DNA Structure | DNA Function | Cell Biology | Part 1

#DNA #DNAstructure #Deoxyribonucleicacacid #Nucleotides #Thymine #Adenine #Cytosine #Guanine #CellBiology #apbiology
DNA Structure | DNA Function | Cell Biology | Part 1
Like this video?
Sign up now on our website at www.DrNajeebLectures.com to access 800+ Exclusive videos on Basic Medical Sciences & Clinical Medicine. These are premium videos (NOT FROM KZbin). All these videos come with English subtitles & download options. Sign up now! Get Lifetime Access for a one-time payment of $45 ONLY!
Sign up now on our website at members.drnajeeblectures.com/
---------------------------------------------------------------------------------------------------------------------------
Why sign up for premium membership? Here's why!
Membership Features for premium website members.
1. More than 800+ Medical Lectures.
2. Basic Medical Sciences & Clinical Medicine.
3. Mobile-friendly interface with android and iOS apps.
4. English subtitles and new videos every week.
5. Download option for offline video playback.
6. Fanatic customer support and that's 24/7.
7. Fast video playback option to learn faster.
8. Trusted by over 2M+ students in 190 countries.
---------------------------------------------------------------------------------------------------------------------------
▬▬▬▬▬▬▬▬▬▬ Contents of this video ▬▬▬▬▬▬▬▬▬▬
DNA Structure and Function. (DNA) is a molecule composed of two polynucleotide chains that coil around each other to form a double helix carrying genetic instructions for the development, functioning, growth and reproduction of all known organisms and many viruses. DNA and ribonucleic acid (RNA) are nucleic acids. Alongside proteins, lipids and complex carbohydrates (polysaccharides), nucleic acids are one of the four major types of macromolecules that are essential for all known forms of life.
Join us on KZbin get access to 800+ Exclusive Videos:
/ @doctornajeeb
Or Sign up on our website at www.DrNajeebLectures.com
The two DNA strands are known as polynucleotides as they are composed of simpler monomeric units called nucleotides. Each nucleotide is composed of one of four nitrogen-containing nucleobases (cytosine [C], guanine [G], adenine [A] or thymine [T]), a sugar called deoxyribose, and a phosphate group. The nucleotides are joined to one another in a chain by covalent bonds (known as the phospho-diester linkage) between the sugar of one nucleotide and the phosphate of the next, resulting in an alternating sugar-phosphate backbone. The nitrogenous bases of the two separate polynucleotide strands are bound together, according to base pairing rules (A with T and C with G), with hydrogen bonds to make double-stranded DNA. The complementary nitrogenous bases are divided into two groups, pyrimidines and purines. In DNA, the pyrimidines are thymine and cytosine; the purines are adenine and guanine.
Both strands of double-stranded DNA store the same biological information. This information is replicated as and when the two strands separate. A large part of DNA (more than 98% for humans) is non-coding, meaning that these sections do not serve as patterns for protein sequences. The two strands of DNA run in opposite directions to each other and are thus antiparallel. Attached to each sugar is one of four types of nucleobases (informally, bases). It is the sequence of these four nucleobases along the backbone that encodes genetic information. RNA strands are created using DNA strands as a template in a process called transcription, where DNA bases are exchanged for their corresponding bases except in the case of thymine (T), for which RNA substitutes uracil (U). Under the genetic code, these RNA strands specify the sequence of amino acids within proteins in a process called translation.
Within eukaryotic cells, DNA is organized into long structures called chromosomes. Before typical cell division, these chromosomes are duplicated in the process of DNA replication, providing a complete set of chromosomes for each daughter cell. Eukaryotic organisms (animals, plants, fungi and protists) store most of their DNA inside the cell nucleus as nuclear DNA, and some in the mitochondria as mitochondrial DNA or in chloroplasts as chloroplast DNA.
---------------------------------------------------------------------------------------------------------------------------
Join this channel to get access to the perks:
Sign up now on our website at members.drnajeeblectures.com/
Follow us on Facebook:- / drnajeeb
Follow us on Instagram:- / drnajeeblectures

[@DoctorNajeeb]

Join us on KZbin get access to 800+ Exclusive Videos: kzbin.info/door/PHpx55tgrbm8FrYYCflAHwjoin Or Sign up on our website at www.DrNajeebLectures.com

[@namitabepari1337]

Thank you sir

[@biology958]

kindly make a video on light reaction of photosynthesis

[@rehanabokhari4482]

Very good I like ur explanation

[@IjazKhan-yv9qk]

Till my last breath i will not forget your help for us to understand the medicle concept Thanks once again 👍❤️ 🇵🇰

[@kunwarabdulkalam2841]

I'm doing final year of bachelor bachelor of pharmacy . Ur lecture is so amazing and very helpful for me. I like your way of teaching explanation in very simple English language.

