2. Chemical Bonding and Molecular Interactions; Lipids and Membranes

[@jacobmiller272]

MIT is doing a great job posting those lectures for ppl to study. Words couldn't describe how much I appreciate their generosity.

[@sasisarath8675]

Chemical Bonding and Molecular Interactions; Lipids and Membranes 1. Introduction ~ 0:01 2. The elements involved with life ~ 9:00 3. Functional Groups ~ 17:40 4. Non-Covalent Bonding ~ 26:44 1. Ionic Bond ~ 29:21 2. Hydrogen Bond ~ 31:09 3. Hydrophobic Interactions and Van der Waals forces ~ 35:32 5. Line-Angle Drawings ~ 37:53 6. Lipids ~ 38:53 1. Fatty acids ~ 41:44 2. Esters and Phosphoesters ~ 45:56

[@whatabouttheearth]

This should be at the top of the comments, almost is. Thank You friend!!!

[@scottcoston7832]

Thanks!!

[@efisgpr]

Here, you dropped this: 👑

[@meowwwww6350]

Long live the king

[@whatabouttheearth]

These teachers are chalk wizards! Thankfully this teacher doesn't teach like she's asleep like so many others. She has energy and that helps with learning

[@logenninefingers9332]

Thank you for the wonderful lectures. I majored in Biology 30 years ago, nice to have a refresher.

[@borisdorofeev5602]

She is very good at making this subject something that is interesting and enjoyable to learn. It's fascinating how well information is retained when it is fun to understand.

[@9B17]

I am actually learning English in this Biology class.

[@ingilizcevealmanca9789]

me too

[@hetaeramancer]

she speaks very British

[@alimayerlankyzy4549]

Me too

[@lavandeneth9965]

lol me too man but i learn kind of science too haha

[@aaryannisarta8174]

Nice one😂😂

[@racheldurie4016]

The way in which Dr. Imperiali explains things is amazing, her enthusiasm and knowledge is inspiring, makes the learning process so interesting and easy. Everything is so well explained. Great energy literally :) Thank MIT for sharing this!

[@julientorres4459]

with the proper background knowledge, I found myself having all the preliminaries to go forward with the chemical nature of life. I am incredibly grateful

[@seemathakur6228]

I mean mit is lit who gives free classes you guys are great.

[@eukaryotic0703]

Harvardx offer a free online course as well, if you like these then it would be worth cheking them out as well.

[@subhashreesahu56]

does IIT give free lectues?

[@think-physicskhargone7855]

@@subhashreesahu56 lots of them. Check NPTEL

[@whatabouttheearth]

Yale has free classes, at least on You Tube but I think that is also an online program lile these.

[@MBG_Broker]

Wow nothing less. This lecture really made the molecules of organic organisms come to life. It was down to earth and a really beautiful explanation about molecules in organisms. THANK YOU !

[@azmard4865]

How would IITs fare in comparison?

[@sderese]

Allow me to say that you are not only an amazing lecturer but also passionate

[@swapnadas7237]

Such a beautiful demonstration, A 9th grade student can also understand this easily, Thanks to MITOpenCourseware

[@azmard4865]

Are you saying these subjects easy for kids??

[@ecdetrick4560]

9 grade too here

[@scottcoston7832]

MIT has some great courses. If you are interested in mathematics, Gilbert Strang is a brilliant teacher. He was taught a course on Linear Algebra and a student ran through the lecture hall in an ape suit (must have been around the time of Halloween). He was took it all in stride.. made a pithy comment and continued with the lecture!

[@muhammadsiddiqui2244]

I am an Engineer in IT and AI. AI caused be to learn nueroscience and then in turn biology. I think you will find it amazing that a person who found it pride to NOT to learn biology is doing this course.

[@hirudo.clinic]

Thank you so much, its very impressive, the drive the interest an the dedication of the Instructor: Barbara Imperiali. I am listening to the lectures from Moscow Russia and its very engaging and educational as if you are present at MIT lecture. I am a HirudoTherapy practitioner and i love educating myself nowadays wherever whenever.

