The enzyme enterokinase helps in the conversion of $............$.

Which of the following is not an 'antibiotic'?

The essential chemical components of many coenzymes are

If $\alpha$ and $\beta$ are the roots of the equation $ax^2+bx+c=0$ and the equation having roots $\frac{1-\alpha}{\alpha}$ and $\frac{1-\beta}{\beta}$ is $px^2+qx+r=0$,then $r=$

Let $f(x)=e^x$,$g(x)=\sin ^{-1} x$ and $h(x)=f(g(x))$,then $\frac{h^{\prime}(x)}{h(x)}$ is equal to

The set $\{x \in R: \cos 2x + 2 \cos^2 x = 2\}$ is equal to