[@munaaliii]

Really clear and concise explanations given by Dr. Najeeb - The legend. This was a lif up for me, to assure me that I could stay friends with his lectures throughout my med school years hopefully.

[@mirkamrann]

Energetic Sir with excellence.. Legend of the Medicine.. Sir includes all the basic topics necessary for an MBBS student. Sir, we love your way of teaching.❤️❤️❤️

[@DoctorNajeeb]

Stay blessed. 🙏💕

[@mirkamrann]

@@DoctorNajeeb جزاك الله خير

[@Nizar_organics]

Dr. Najeed when I watch your vedios I always feel blessed with best 🥰 You are my ideal one Lots of love from India 😍

[@leighannealvarado7377]

Sir, in this time of advancement in technologies, in this time where almost very educators clamor for the importance of these technological gadgets to keep up to the interest and inclination to learn by this generation of learners, sir you are proving them wrong somehow! Because you, yourself as the educator/professor, are the best instructional material to your students...I am learning a lot from you...technologies cant outshine the best educators! Stay healthy sir.

[@DoctorNajeeb]

Thank you for your love and support.

[@kaleemullhamujawar4212]

Because of him i m now graduated ❤❤❤

[@DoctorNajeeb]

Wishing you the best of luck for your ongoing education and career.

[@kiran-yw8yo]

@@DoctorNajeeb hello sir me doctor ki tayari kar na chahata hu per muje English language nahi aati to me kaya karu please muje kuch idea do 😭

[@unisuccessfulutuber6099]

@@kiran-yw8yo no problem, english seeko, it is easy to learn... english bahut sulab aur aavashyak hai. All the best

[@mahendratripathi4811]

I am 13 years 8th std Sir explain so nicely that anybody can understand

[@johnmohddr4889]

Sir wallah i don't have words to appreciate you simply you are God given gift may Allah subhanawatallah bless you always

[@sheerazchoudhary7650]

I from Kashmir India from last many years I am watching your lectures. Almighty bless you for your efforts.

[@DoctorNajeeb]

Thanks Alot stay blessed

[@UsamaKhan-qg2se]

You are my Ideal one..♥️ Lots of love ♥️♥️♥️ Love ♥️ your way of teaching.

[@Bklogy.brainbow]

We will always be thankful to you ;For all the hard work and efforts that you have put in to educate us 🙏

[@prateekmaheshwari5279]

Befor see this I hd no idea about dna and its functions. Thnks for giving me this beautiful lecture...

[@DoctorNajeeb]

Glad to hear that. Stay blessed.

[@zulekhahairstyle4523]

The way you teach are simply awesome icant put into words how much ur videos helped me in clearing my poor basics... Love from kashmir... May Allah reward you for this.. Keep shining

[@DoctorNajeeb]

Jazak Allahu Khairan! ❤️

[@itsrajpoot8535]

You are just making our life easy JazakAllah sir.

[@waleedabdullah8121]

such a great and outclass personality

[@zainabzareen2056]

Your lecture method is very nice

[@user-jr6ez4wu7h]

Dr najeeb you are luctuer very amazing l thank you so so much l'm from Yemen

[@DoctorNajeeb]

Glad you liked it. Thank you for your love and support.

[@vijaygote6921]

Sach me sir aap ossm hai aap jaise teacher zindagi me mile to life set hai❤️❤️❤️❤️❤️

[@anishapradhan5747]

Thank you Sir for your easy and amazing explanation. Really helped me in class 12 exams. Lots of love from India.

[@DoctorNajeeb]

Glad you found my lectures meaningful and easy to understand. Thank you so much for all the love! ❤️

[@knowourislam7387]

Thankyou so much sir.. I am from India preparing for master's in plant breeding genetics... You cleared my concepts jazaakAllah Khairan😊

[@DoctorNajeeb]

You are most welcome. Keep watching❤️

[@sohrabkhan4517]

Just because of you I feel that mbbs is not tough❤❤❤

[@redrose6465]

Best and important vedio for me

[@girlpower7329]

Lots of love and respect from India 🙏🏼💜

[@bakhtnama8325]

Thank you sir. Your lectures are very helpful.

[@Kabir_Khayer]

East or west Dr Najeeb sir is the best.। U are so good teacher.।। Your pronaunce is so good.

[@UsamaKhan-qg2se]

Lots of love ♥️ From Bajaur Pakistan

[@diptanusaha5887]

Sir, I am a student of Human Physiology, Msc There is no career option in India after Msc in Human Physiology except school teaching. I just want to thank you for all your lectures that helps me alot to pass and secure good number in exam

[@sharifullahkhan1575]

Excellent method of teaching in the world 🌎🌍.thank you

[@fazalkarim4388]

بہت عظیم انسان ہو

[@sadiabano9116]

New here. I have realized that You are not less than a blessing. Stay blessed always sir .One of the best teacher.

