Chapter 2.3: Biological Molecules - Proteins

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This video is the third section of AS Level Biological Molecules. It focuses on proteins, the structure of amino acids and how they come together through a condensation reaction to form a peptide bond, the different structures of proteins, their functions and some examples. In this video, I also mention the importance of haemoglobin referring specifically to its structure of having two alpha and two beta globin polypeptides. Each polypeptide has a haem group. Each haem group binds to an iron atom and each iron atom binds to an oxygen molecule. Note that one oxygen molecule has two atoms of oxygen,
To end the video, I discuss collagen and its advantages.

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5 авг 2024

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Комментарии : 73

@ileninyirenda 2 года назад

“Side chain which we refer to as the side chick”😭😭😭😭😭>>>>

@mehekghanji8528 2 года назад

I am just new to ur channel and I just can't explain it. Its soo amazinggg and understandable. Thank u so much for using all ur efforts for us. May God bless u❤

@estheryniguez5575 Год назад

How does this only have 300 likes? It is so direct and informative.

@chrisleon27 Год назад

It's just too hard for average Joe to digest

@gulintheair5492 3 года назад

I love you. I hope that you will continue to do this.

@intanshfna4559 Год назад

i've been struggling to understand this sub-topic so much, but thanks to your video i can understand it clearly now ! once again, thankyouuu :)

@luciemagniant7471 2 года назад

Hi I just started ocr a level biology and I wanted to thank you for these videos, the clear structure and diagrams help so much to see before or after my lessons on it in class :)

@maryowos7226 4 месяца назад

You’re such a great Teacher. Thank you and God bless you.

@lalayla7975 2 года назад

there's a term sickle cells which is also in our hemoglobin topic it means that 1 amino acid on the surface of the beta pleated is replaced with a different amino acid the correct amino acid is glutamic acid which is polar and its substitute is valine which is non polar.i hope it's helpful.

@KH-jf8ps Год назад

Thank you. This topic is clearer now!🙏🏾

@ChristenasBlock 12 дней назад

Love this. I’m watching them all

@ruthdestinyongera7457 Год назад

Well explained and simple. God bless you doc

@tringamurseli8058 Год назад

I’ve never seen someone explain more perfectlyyy

@mahmoudamr256 26 дней назад

Your explaining is unimaginably Fabulous for me,and I love it ❤.Your follower is From Egypt✌️🇪🇬

@realkyraful 11 месяцев назад

You explain this so well thank you for posting all this information on RU-vid. My AP bio teacher is great but he explains too quickly or in short versions so I have to learn it for myself.

@lahorigirl_0673 Год назад

Very informative..jazakllah❤

@kelizadaka8844 Год назад

This was very good and straight to the point ❤️

@immaculatemphepo2062 Год назад

May God bless you more, you are such an incredible Teacher💥💫✨✊✍️👏👏👏👏

@munyaradzichinyani8267 Год назад

this channel is good its easy to understand biology ❤❤❤❤

@CoillardSethKunda 2 месяца назад

Thank you so much madam, please kindly provide us with some questions

@user-ky7dz3od3y 2 месяца назад

Thank you Ma'am for an informative lesson.❤

@caroljoy4308 9 месяцев назад

your lectures are superb and i have been watching your lectures from pakistan very helpful thank you

@rahulthomas3929 2 года назад

Thank you so much this was very helpful

@drac7431 Год назад

Very helpful 👍 Appreciated

@stephenedemasamuelkhalisto651 2 года назад

May God bless you for your time ❤️❤️❤️❤️❤️I love you so much

@khinphonekyaw2853 Год назад

This is a good teaching

@owaismemon9603 2 года назад

Good work miss,

@muhairwefaith4957 10 месяцев назад

Good one😊

@JjFavour 4 месяца назад

This class was so helpful ma’am

@aghagbondeborah7241 Год назад

Thank you so much ❤

@chantellechisuko6968 2 года назад

How is the structure of starch related to its function?

@beella2023 2 года назад

Hi guys At first thank you so much Dr. Second i wonder , if it's enough just watch these videos for IMAT axam or not ? Or (Do you have any advices to success in IMAT axam?:) )

@ultimateproductivity5141 Год назад

please keep making these vids

@klaxiqking Год назад

Thanks so much ma❤

@ssekajjalazaro1268 11 месяцев назад

Thank u so much

@user-vw9cl2bw5k 9 месяцев назад

How do a bovine insulin structure look like?

