Proteins
Structural formulas of the amino acids appear at this site.
Question: On a piece of paper, draw the general structural formula shared by all amino acids. What type of bonds occur between amino acids to form proteins?

The Peptide Bond
Visualization of a peptide bond formed through dehydration synthesis is presented at this site.
Question: In your own words, describe the formation of a peptide bond.

Primary through Quaternary Structure
The levels of protein structure are discussed and nicely illustrated.
Question: What are the four structural levels of proteins?

Nucleic Acids
Diagrams of nucleotides and complementary base pairing in DNA are provided at this site.
Question: What does "complementary base pairing" mean?

Macromolecules
This is an excellent introduction to carbohydrates, nucleic acids, and proteins.
Question: On a piece of paper, match the monomer unit with the appropriate macromolecule:

1. Monosaccharide	A. Proteins
2. Nucleotide	B. Carbohydrates
3. Amino Acids	C. Nucleic Acid

Nucleic Acids
This site describes the structure of nucleic acids, the semiconservative nature of DNA synthesis, DNA repair, RNA synthesis, and the three major types of RNA.
Question: Why is the replication of DNA referred to as being semi-conservative?

Chemical Sciences: Biochemistry: Carbohydrates
Interesting information on carbohydrates is presented at this site. Monosaccharides, disaccharides, and polysaccharides are discussed.
Question: Name the four classes of compounds that are necessary for living organisms.