Internet Activities

Chapter 2: The Chemical Basis of Life

Internet Activities

The Periodic Table
This site provides information on the periodic table that includes the groups, periods, valences, electron shells, and characteristic trends.
Question: What are the characteristic trends of the periodic table?
The Learning Matters of Chemistry
These interactive chemistry exercises allow the user to visualize atomic orbitals. The 3-D animations are very helpful to the beginning chemistry student. Select "Computer Graphics".
Question: What is the maximum number of electrons that may occupy the "s" and "p" orbitals? Draw Bohr's model of a carbon atom on a piece of paper.
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?

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

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.

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