Biological molecules are big

• They can contain hundreds, or thousands, or millions of atoms

• But they're all made of smaller pieces linked together

What Are Biological Molecules Made Of?

Monomer - A small molecule that joins together to form a larger molecule

• Every biological molecule is made from monomers bonded together

• Every biological molecule has its own type of monomer

Monomers

Biological Molecules and Their Monomers

Proteins are made of a long chain of amino acids that are bonded together

• There are only twenty amino acids
  

Proteins and Amino Acids

The Twenty Amino Acids

Carbohydrates are made of sugars that are bonded together

• Each hexagon in the picture is one sugar molecule

Carbohydrates and Sugars

Lipids are made of fatty acids that are bonded together

Lipids and Fatty Acids

Nucleic Acids are made of nucleotides that are bonded together

• There are five nucleotides

Nucleic Acids and Nucleotides

• Adenine (A)

• Uracil (U)

• Guanine (G)

• Cytosine (C)

RNA

• Adenine (A)

• Thymine (T)

• Guanine (G)

• Cytosine (C)

DNA

The Five Nucleotides