MCQ
After ovulation the ovum is surrounded by a group of cells called :
- ✓Corona radiata
- BZona pellucida
- CGranulosa cells
- DTheca layer
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$I$. 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
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