MCQ
Ozone depletion is occurring due to:
- A$\text{PCB}$
- B$\text{CO}$
- C$\text{PAN}$
- ✓None of the above
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$I.$ improved varieties of the crops
$II.$ Agro-chemicals
$III.$ Better management practices
Choose the correct option.
$I$. Insulin for curing diabetes, used to be extracted from the pancreas of slaughtered pig and cattle
$II$. Animal insulin is slighty different from the human insulin
$III$. Animal insulin causes some undesirable side effects such as allergy
$IV$. Bacteria cannot be made to synthesise insulin from its gene because of the presence of introns
Choose the correct option