Khan Academy: Gel Electrophoresis

This introduction to gel electrophoresis demonstrates how it's used to separate DNA fragments or other macromolecules. [11:00]

Read a passage about gel electrophoresis and answer the follow-up questions.

Introduction to gel electrophoresis and how it's used to separate DNA fragments or other macromolecules. [10:59]

Test your knowledge of various biotechnologies.

An overview of what biotechnology is including DNA technology. Also explore ethical questions in biotechnology.

Watch this tutorial, which serves as an introduction to PCR (polymerase chain reaction). [9:54]

A technique used to amplify, or make many copies of, a specific target region of DNA.

Learn how the sequence of nucleotide bases (As, Ts, Cs, and Gs) in a piece of DNA is determined.