As researchers draw nearer to the ability to design and grow new organisms from scratch, what planning and protections need to be in place to cope with the consequences?

This lesson will discuss the structure and function of both rough and smooth endoplasmic reticulum. It is 2 of 6 in the series titled "Endoplasmic Reticulum."

This lesson will describe how an enzyme is used to turn substrate into product. It is 1 of 5 in the series titled "Enzyme Function."

This lesson will describe that enzymes are made of proteins, and can be found in nature or can be synthesized synthetically. It is 1 of 4 in the series titled "Enzyme Structure."

This lesson will present the levels of organization of living things. It is 3 of 6 in the series titled "Levels of Organization."

Explains how DNA contains genetic material and how it is housed in chromosomes. This lesson is 3 of 5 in the series titled "DNA."

This lesson will describe how an enzyme is used to turn substrate into product. It is 5 of 5 in the series titled "Enzyme Function."

An instrumental tour through a cell. [3:09]

Researchers turned tiny water droplets into cooperating networks that can change shape and pass electrical signals.

Paul Andersen details the first 7 of 13 labs in the AP Biology Curriculum. The following topics are all covered: Artificial Selection, Hardy-Weinberg Equilibrium, Comparing DNA using BLAST, Diffusion and Osmosis, Photosynthesis,...

Paul Andersen explains the final 6 of 13 AP Biology Labs. The following topics are included: Transformation, Restriction Analysis of DNA, Energy Dynamics, Transpiration, Animal Behavior, and Enzyme Activity.

Paul Andersen explains how the Meselson-Stahl experiment was used to prove that DNA copied itself through a semi-conservative process. They grew E. coli in a medium containing heavy nitrogen (N-15). They then added the E. coli to a...

In this video, Paul Andersen defines water potential and explains how it can be calculated in a simple system. He explains how water can moved through osmosis and break down the two major parts of water potential (solute potential and...

Through the use of photos and videos, the different types of cell structure and function are examined in this colorful and informative site.