@ElezedChirwa 3 месяца назад

Well explained mamy

@ericmutuku-uu1jv Год назад

How R group contribute to the globular structure of protein

@NormenSojini-vy6gc 9 месяцев назад

Thanks

@joethecreeper8178 2 года назад

Dr demi , i have to ask one question The 4 bonds you have mentioned in the video (hydrogen.dysulfhide etc) are they always between the side chains of amino acid?

@biowithdrdemi 2 года назад

Yes, they are typically between the side chains and other parts of the amino acids

@oliviahaimbodi-js5nt Год назад

what are the elements found in haemoglobin ????????

@inayat8503 10 месяцев назад

Such a nice explanation❤❤thank you

@biowithdrdemi 10 месяцев назад

Glad it was helpful!

@honey0331 2 года назад

Hello, there. I am revising for my caies with your videos. thankyou so much for your hard work and dedication. One question, are we required to know all of the 20 amino acids

@biowithdrdemi 2 года назад

No you are not. You simply need to know the basic core structure of amino acids

@judeedits4298 2 года назад

Hello Dr.Demi, thank you for making these videos as you make the syllabus content very digestible. I would like to inquire whether you know of any qualified AS psychology teachers/tutors, including online syllabus resources for the subject. Best regards, and many thanks.

@biowithdrdemi 2 года назад

Hi Jude, I don't know of any teachers, but you van access some past papers using Papa Cambridge on this link pastpapers.papacambridge.com/?dir=Cambridge%20International%20Examinations%20(CIE)/AS%20and%20A%20Level/Psychology%20(9990) I would also suggest that you download the psychology syllabus from the CAIE website and read the learning outcomes for each chapter. You will typically be assessed based on the learning outcomes.

@judeedits4298 2 года назад

@@biowithdrdemi Hello Dr.Demi, i've previously dowloaded the syllabus and I have the course book for the subject. However, I'm searching for a tutor to assist me. Your efforts and prompt response are highly appreciated !

@tpwk9 Год назад

Hey try using Psych Boost

@jarareng 5 месяцев назад

thank you so much ! you are so talented at communicating and speaking. thank you again this helped me so much (my teacher isnt this good at explaining things LOL). :)))

@biowithdrdemi 4 месяца назад

Glad I could help!

@henetunoel5657 Год назад

I'm overwhelmed

@biowithdrdemi Год назад

Don't be. The channel has all that you need in easy-to-understand bits

@uzuirightarm Год назад

Love❤❤❤❤❤

@deffy343 Год назад

thank you so much for this video, i never actually understood this topic and i have an exam tomorrow, but you explained it so nicely and clearly. thank you so much Dr. Demilade!!

@evasciousmuzanarwo1930 2 года назад

WOWWWWWW SHE IS AMAZING 😆😆😆😆😆😆😆😆

@snemah 8 месяцев назад

Hello ma'am, I have a query, In the first slide you mentioned 'all enzymes are protein'. But ma'am, Ribozyme is a RNA enzyme and it's not a protein.

@biowithdrdemi 8 месяцев назад

Ribozyme is an exception to this rule.

@ivanbabu363 Год назад

Can you please give us the PowerPoint copy

@linakalilo735 2 года назад

Mrs how do I identified the different between Alpha and beta chains

@biowithdrdemi 2 года назад

The alpha helix is more tightly coiled. The beta sheet is like a zig-zag

@linakalilo735 2 года назад

@@biowithdrdemi okay mrs thanks may God bless you..

@akuawinnie8234 2 года назад

is this going by aqa ?

@taesmullet2178 2 года назад

no, it clearly says CIE

@salmanfarooqi5537 2 года назад

can you please provide notes of all chapters?

@avadf8127 2 года назад

notes are available on a website called save my exams

@uimagima7104 2 года назад

6:07 AMINO GROUP AND AMINE GROUPS IT IS THE SAME RIGHT ?

@biowithdrdemi 2 года назад

Yes, they are

@EunicekyerewaaOsei Месяц назад

Side chick 😂

@mebadinfluence 2 года назад

I think ALL enzymes are NOT proteins because ribozyme are RNA

@biowithdrdemi 2 года назад

I don't know what you mean by ribozymes but RNA is made of ribose sugar and nucleotides, amongst other things

@mebadinfluence 2 года назад

@@biowithdrdemi A ribozyme is a ribonucleic acid (RNA) enzyme that catalyzes a chemical reaction. The ribozyme catalyses specific reactions in a similar way to that of protein enzymes. Also called catalytic RNA, ribozymes are found in the ribosome where they join amino acids together to form protein chains.