In DNA, thymine always pairs with ______.

🔑Key Points:
There are four nitrogen bases in a DNA-
Adenine
Guanine
Thymine
Cytosine
Adenine pairs with up Thymine
Guanine pairs up with Cytosine.

🔴Additional Information:
DNA stands for Deoxyribose Nucleic Acid.
It contains genetic information.
It is made up of
sugar group – deoxyribose sugar
phosphate group
nitrogen base – (Adenine, Guanine, Thymine, Cytosine)
Genetic information in DNA is wrapped up around a protein called Histones.

🛑Important Points:
RNA (Ribose Nucleic Acid) also has 4 nitrogenous base.
Adenine
Guanine
Cytosine
Uracil (instead of Thymine which is present in DNA)
RNA is single-stranded biopolymer. 
It is of 3 types-
mRNA (messenger)
tRNA (transfer)
rRNA (ribosomal)