Production of value-added products like nutrition supplements,pharmaceuticals,fuels,etc.,using transgenic crops is called:

What are some of the characteristics of $Bt$ cotton?

$RNA$ interference involves silencing of specific mRNA due to a complementary . . . . . . molecule that binds to and prevents translation of the mRNA.

$A$ - $A$ crop expressing a $cry$ gene is usually resistant to a group of insects.
$R$ - $Cry$ proteins produced from $Bacillus$ $thuringiensis$ are toxic to the larvae of certain insects.

$Bacillus \text{ } thuringiensis$ forms protein crystals which contain insecticidal protein. This protein

Gene expression can be controlled with the help of $RNA$. Explain the method with an example.