• Acid
• Adenine
• Alkali
• Axle
• Base
• Base Pairs
• Beltdrive
• Bishop
• Command
• Cytosine
• Degree
• Deoxyribose
• Distribution of Force
• DNA
• Gear Ratio
• Gear Train
• Guanine
• Hydronium Ion
• Hydroxide Ion
• Indicator
• Input

• King
• Knight
• Lintel
• Nucleotide
• Output
• Pagoda
• Pawn
• Ph
• Post
• Power
• Process
• Program
• Queen
• Rook
• Shaft
• Solution
• Spur Gear
• Thymine
• Transfer
• Twisted Helix
• Work Formula

What is it?

Base pairs consist of two nucleotides that couple together (like the train above) to form the rungs of the twisted-ladder-shaped DNA molecule. Base pairs are made up of a pair of nucleotides that can chemically bond to each other.

However, not all nucleotides can bond with each other -- A (Adenine) will only bond with T (Thymine), and C (Cytosine) will only bond with G (Guanine). That means you can only have four possible base pairs:

AT TA CG or GC.

Give me an example!

Think of base pairs as best friends. You can only really have one best friend, right? A and T are "best friends," and will only bond with each other. Same goes for C and G.