DNA Structure & Replication: Our Instruction Manual for Existing: Crash Course Biology #33

Your DNA contains all the instructions your body needs to function. In this episode of Crash Course Biology, we’ll figure out what this giant instruction manual looks like and how this three-billion-letter code gets copied into your trillions of cells through DNA replication.

Introduction: DNA & The Human Genome 00:00
The Structure of DNA 1:36
Chromosomes 3:51
DNA Replication 4:16
How DNA Replication Works 6:06
Mutations 7:51
The Okazakis 10:04
Review & Credits 11:23

[maximummax]

I have been watching Dr. Sammy religiously lately to remind my self of basic concepts I need for my exams. Your a life saver man

[LoganHolbrook-pphv]

I have a cellular bio test tomorrow and was still confused on DNA replication, but you guys came in clutch!!!!

[KelsieJG__they-them]

Every time I have to remember which pairs go together, I just remember the round letters go together (C and G) and the pointy letters go together (A and T).

[docjoe]

I often say DNA is like an expensive cookbook in the reference section of a library (the nucleus) and mRNA is like a photocopy you make of the pages you need.

This analogy would have been much more relevant 20-30 years ago!

[WCOBDisorder]

I literally just finished making an EdPuzzle for the older Crash Course on this topic!

[MrMetro-mtqv]

So now we see why Wolverine developed bone claws and a healing factor.

[isabelleminienpoule]

So well explained. Thanks Sammy and the whole team

[jonahsimmons]

Wow a lot of this I haven't read about in over a decade! This is only the second video I've watched so far but awesome videos!

[elius_robinc]

Lol just im learning English and now I step by step understanding that I need to learn a lot and a lot by your videos

[podcastwithpastorjesse]

Thank you so much! This video is exceptional. It's as entertaining as a movie and as educative as it needs to be.

[kayliegrace]

I just graduated from high school a few months ago and I still watch this sometimes and the funny thing is science was one of my least favorite subjects 😄

[Beryllahawk]

It IS incredible that life can work with a four letter alphabet, from two different angles - one being "only four." The other being "FOUR?!"
Because us humans created the entire Internet out of ones and zeroes. Binary can certainly function for lots of complex stuff! So having twice as many pairs to work with? It's double binary!
(I recognize that I am no doubt vastly oversimplifying here.)

[tamikovacs]

Such an interesting report, thank you

[theblackdeath]

Its always feels amazing to be the first in a Chanel that you really like 😂❤

[TheDanEdwards]

*Teleological language for science is a bad choice.* To declare (as in the video title) "Our Instruction Manual for Existing" raises the question: _Who is the Instructor?_ And then there are the ancillary questions such as what if one does not want to follow the instructions?

[KendraWeisbrodt]

Do you have videos on good stress vs. bad stress, resilience, and all forms of mental health promotion and prevention?

[TrynaDoMyBestHehe]

I think at 3:30 we can also make another mnemonic like remember it as G3 Cat2 (or just G Cat), G has 3 bonds with C and A has 2 bonds with T. Hope it helps.

[ramnextgen]

The music of Crash Course - is the same as the ringtone Seedling in iPhones, right? Are these based on any important western musical compositions? Thanks!

[luigiKnight]

Another piece of knowledge installed 🎉🎉🎉

[avokardoes]

Do you guys purposely use angel numbers to time your youtube video timings like 13:31, 13:13, 12:36, 12:34 and 11:11. Coincidence, marketing tactic or purposefully done for motivation? Love the videos!!