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Ionic and Covalent Bonds, Hydrogen Bonds, van der Waals - 4 types of Chemical Bonds in Biology

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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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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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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

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50 Comments

    Popular Comments:

umamaheswar gannavarapu . 2018-10-06
Super
121 2 . Reply
Alanna Bramer . 2018-09-30
I'm still a little confused about the Van der Waals Interactions, can someone please give an example?
121 2 . Reply
Rosilda . 2018-09-25
Gratitude for your are sharing your knowledge. Helped me a lot.
121 2 . Reply
praveen sharma . 2018-09-11
thanks a lot
121 2 . Reply
Summer AbuRahmeh . 2018-09-07
I was in tears trying to figure this out. Thank you!!!!!
121 2 . Reply
Ahmed Alzeer, . 2018-09-07
This video makes me feel like i wanna sleep
121 2 . Reply
SaR D . 2018-08-22
i have put in about 4 hours trying to understand this concept and finally this 8 minute video gave me my breakthrough. thanks!
121 2 . Reply
Tawny Hammett . 2018-08-17
I feel like I'm studying in a spa. This is amazing. Thank you!
121 2 . Reply
Malay Chatterjee . 2018-08-12
This video is definitely very good but I couldn't understand the Van der wall's forces, the other types of bonds are so nicely explained. Thank you madam.
121 2 . Reply
Rushda Khan . 2018-07-31
All type of bonds are used in making tertiary structure of proteins ..... Example , enzymes..
121 2 . Reply
Stuefe Boltzmann . 2018-07-24
like your voice! clams people down and explains very well. Could you also explain metallic bond? and the difference between primary bond and secondary bond? Is it the primary bond is stronger and secondary bond is weaker?
121 2 . Reply
Kalpana Sharma . 2018-07-23
Covalent bond and non covalent bonds
Covalent bonds are strong compared to non covalent bonds.eg Hcl.
121 2 . Reply
SevenDeMagnus . 2018-07-20
I wonder how these particles actually look like in person, if we could become as small as Ant-Man and see them with our own naked eyes. They must looks like planets orbiting the nucleus.
121 2 . Reply
SevenDeMagnus . 2018-07-05
I wished she was professor. With that voice and coolness, I'd learn better, relaxed (no to terror or weak teachers, though you tend to learn more sadly with terror teachers, lol but some are just right like Prof. Kimberly). God bless, Proverbs 31
121 2 . Reply
Hanhee Yang . 2018-07-04
great flower background with roses and purple flowers. accompanied with the calm but soothing voice, it sets up a perfect mood for those wanting to voice their talent through the wonderful SAT Chemistry subject test a brief place for comfort and relief. thank you
121 2 . Reply
Agni Herur . 2018-06-20
whats with this music this isn't the x files
121 2 . Reply
مفتاح مطول . 2018-05-24
I thought hydrogen bond is strong van der waal bond ; I mean they are the same
121 2 . Reply
Supendra Subba . 2018-04-26
ma'am till now we have learnt water is present everywhere but with different propertion. Eg. if we take dry soil in beaker or in any thing. And give heat with well covered. After a while we can see there droplets of water on the cover of beaker. N acc. to ur presentation biology and chemestry have different reaction and bonding property.Anyway, i just want to ask u a question and if possible please explain me later. My question is, in chemistry wont we used the water for reaction? N Only the crystals of compound are sufficient for reaction in chemistry?
I'm really getting confuse so please make a proper video in simple manner once again. So that each category(average, below average n intelligent) of students can understood well. Thank you.
121 2 . Reply
Heisenberg . 2018-04-20
Thank you so much.
121 2 . Reply
The life of Toolbox T . 2018-04-12
Please make more Biochemistry lessons like carbohydrates structures and stereochemistry, reactions of mpnosaccharides and important Oligosaccharides ... Ect
121 2 . Reply
Maya Sinha . 2018-02-21
This is just amazing.Sad to see that being so good it still has less no of views.Socratic rocks.
121 2 . Reply
Arthur Yancey . 2018-02-21
She is hot!
121 2 . Reply
Giovanni Duenas . 2018-02-11
Hydrogen bonds are used to connect strands of DNA.
121 2 . Reply
Dubstepfan 38 . 2018-01-25
ASMR
121 2 . Reply
Lori Marker . 2018-01-23
Can you explain stoichiometric for chemistry? Love the videos :)
121 2 . Reply
Dhia awad . 2018-01-21
that was so good. i was soooo confuse about these bonds. very professional explanation. l like the sound effect, helps to get the information faster.
121 2 . Reply
Natalia Sulbaran . 2017-12-10
keep uploading videos!! I'm learning so much. I have just finished my 1st year of med school and I'm going to apply physiology and biochemistry next semester. This channel is really useful for a warm up before the massacre (?
121 2 . Reply
Natalia Sulbaran . 2017-12-10
super excelente éste video!
121 2 . Reply
michael jordan . 2017-10-08
These videos are insane
121 2 . Reply
Naji Ould Es. Ahmed . 2017-10-05
My teacher said once, the Hydrogen is really a generous guy... and his only problem is that once you take what he would offer you, he will no longer leave you :)
121 2 . Reply
Existential Crisis . 2017-06-07
soothing voice;)
121 2 . Reply
lonedruid . 2017-05-01
There are some fuzzy bounds wich are neither covalent neither ionic, like the ones you find on rocks too, and this explains why rocks are brittle but resistant til it :333
121 2 . Reply
Xenogene Gray . 2017-05-01
1) Nonpolar covalent bonds, e.g. oxygen molecule
2) Polar covalent bonds, e.g. Hydrogen and Oxygen in same water molecule
3) Ionic bonds, e.g. NaCl
4) Hydrogen bonds, e.g. Hydrogen and Oxygen in different water molecules
5) Van der Waals force., e.g. between hydrocarbon molecules
Apparently if the force is with you, you don't bond too well, just like the Jedi :D
121 2 . Reply
srivatsan chandrasekaran . 2017-05-01
vandervalls force exists in graphite......pencil tip pantograph etc....!!!!!
121 2 . Reply
Ray Rocher . 2017-05-01
thanks for the chemistry course. chlorine is an interesting chemical prevents putrification.  thanks for study.
121 2 . Reply
Felipe S. Damasceno . 2017-04-30
I think the ionic bonds are in the bonds between a O2 molecule with hemoglobin iron molecule on the blood
121 2 . Reply
BElotti . 2017-04-30
Ionic bonds forms salt important to the climate of the planet, osmose and diffusion that are essential for life. Covalent bonds forms organic stuff that is everything that we eat as an example. Without the hydrogen bonds, plants wouldn't be capable of "sucking" water up to its upper parts like leaves, due cohesion. If I misspelled anything sorry I'm from Brazil :D about the last one I don't know.
121 2 . Reply
Mehmet Alihan Kayabas . 2017-04-30
I think ionic bonds are crucial in synaptic transmission (Ca2+ ion) , but I'm not sure ?
121 2 . Reply
conhecimento geral . 2017-04-30
posta em portugues disgrama
121 2 . Reply
Poliriboz . 2017-04-30
I think hydrogen bonds are used in DNA to connect nucleobases.
121 2 . Reply