Which of the following is responsible for mechanical support, enzyme transport and protein synthesis?

If a force $F$ is applied on a body and it moves with a velocity $v$,the power will be

What is the decreasing order of reactivity amongst the following compounds towards aromatic electrophilic substitution?
$(i)$ Chlorobenzene
$(ii)$ Benzene
$(iii)$ Anilinium chloride
$(iv)$ Toluene

Marchantia is an example of.

Which one of the following gases is liberated when ethyl alcohol is heated with methyl magnesium iodide?

An alloy of gold and copper crystallizes in a cubic lattice in which the gold atoms occupy the lattice points at the corners of the cube and copper atoms occupy the centers of each of the cube faces. Determine the formula of this compound.