What are CHNOPS? These Chemical Elements = 98% of Life | Biology | Biochemistry

CHNOPS stands for Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus, and Sulfur. These six elements make up 98% of living matter on Earth! How does that help you? If you understand the chemical behavior of CHNOPS, you can understand almost all of biochemistry.

AP Hint! Every year, CHNOPS is the answer to a question on the Biology AP. :)

In this video, we’ll take a closer look at these key elements and discuss where you will see them in living things.

Jump to:

0:46 Carbon
1:51 Hydrogen
2:34 Nitrogen
3:04 Oxygen
3:36 Phosphorus
4:15 Sulfur
4:43 Calcium
5:16 Trace Elements

We challenge you to name a biological molecule made only of CHNOPS or a subset of these elements. Write your answer in the comments!

Our series on Biology is aimed at the first-year college level, including pre-med students. These videos should also be helpful for students in challenging high school biology courses. Perfect for preparing for the AP Biology exam or the Biology SAT. Also appropriate for advanced homeschoolers. You can also follow along if you are just curious, and would like to know more about this fascinating subject.

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Our current biology textbook recommendation is Campbell Biology from Pearson.
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For lighter reading, we recommend:
I Contain Multitudes: The Microbes Within Us and a Grander View of Life by Ed Yong
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Lab Girl by Hope Jahren
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Preparing for the Biology AP* Exam (School Edition) (Pearson Education Test Prep) - amzn.to/2qK1YHj

Cracking the AP Biology Exam, 2017 Edition: Proven Techniques to Help You Score a 5 (College Test Preparation) - amzn.to/2qBk6WC

Cracking the SAT Biology E/M Subject Test, 15th Edition (College Test Preparation) - amzn.to/2qJP6ko

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Directed by Michael Harrison
Written and Produced by Kimberly Hatch Harrison

About our instructor:
Kimberly Hatch Harrison received degrees in Biology and English Literature from Caltech before working in pharmaceuticals research, developing drugs for autoimmune disorders. She then continued her studies in Molecular Biology (focusing on Immunology and Neurobiology) at Princeton University, where she began teaching as a graduate student. Her success in teaching convinced her to leave the glamorous world of biology research and turn to teaching full-time, accepting a position at an exclusive prep school, where she taught biology and chemistry for eight years. She is now the head writer and producer of Socratica Studios.

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