[Free Registration/Login may be required to access all resource tools.] Describes the significance of carbon to life on Earth.

Take an interactive quiz over organic compounds. After completing the quiz, check your score, and then revisit any incorrect question for further review.

This lesson will introduce the basic structure and function of a lipid. It is 2 of 3 in the series titled "Introduction to Lipids."

This lesson will introduce the basic structure and function of a lipid. It is 3 of 3 in the series titled "Introduction to Lipids."

This lesson will introduce the basic structure and function of a lipid. It is 1 of 3 in the series titled "Introduction to Lipids."

Take an interactive quiz over the molecules of life. After completing the quiz, check your score, and then revisit any incorrect question for further review.

The difference between the smooth and the rough endoplasmic reticula is described, as well as the functions of the smooth endoplasmic reticulum. These functions include the synthesis of carbohydrates and lipids, protein transport, and...

An explanation of the importance of fats and proteins in the human diet. Examples of chemical structures of various fats and proteins are used.

Take this interactive, multiple-choice quiz over the organic molecules important to life, then review your score and any missed questions at the end.

[Free Registration/Login may be required to access all resource tools.] Describes the structure and function of the plasma membrane.

Article looks at the structure and function of the different parts of the endomembrane system, how proteins, lipids, and vesicles are transported between these parts, and how this activity keeps the cell running smoothly.

This lesson will introduce phospholipids, and explain what their function is within a cell. It is 2 of 3 in the series titled "Lipids - Phospholipids."

This lesson will introduce phospholipids, and explain what their function is within a cell. It is 1 of 3 in the series titled "Lipids - Phospholipids."

This lesson will introduce phospholipids, and explain what their function is within a cell. It is 3 of 3 in the series titled "Lipids - Phospholipids."

This resource provides a detailed diagram of animal, bacterial and plant cells and viral structure. Also included are detailed drawings, with definitions, of each of the cellular organelles.

The fluid mosaic model provides an explanation of the structure of biological membranes. It explains why a membrane can perform all of its functions, e.g., permeability and adhesion. This resource describes the main components of a cell...