Advertisement Upgrade to remove ads


process by which plants and some other organisms use light energy to convert water and carbon dioxide into oxygen and high-energy carbohydrates such as sugars and starches


organisms that make their own food


dry coloring matter (especially an insoluble powder to be mixed with a liquid to produce paint etc)


any of a group of green pigments found in photosynthetic organisms


any of a class of highly unsaturated yellow to red pigments occurring in plants and animals


A flattened membrane sac inside the chloroplast, used to convert light energy into chemical energy.

Electron Transport Chain

A sequence of electron carrier molecules (membrane proteins) that shuttle electrons during the redox reactions that release energy used to make ATP.


electron carrier that provides high-energy electrons for photosynthesis

Carbon Dioxide Fixation

The transfer of carbon dioxide to organic compounds

Calvin Cycle

reactions of photosynthesis in which energy from ATP and NADPH is used to build high-energy compounds such as sugars


depending on free oxygen or air


living or active in the absence of free oxygen


a metabolic process that breaks down carbohydrates and sugars through a series of reactions to either pyruvic acid or lactic acid and release energy for the body in the form of ATP


electron carrier that stores energy used to make ATP


a chemical phenomenon in which an organic molecule splits into simpler substances


unit of heat defined as the quantity of heat required to raise the temperature of 1 gram of water by 1 degree centigrade at atmospheric pressure

Cellular Respiration

the metabolic processes whereby certain organisms obtain energy from organic moelcules


one of the carrier molecules that transfers high-energy electrons from chlorophyll to other molecules

ATP Synthase

large protein that uses energy from H+ ions to bind ADP and a phosphate group together to produce ATP


light-collecting units of the chloroplast


the supporting tissue of an organ (as opposed to parenchyma)


a nucleotide derived from adenosine that occurs in muscle tissue


an ester of adenosine that is converted to ATP for energy storage


electron carrier involved in glycolysis

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording