Tough concepts made easy
3 min read


- Tough concepts extra-simplified for you.

Nucleic Acids: DNA and RNA

Many questions from this topic are asked in CBSE and NEET exams. The structure of nucleic acids and the differences between DNA and RNA can be a little tough to remember. Nucleic acids are polymeric molecules made up of carbon, hydrogen, oxygen, nitrogen and phosphorous. They determine inherent characteristics of living beings. These inherent characteristics are passed from one generation to the other without any change. The entities in nucleus of the cell that are responsible for the transmission of these characteristics are called chromosomes and are made up of proteins and nucleic acids.
There are mainly two types of nucleic acids, deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). They carry the genetic information in every organism. Watch Professor Dave explain nucleic acids in a simple, easy and fun way and master the topic in under 8 minutes!
Nucleic Acids: DNA and RNA
8 mins

Structure and Properties of Glucose

The structure and stereochemistry of glucose is quite difficult to remember. But it is important to remember it because glucose is the main repeating unit in many other disaccharides and polysaccharides like starch and glycogen. Learning the structure of glucose will also help you learn the structure of these polysaccharides better.
Glucose has an aldohexose structure. That means glucose molecule has one aldehydic group and remaining 5 carbons carry hydroxyl group. The six carbons in glucose form one straight chain. The aldohexose structure of glucose was established on the basis of chemical properties.
Let's get more clarity on this molecule through this video:
Class 12 Chemistry - Biomolecules | Glucose
6 mins


Most chemical reactions that take place in our body are with the help of biological catalysts, also known as enzymes. Every living being contains a thousand enzymes. These enzymes carry out critical functions in the body. For example, insulin is an enzyme secreted by pancreas. It controls blood sugar level. Enzyme amylase present in saliva hydrolyses starch.
Enzymes also have industrial applications. For instance, glucose isomerase is used in the conversion of glucose to fructose. Laundry detergents are manufactured using proteases. Here's a video that'll help you understand how enzymes work:
How Enzymes Work (from PDB-101)
5 mins