Chapter 2, Problem 3PIT

Summary Introduction

To explain:

The molecules that are necessary for life, apart from water.

Introduction:

Molecules are formed by atoms, i.e., one atom is chemically bonded with another atom to form molecules. Based on the sizes and shapes, molecules are classified into two types: micromolecules and macromolecules. Micromolecules are smaller in size and consist of low molecular weight, whereas macromolecules are larger in size and consist of high molecular weight. In addition to water, there are four major organic molecules are essential to life namely carbohydrates, proteins, nucleic acid, and lipids. Organic molecules are mostly occupied by carbon and hydrogen are called hydrocarbons. Large organic molecules are formed by polymerization of smaller units called monomers.