[@DoctorNajeeb]

Thank you so much my beloved student that really mean a lot to me. Stay Blessed ❤️ ❤️ ❤️

[@kassemmagtary9299]

Thank you very much.

[@jabracirro3022]

Masha allah, you are fantastic doctor, i am from Somalia 🇸🇴

[@DoctorNajeeb]

Thank you for your love and support❤ Keep supporting ❤

[@MuhammadUsman-op5us]

Sir I CANNOT EXPRESS HOW BLESSED I AM TO LEARN FROM YOU THIS HAS REALLY MADE MY LIFE EASY AND ITS BLESSING WHEN YOU UNDERSTAND EHAT YOU ARE BEING TOLD.. MAY ALLAH GRANT YOUR SON HIGHEST PLACES IN JANNET UL FIRDOUS AND GIVE YOU SABARR AND SEVAAB🤲

[@DoctorNajeeb]

Ameen. ❤️

[@agriculturist3448]

Muhammad Usman what happened to his son 🥺😔😔

[@MuhammadUsman-op5us]

@@agriculturist3448 He died 2 or 3 months ago 😔

[@gokulapriyaganeshan7133]

Excellent teaching sir. Your teaching temptates me to learn still more. Thank you sir. Respect from Tamilnadu, India sir..

[@vaishalisingh1154]

Crystal clear concept with Dr. Najeeb... ❤❤ Thank you so much sir ...😊😊

[@DoctorNajeeb]

You are welcome dear ❤️ Stay blessed ❤️

[@shamsayed3176]

Deep explaination mashallah

[@rahilinamul]

You are great Sir.

[@DominicFloresLouis-ej6bt]

Watching live from 🇸🇸, your videos are so educative ❤

[@jayantibhagat8149]

Very nice lecture sir . Thnku because of you my concepts are clear

[@naumanali9077]

I'm student of International relations and it's not even part of my major but I love to learn so here I'm.

[@munaaliii]

is khan ur third name hahahaahhhha Nauman Ali Khan

[@naumanali9077]

@@munaaliii Hahaha no i don't have any third name it's only Nauman Ali. I'm Punjabi by birth so yeah there is no khan.

[@MUSTHAHEENATHRAFEEQ-lh2wx]

I am just a nurse my daughter is studing for medicine now i can teach her and can clear her doubt only because of you sir .thanks you sir May allah bless you abundently

[@pashupatchakraborty5243]

Thank you Sir, for this extremely helpful video.

[@DoctorNajeeb]

Glad it was helpful! :)

[@beautyofnature4280]

Lots of love from gujrat.. 💖

[@maqboolahmad6117]

One of the best teacher in the world

[@Draftabiqbal744]

Thank you Dr.Najeeb for your help Thanks a lot Sir

[@DoctorNajeeb]

You are welcome. Stay blessed.

[@rahi007biologytomicrobiolo5]

Good topic Excellent sir

[@piyushkrishnankrishna5485]

Its grateful to watch najeeb sir's lecture ❤❤🙏🙏

[@DoctorNajeeb]

That’s so nice of you. Students like you keep me going. More power to you. ❤️🔥

[@benevolent7599]

Humble gratitude from Indonesia

[@mayamathew6207]

Sir, you r a great lecturer. May God bless you abundantly.

[@DoctorNajeeb]

Thank you for your kind words❤️

[@Ahtesham581]

Thank u sir for crystal and clear concepts ❤

[@khandawar2947]

Best teacher in the world

[@mbbsknowledge5696]

Great job

[@samiullahkhan5554]

Thank you sir

[@vikram_bhardwaj0777]

Good sir you explain well♥️♥️

[@shohruhbekmirabijonov]

Thank you

[@hinaqureshi8387]

Thankyou sir for sharing your knowledge with us and also thanks for clearing our concepts over different subjects you are such a blessing for medical students

[@DoctorNajeeb]

Thank you for your love and support❤️ Stay blessed ❤️

[@sylvianmesoma6153]

Doctor Najeeb you're just the best Sometimes I think I've lost everything but the way you explain ur topics to us here in KZbin make me know that I still know more Thanks a lot Dr Najeeb 🙏🙏😍😍

[@DoctorNajeeb]

Thank you for your love! keep supporting❤️

[@sylvianmesoma6153]

@@DoctorNajeeb Please how can I join ur live classes

[@muhammadatif924]

I already watch this my dear sir

[@DoctorNajeeb]

Thank you for your love and support!