[@whatamidoinghere8893]

This is what I love about KZbin and other platforms. I can learn literally whatever I need whenever I need. I am only in high school but I feel that I can learn whatever I need or want with just a KZbin search

[@tanmayaadebta927]

I am very much interested in biochemistry and biotechnology and ur lectures help me a lot.Thank you

[@briangoswami3854]

Thank you MIT for these wonderful lectures

[@wohniamkotti]

How come this have so few likes? This is brilliant and explained very well. I wondered, how those lipid bilayers would form in nature, to get the "cell life" started. Then I got the answer that they self -assemble (when the necessary conditions are met, I assume). I consider the primordial soup a pretty interesting place. Especially the early days :-D

[@339059331]

Many thanks to all of Great MIT's Professors.

[@hallajianbiologychannel6835]

I really appreciate for these wounderful lectures❤❤❤

[@rrsandi7106]

I love this professor so much

[@susiesuuu3586]

These videos helped me soooo much! I just changed my major and really needed videos like these to help me out!

[@sung461]

What a refresher! This saved me

[@eukaryotic0703]

Very good lesson, doing a biochem course in september this is good prep thank you.

[@MrAgricoltura]

Thank you very much for these great and wonderful lessons

[@bkudrle]

Finally at age 69 this stuff is really making sense 😁

[@user-os4qh8eb2s]

agradezca enormemente que tenga subtitulos, el mundo realmente quiere que sea una buena profesional

[@shraddhavairagad6340]

Mind-blowing teaching

[@Omicronthewiperofyouknow...]

Here's something I've been experimenting with. The tongue and the nose bouth analyze taste. As far as I know at least, I am not an expert in the field. But they have different activation thresholds. So, if let's say I taste a very small amount of a substance, let's say a lemon, it is possible for one to get activated and the other not to get activated. If this happens, the brain recieves two different responses for the same stimulus. And in my personal experience, this acts like a drug. The brain gets confused and I get dizzy, cheerful, it depend on the substances. But all the substances I am talking about are food, not drugs. For example I squeez maybe 0.1 grams of lemon in a lidzen tea and when I drink it I feel like I am drunk. Something like that. In order to prepare the drink, I simply add very little lemon to the tea and smell it. I feel some sort of a sting in my nose and I imediatly start feeling the effects. I don't really know how this works exactly from a neuroligical perspective. I think of it like I said, two different inputs for the same stimuls and the brain gets in overdrive. I am curious if anyone tried experimenting with something like this. It's 100% legal, since it's about food, not drugs.

[@niazigooglegoogle3406]

I adore MIT academics

[@juan-tj1xf]

Oh my... I'm 27 majored in Computer science, my background is just high school chemistry, but this is beautiful... I should've majored in Biology

[@ashog1426]

My teacher is teaching good but i need another view on things these videos are a life saver

[@dani.afiiq_]

Thank you for rejuvenate my interest in chemistry

[@jeromenimer1612]

Just wow👏. Thank you for giving us access to these wonderful lectures😍

[@margaridapatrao6350]

I wish college professors in my country taught as well as this :'(

[@melophile6708]

seriously ..I'm also thinking same...I'm from India....what's your country ?

[@margaridapatrao6350]

@@melophile6708 Portugal 🙂

[@whatabouttheearth]

Well, this is MIT, it's a prestigious school. Then again I had science teachers this good at City College of San Francisco.

[@leogenn3379]

Perhaps that’s unfair to other colleges and universities? Professor Imperiali seems like one in a billion. You either get her, like MIT did, or you get some who’s just not for a world class superstar professor like she is.

[@escueladenivin-casma-peru1477]

Chemical bonding Is an outstanding ítem in Chemistry and Biology.

[@MonyjurAgenNul]

Amazing explain with prefect English

[@koningsbruggen]

Awesome lecture, thanks.

[@allenpvarghese578]

It's my dream to sit inside this class one day🥰🥰

[@melissarainchild]

How many layers of blackboard is there?

[@dannyannet154]

Thank you!

[@MikeStoneJapan]

This is great. I miss school. Wish I could go back b4 40 and really put my foot in it

[@pitankar]

Thank you. You help me reason better :)

[@lavandeneth9965]

her speaking is amazing

[@ThanhTriet600]

Biochemistry is so fascinating. I'm 28 and regret not going into it.

[@Abenigfilms]

Great refresher for a guaranteed A!

[@jhonrenaultrocios2745]

quarantine brings me here

[@StepsHardcore]

Thank you so much. Amazing lecture.

