient solvent.
$R$: Polar nature is an important property of water.

Identify the substances among the following that contain both glycosidic and peptide bonds in their structure.

The figure given below shows three velocity-substrate concentration curves for an enzyme reaction. What do the curves $a, b$ and $c$ depict respectively?

Which vitamin gets destroyed by heating?

Which one of the following vitamins contains a metal atom?