There are four types of chemical bonds essential for life to exist: Ionic Bonds, Covalent Bonds, Hydrogen Bonds, and van der Waals interactions. We need all of these different kinds of bonds to play various roles in biochemical interactions.

These bonds vary in their strengths. In Chemistry, we think of Ionic Bonds and Covalent bonds as having an overlapping range of strengths. But remember, in biochemistry, everything is happening in the context of water. This means Ionic bonds tend to dissociate in water. Thus, we will think of these bonds in the following order (strongest to weakest): Covalent, Ionic, Hydrogen, and van der Waals. Also note that in Chemistry, the weakest bonds are more commonly referred to as “dispersion forces.”

Related Chemistry video:
Ionic Bonds vs Covalent Bonds
http://bit.ly/2cUG6C8

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.
10th edition Amazon Link: http://amzn.to/2mahQTi
11th edition Amazon Link: http://amzn.to/2m7xU6w
Amazon Used Textbooks - Save up to 90%
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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
http://amzn.to/2pLOddQ

Lab Girl by Hope Jahren
http://amzn.to/2oMolPg

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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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Creative Commons Picture Credits:
Salt crystals
https://en.wikipedia.org/wiki/File:Halit-Kristalle.jpg
Author: W.J. Pilsak

Hydrogen Bonding in water
https://en.wikipedia.org/wiki/File:3D_model_hydrogen_bonds_in_water.svg
Author: Qwerter

Products in this video:
Preparing for the Biology AP* Exam (School Edition) (Pearson Education Test Prep) - http://amzn.to/2qJVbxm

Cracking the AP Biology Exam, 2017 Edition: Proven Techniques to Help You Score a 5 (College Test Preparation) - http://amzn.to/2qB3NsZ

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