[@theo16s]

For my reference only 44:30

[@physicssarahnerd2567]

Sorry, about the hydrogen bonds, aren't they supposed between phosporus and hidrogen instead of sulphur and hidrogen?

[@GSU_Panther_Nation]

General chemistry (CHE 105) covers exactly that

[@HarishankarKumar-wl6nh]

Love from India 🇮🇳 ♥ ❤ 💕 💗 💖 mam ,very very thankful for this lacture mam.

[@moonsevinci88]

Thank you very much Dr

[@madansharma2700]

(A) Sulphur involved in hydrogen bone participant : that seems rare please give some examples. (B) wouldn't it be better to see Hydrogen bond as the biggest and the most important sub set of A-M+-B type of bond.

[@Yavanna16]

Is there an online resource/textbook that I can go through to understand these molecules and their interactions in a bit more detail? My chemistry is weak and I felt a bit lost. Any help would be greatly appreciated!

[@mitocw]

The required textbook for this course was: Sadava, D. E., D. M. Hillis, et al. Life: The Science of Biology. 11th ed. W. H. Freeman, 2016. ISBN: 9781319145446. For more info, visit the course on MIT OpenCourseWare at: ocw.mit.edu/7-016F18. Best wishes on your studies!

[@bailahie4235]

At 22:51, defining the reaction that forms amide, I think she forgets to add in the C (carbon) on the right hand side. The reaction is not balanced without it, even when assuming H2O as a by-product. Compare it with the slide she shows a few minutes later, there the C is indeed included. Can someone confirm?

[@louerleseigneur4532]

thanks mit

[@NoAcehere]

Anders Jonas Ångström was swedish 😀

[@erenylmaz9320]

📍15:45

[@lianengineer4970]

Can I have the slides? ^^ it would be great If I can take note during watching this video.

[@fredavastine2922]

You can easily pause the presentation and take notes that way

[@scottcoston7832]

why does she using the atomic particle proton, when electrons are the mechanism for bonding?

[@AndreaGar903]

Hello, do you guys know the book used to follow this course? Thank you! Best Andrea :)

[@mitocw]

The required textbook is: Sadava, D. E., D. M. Hillis, et al. Life: The Science of Biology. 11th ed. W. H. Freeman, 2016. ISBN: 9781319145446. See the course on MIT OpenCourseWare for more info and materials at: ocw.mit.edu/7-016F18. Best wishes on your studies!

[@CHROMIUMHEROmusic]

good lecture but didn't she mistake electrons for protons almost throughout? Bit confusing

[@yosernagme3204]

This is absolutely amazing ❤️, she make me feel that molecular component is more a life than me 👀 How I can found text book !

[@mitocw]

The required textbook is: Sadava, D. E., D. M. Hillis, et al. Life: The Science of Biology. 11th ed. W. H. Freeman, 2016. ISBN: 9781319145446. See the course for more information at: ocw.mit.edu/7-016F18. Best wishes on your studies!

[@irinabains4300]

amazing vid but could someone explain the hydrophobic interactions a little more pls, thanks :)

[@rasty0333]

Hi there , In my understanding point when we have a solution that contains water as its solvent and we also have Hydrophobics molecule ( for example inside cell we have protein and water ) , Hydrophobics substances ( some proteins) tend to combine with each other as they do they release water molecule ( due to Hydrophobic effect ) , and if we trying to fold protein to the shape which matches with its function our solvent is water so there will be certain too much (Ionic & Hydrogen)bonds which is unnecessary , so due to Hydroponic interaction we are trying to get ride of those unnecessariness ( and as a result we release water ) . Hope u get it

[@account1200000]

Does anyone know what textbook was used for this class?

[@mitocw]

The required textbook is: Sadava, D. E., D. M. Hillis, et al. Life: The Science of Biology. 11th ed. W. H. Freeman, 2016. ISBN: 9781319145446. See the course on MIT OpenCourseWare for more info and materials at: ocw.mit.edu/7-016F18. Best wishes on your studies!

[@kevincorrigan1754]

she said covalent bonds are 90-100 kcal/mol and that ionic bonds are 2-10 kcal/mol... i thought that covalent bonds were weaker than ionic bonds??

[@beingnurdin]

Covalent bonds are much stronger than Ionic bond. They are formed by equal contribution and sharing of electron in the outer energy level while Ionic bonds are formed by positive and negative charges btw anions and cations

[@kevincorrigan1754]

@@beingnurdin yea but ionic bonds physically take each others electrons and covalent bonds just share them.. are covalent bonds always stronger than ionic bonds or just sometimes?

