Which of the following structures contains its own $DNA$?

Which hormone is primarily associated with cell division?

Which of the following molecules has a zero dipole moment?

The angle between the straight lines represented by $(x^2+y^2) \sin^2 \alpha = (x \cos \alpha - y \sin \alpha)^2$ is

Which of the following aqueous solutions will result in the maximum number of moles of metal deposited on passing the same amount of charge?

$A$ simple pendulum performs simple harmonic motion about $x=0$ with an amplitude '$a$' and time period '$T$'. The speed of the pendulum at $x=\frac{a}{2}$ is