1. Write a brief essay on any ONE of these amines:
Sildenafil (popularly known as “Viagra”)
2. Write a brief essay about any FIVE carbon allotropes of your choice.
Heme, or haem (spelling differences) is a substance precursive to hemoglobin, which is necessary to bind oxygen in the blood stream.
Heme is biosynthesized in both the bone marrow and the liver.
Graphite (/ˈɡræfaɪt/), archaically referred to as plumbago, is a crystalline form of the element carbon with its atoms arranged in a hexagonal structure. It occurs naturally in this form and is the most stable form of carbon under standard conditions. Under high pressures and temperatures it converts to diamond.