[@jackiele5019]

I believe non covalent bonds involved more than just ionic bonds. "A non-covalent interaction differs from a covalent bond in that it does not involve the sharing of electrons, but rather involves more dispersed variations of electromagnetic interactions between molecules or within a molecule. "- Wiki

[@jackiele5019]

Also, as she mentioned, the aqueous environment made ionic bonds weaker than covalent bonds.

[@azmard4865]

@@beingnurdin tengkiu Nudin

[@alguienoalgo3561]

This made me realise I want to go back to studying . _.

[@UriValdez]

I understand none of this, will be taking biology soon and im nervous now😢😢

[@AM-kn5kr]

Just read the textbook and you'll be fine

[@rinc2006]

Some of the molecular biology videos by non MIT teachers are much easier in comprehending the concepts.

[@azmard4865]

@@rinc2006 salam. Are there any biology books published by the terrorists? Genuine question.

[@mattroberts4464]

✔

[@nathanieltyler4650]

Vampires closer than wolf's but both are working wrong marriage's.

[@nathanieltyler4650]

Who could have told you that.

[@j.r.Bambus]

16:22

[@lavandeneth9965]

please admin show me some books for chemistry to have a base for this

[@mitocw]

See the course on MIT OpenCourseWare for more info: ocw.mit.edu/courses/biology/7-016-introductory-biology-fall-2018/readings/. Best wishes on your studies!

[@scottcoston7832]

You can purchase the 10th edition for a few dollars. The eleventh edition will soon go down in price since 12th edition coming out soon. BTW, text is 1200 pages, so don’t buy 1 volume or you won’t be able to refer to material that appears later in the text. I found this out looking up an abbreviation in lecture 31;{

[@dasein1137]

Even a professor is 80% water

[@ZVIKAGREENBERG]

Hi Barbara imperiali - concerning your slide about LDL - please your comment about Dr Semantha Seneff a member of MIT who says that there is no real understanding of LDL. And actually it has a positive contribution.

[@burakguney2193]

Sir could you explain that issue

[@ZVIKAGREENBERG]

@@burakguney2193 That lady is an MIT researcher who is model simulating of compuerized biology and she says that all pro in this field are missing crucial knowledge. For instance she says that small amount of LDL is colloging the systems and makes a little heart attack intended to clean the and prevent a heart stroke.

[@ZVIKAGREENBERG]

@@burakguney2193 Dr Stephanie Seneff from MIT

[@ZVIKAGREENBERG]

@@burakguney2193 kzbin.info/www/bejne/g6K6qJudnNOVr9k

[@harishravishankar]

Flying photons of lecture 🍑

[@timmy18135]

39:10🎈

[@sternits]

Several misconceptions in her chemistry.

[@azmard4865]

She looks like a Karen.

[@sternits]

@@dohnjoe5401 I understand your point. I wish teachers didn’t do this. It is much harder for students to unlearn this wrong information than to spend a little time learning it right. Teachers underestimate students abilities to learn.

[@whatabouttheearth]

Why did you not state the misconceptions?

[@nathanieltyler4650]

How about a bonding marriage which is human and represent the humanity And it's department which deals with all matter

[@RandomAfrican-qh6vk]

Nah hell nah this was difficult for me, this has to be some advanced ... I mean is this not biology ? what are doing here ?

[@oiajwoadgea6123]

theres something wrong in the first 5 seconds lmao. Adenine is a nitro base and not a nucleotide or a nucleoside.

[@nathanieltyler4650]

How about how you determine them all.

[@luansavage2055]

Why are they still using Chalk in 2018? Driving me crazy

[@9B17]

Luan Savage why drive you crazy? What’s wrong with the chalk?

[@luansavage2055]

9B17- if you paid the very high tuition for the college- and they had chalk for a tool. I’d want my $$ back too. This isn’t 1990.

[@vasdgod]

They use stupid ppts which helps you to imagine creatively

[@deshbhaktnationalist1441]

@@vasdgod what ppts

[@Sjohnson1217]

Physically writing out notes on the board is a method of getting information to stick better. Juxtaposed to a lecture where a professor just flips through ppt slides, it’s more interactive.

[@NnnHyyu]

Overrated