Explain the role of enzymes in the extraction of DNA from Rhizopus in its purest form.

What is the role of coke in the extraction of iron from its oxide?

What is the role of coke in the extraction of iron from its oxides?

What is the role of limestone in the extraction of iron from its oxides?

Explain the role of the following in the extraction of metals from their ores : CO in the extraction of nickel.