MCQ
Ribozyme is
- A$RNA$ without sugar
- B$RNA$ without phosphate
- ✓$RNA$ having enzymic activity
- D$RNA$ with extra phosphate
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$II.$ The cell is treated with specific concentration of a divalent cation such as $... B...$ to increase pore size in cell wall
$III. $In $...C...$ method recombinant $DNA$ is directly injected into the nucleus of an animal cell
The most appropriate option regarding $\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$ is

$I$. There are many side effects of tubectomy and vasectomy
$II$. Purpose of tubectomy is to prevent egg formation
$III$. The most important component of the oral contraceptive pill is progesterone
$IV$. Contraceptive oral pills help in birth control by preventing ovulation