Enzymes proofread DNA, reducing the error rate to one in one billion base pairs. Learn about the important process and so much more with the help of a presentation. It opens with the history of DNA and the major scientific contributions...

In this biology instructional activity, students complete 28 short answer questions on fungi. They color and label the different parts of a hyphae.

The experiment known as one of the most beautiful experiments in biology changed the way we think about DNA. Learn about the experiment and the scientists who designed it—as well as the scientists who built on the results—with an online...

A handout on genetic inheritance begins with a reading on alleles and how they can result in albinism. Junior geneticists learn to complete Punnett squares and participate in a coin toss simulation of allele pairing. They also learn...

Genetic variation shows the health of a population, yet cheetahs show very little variation over that last 10,000 years. Scholars learn the importance of genetic variation in populations after viewing an informative presentation. It...

Two multiple-choice quizzes, one on the processes and types of biological molecules, the other on the structure and replication of DNA.

Explore information about enzymes in the science of biology including what they do, how they work, and things that affect enzyme activity.

[Free Registration/Login Required] Interactive shows a graph illustrating the effect of pH on pepsin's reaction rate.

This lesson focuses on enzyme-catalysed reactions and the effect of temperature, substrate concentration, and pH on the reaction rate. It provides a link to an assessment.

Read a passage about sarin gas and its effects on the body and answer the follow-up questions.

Read the passage "Preventing Lipopolysaccharide Formation in Cystic Fibrosis Patients" and complete the five-question quiz.

Practice questions on how muscles rely on lactate dehydrogenase.