A review of the structure and function of biological macromolecules.

Online biology textbook discussing the chemical nature of water, and the importance of its molecular structure to life. Also discusses at length the organic molecules nucleic acids, proteins, lipids, and carbohydrates.

In this online biology textbook, learn about atoms and molecules as they relate to life. Find out about topics such as electrons and energy, chemical bonding, and chemical reactions.

Very good description of the process of translation with a good graphic to go along with it. Includes a chart classifying all of the RNA Codons.

This site touches on all the high points of chloroplasts. Includes pictures and diagrams, as well as links to more detailed information.

This is a good, in-depth reference for the study of macromolecules in biology - lipids, proteins and carbohydrates. Includes images and links to other sources as well as a quiz for students to check understanding.

This resource is an article about the cell membrane, and its role in water and solute movement in and out of the cell.

Find out about the process of transcription, where the DNA sequence of a gene is transcribed to make an RNA molecule.