Name the first transgenic cow. Which gene was introduced in this cow?

Milk produced by the transgenic cow 'Rosie' is enriched with which of the following?

Which of the following protein products has been used to treat emphysema?

The maximum number of existing transgenic animals is of which of the following?

Consider the following statements:
$I$. Transgenic animals are more sensitive to toxic substances than non-transgenic animals.
$II$. Useful biological products can be produced by introducing into transgenic animals the portion of $DNA$ which codes for a particular product.
$III$. Brazzein is a protein produced by a West African plant,$Pentadiplandra$ $brazzeana$,which is approximately $2000$ times as sweet as sugar.
Which of the statements given above are correct?

Which of the following is used for the safety testing of the polio vaccine?