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.

Retrace the development of our knowledge of nucleic acids by viewing pictures of nucleic acids (both DNA and RNA) taken in 1952, 1973, 1979, 1980, 1984 and 2001.

Investigate the three-dimensional structure of different types of organic molecules.

An interactive activity where you can zoom in to explore the macromolecules present in organisms. Learn about proteins, carbohydrates, lipids, and nucleic acid as you investigate the molecular structure of these types of macromolecules....

[Free Registration/Login may be required to access all resource tools.] There is good evidence that life has probably existed on Earth for most of Earth's history. Fossils of blue-green algae found in Australia are the oldest fossils of...

Through informational text, interactive activities, animations, and video clips, students examine the chemistry of living things, and they learn how interactions from atoms are fundamental to life as we know it.

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

Find out how the human side of science played a role in the significant discovery of the molecule of life, DNA.

Take this interactive, multiple-choice quiz over the molecule of life, DNA. Then review your score and any missed questions at the end.

Try these five multiple-choice questions about the building blocks of life. The quiz is self-checking, and provides hints to the student if needed.

An investigation that is part of a series of lab lessons that expose students to Earth Systems through research, data, and visualizations. In this lab, students will follow the pathway of water on a big scale and a small scale down to...

This site is provided for by DNA Interactive. The genome is the entire endowment of genetic information. It is the "Book of life," on an organism. This site demonstrates the methods used to map and sequence the human genome and to...

[Free Registration/Login may be required to access all resource tools.] Carbohydrates, proteins, and lipids contain energy. When your body digests food, it breaks down the molecules of these nutrients. This releases the energy so your...

An introduction to the structure and function of the energy-rich molecules, carbohydrates.

This video/lesson series explains how the structure and behavior of H2O in liquid form gives water its properties, and make it a chemical essential for life. Also in this collection: a Victorian-era depiction of the water molecule; news...

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

This article describes the race to unlock the mystery of life by determining the double helix structure of the DNA molecule. The discovery of DNA and its structure is an example of collective learning.

[Free Registration/Login may be required to access all resource tools.] Chemical digestion could not take place without the help of digestive enzymes. An enzyme is a protein that speeds up chemical reactions in the body. Digestive...

[Free Registration/Login may be required to access all resource tools.] DNA is located in the nucleus. Proteins are made on ribosomes in the cytoplasm. Remember that information in a gene is converted into mRNA, which carries the...

[Free Registration/Login may be required to access all resource tools.] During active transport, molecules move from an area of low concentration to an area of high concentration. This is the opposite of diffusion, and these molecules...

[Free Registration/Login may be required to access all resource tools.] Covers the structure and properties of water.

[Free Registration/Login may be required to access all resource tools.] The process of molecules moving from an area where there are lots of molecules to an area where there are fewer molecules is known as diffusion. The diffusion of...

A lesson plan that introduces learners to the concept of classifying objects as either living or non-living. From this lesson, students begin to think about the necessary characteristics of life.

[Free Registration/Login may be required to access all resource tools.] The cell membrane is semi-permeable. Sometimes molecules need the help of special transport proteins or an input of energy to help them move across it. When an input...