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GCSE Biology - What is DNA? (Structure and Function of DNA)

Cognito

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⭐️ https://www.cognito.org/ ⭐️

** WHAT'S COVERED **
1. The basic structure of DNA.
2. The components of a nucleotide.
Phosphate group.
Sugar molecule.
One of four bases: Adenine, Thymine, Cytosine, or Guanine.
3. The formation of the sugar-phosphate backbone.
4. Complementary base pairing.
5. The concept of the genetic code.
How the sequence of bases forms the code.
Definition of a gene.
6. How DNA codes for proteins.
7. Examples of protein functions.

** EXAM BOARD INFO **
AQA - Separate/triple science only
IGCSE Edexcel - Separate/triple science and higher tier only
Edexcel - Everything is relevant to your course!
OCR 21st Century - Separate/triple science and higher tier only
OCR Gateway - Separate/triple science only

** CHAPTERS **
0:00 Introduction to DNA Structure
0:54 DNA is a Polymer
1:06 Nucleotides: Phosphate, Sugar & Base
1:32 The Four Bases (A, T, C, G)
1:54 Sugar-Phosphate Backbone
2:38 Complementary Base Pairing (A-T, C-G)
4:12 Genes & The Genetic Code
4:52 How DNA Codes for Proteins
5:32 Protein Functions

** PLAYLISTS **
GCSE Maths (9-1)

GCSE Biology (9-1)

GCSE Chemistry (9-1)

GCSE Physics (9-1)

A-Level Biology

#GCSE #Biology #study #revision #school #exam #AQA #OCR #Edexcel #IGCSE #IB #AP

20 Comments

@stutiyilamp 4 years ago

To remember complementary bases, think of the letters made of straight lines (A-T) and curved lines separately (C-G).

@milktea6366 6 years ago

You’re literally so underrated

@seed11.11 1 year ago

explained it 10000x better than my teacher

@AyselRizwanNaqishbandi 2 days ago

The guy's aura! Bro explained in 6 minutes what takes a student 6 years of repetitive learning and sleepless nights to finally understand. Respect bro!

@jenan594 4 years ago

Wow. This is the only time I actually understood DNA. Thank you for your effort in these videos!

@pigpig9201 1 year ago

Was having a mental breakdown over DNA and you explained it in a way that nothing else I found could so thank you from the bottom of a sleep deprived student’s heart

@Sweji 1 year ago

The DNA is made from two strands that are wrapped around each other in this twisting shape that we call a double helix.

DNA is actually a polymer because it's made up of a lot of tiny little units called monomers with DNA we call each monomer a nucleotide and when we can see each one is actually made up of three different parts at the top we've got a phosphate which is connected to a sugar

@youknowme-f2s 1 year ago

2 hours of class sorted in 6 minutes 😅, thank you now I can focus on next topics

@madisonbate7250 2 years ago

You have no idea how incredibly helpful your videos are. I’ve gone from double award science to triple science for a level and needed to understand the triple science DNA from GCSE. I watched this video and made loads of note which allowed me to understand this within an hour. Thank you so so much. 😊

@ailaaam 2 years ago

guys also remember for edexcel they may ask you that the sugar phosphate backbone is connected through weak hydrogen bonds

@KaungSithuTun049 2 years ago

Six pages of explanation in six minutes

@nataliyachanna1083 2 years ago

You will be the reason i pass my biology exam tomorrow...✌️

@scarlettalexaaa 5 years ago

i was so confused by this to start with but now i understand it fully :) thankyou so much!

@srs21111 7 days ago

1:14 JUST THESE ILLUSTRATIONS MAKE SO MUCH SENSE YAYYYYYYYYYY

@sk0266 6 years ago

have you covered the entire gcse spec of aqa or do you still have gaps as i am going to go through all of them as they are really useful

@jaythejjam 1 year ago

Thank you so much for this video!! I know you posted this 5 years ago, but I've got my human bio extended response test tomorrow, and this video really helped me understand the dna structure topic a lot more!

@tanzela6366 5 years ago

your videos are sooo helpful, thanks :)

@aaisharahman9883 6 years ago

Never been this early to anything but I’m glad I did 😁

@kateyewaisis3656 3 years ago

I’m a freshman in high school you literally just saved my life thank you so much I was so confused you can really see the effort that you put into these videos❤❤❤