[@IjazKhan-yv9qk]

ASSALAMUALAIKUm Allah bless you

[@imadyousufzai2998]

Millions of thanks for the crystal clear lecture Sir❤❤❤❤❤❤

[@DoctorNajeeb]

You're most welcome

[@m.khuzaifakhan3450]

I chkout Dr Najeeb wiki , I'm glad to see that u r from Pakistan ,,best lectures ever ..😍❤️

[@DoctorNajeeb]

Thank you so much for the kind words! 💕

[@abdussamad644]

Tank you sir

[@DDkdev]

Ur one the excellent teacher .... thank you so much for wonderful lesson sir

[@DoctorNajeeb]

You're welcome! 💖

[@mahigamer3728]

You're just a living legend, sir!

[@DoctorNajeeb]

Thank you so much for the appreciation! Stay blessed ❤️

[@asrasultana8125]

Exacelant lecture sir so simple and clear concept

[@m.khuzaifakhan3450]

Best lectures ever ,agr aesa teacher mil jae bndy ko to kya hi baat h 😍🥰

[@DoctorNajeeb]

So nice of you. Keep supporting ❤️

[@manzoorkhan5420]

Sir you Are core of my heart

[@DoctorNajeeb]

That's such an amazing compliment! Thank you so much for your love and support. ❤️ ❤️ ❤️

[@bhatnoorelahie6793]

I really enjoy watching your video lectures even I'm not medical student but i desperately love to watch them like when you watch your favorite movie or anything else. I had dream 😴💭to become medical doctor, I couldn't make. I just have a dream to attend live class of yours. Thank you sir I getting a lot of inspiration from you. From kashmir india.

[@DoctorNajeeb]

Thank you for your love and support. Stay blessed and best of luck.

[@sabi1808]

Thank u sir for crystal clear class,thank u ❤

[@DoctorNajeeb]

Most welcome❤️ Keep supporting❤️

[@parnabiroy3095]

Thank you sir...sir you explain in such a way...it get sets in mind for life long....

[@DoctorNajeeb]

You're most welcome! ❤️

[@hasnaabdullathief647]

Thank you sir , your my role model 🥰

[@DoctorNajeeb]

It's my pleasure to have such great students like you. Stay blessed ❤️

[@dr.omarjibrilabdimohamed8332]

I m from somalia.... You are teaching us alot @drnajib Thank you

[@DoctorNajeeb]

Thank you so much for your love and support❤️

[@Alihassan-ub7ej]

Concept clear...thanks dear sir

[@DoctorNajeeb]

You are welcome❤ Stay blessed ❤

[@UsamaKhan-qg2se]

Allah bless you more and more.. 🤲

[@akanshasharma1643]

Love & lot of respect from India❤💜

[@shaistahkhan3920]

I am lost for words to praise uh thanks a ton sir for so easy n amazing explaination.....ur vay of teachingg .....👌👌👌👌👌

[@DoctorNajeeb]

Thank you for all the love and support❤️

[@adeelbasra8388]

Lots of love from narowal Pakistan.....

[@hannanabbasi8651]

Brilliant lecture brilliant sir as always!

[@DoctorNajeeb]

Glad you liked it❤

[@abubakarkhan9132]

Thanks A lot Sir For So Easy And Amazing Explanation It's Very Helpful For Us Have No Words To Thanks You.

[@DoctorNajeeb]

Happy to help. Stay tuned ❤️❤️

[@top10knowledge60]

Thank you sir...😊

[@DoctorNajeeb]

🙏💕

[@2_mry19]

I am so happy to find your channel your explanation is wonderful Thank you so much❤

[@DoctorNajeeb]

You are welcome❤

[@HellenaMwansa-ef2pm]

Very helpful thank you ✨

[@DoctorNajeeb]

You are welcome❤ Stay blessed ❤

[@noorjahanjaganath2582]

Beautifully explained

[@DoctorNajeeb]

Thank you so much 💖 Stay blessed 💖

[@jaboralievabdulfattohhamza9050]

Dr. Najeeb I am from Tajikistan. Always wath your lessons they are very beautiful.

[@DoctorNajeeb]

Thank you for your love and support. Stay blessed.

[@tahirkhankhan1817]

Very well explain

[@DoctorNajeeb]

Happy you liked it

[@samirtimsina8262]

You are great sir..I topped Medical exam because of you

[@DoctorNajeeb]

Congratulations. Thank you for your love and support.

[@samirtimsina8262]

Thank you so much sir

[@yousufshohag521]

Love and respect for An Artist of medical science,from Bangladesh

[@DoctorNajeeb]

Thankyou for your love and respect. Stay blessed ❤️

[@Singwithme497]

Hats off to sir Very nyc concepts

[@DoctorNajeeb]

Thanks for the love and support ❤️

[@pubgtdmking3385]

Sir u r the best in the world

[@DoctorNajeeb]

Thank you for all the love and support dear💖 Keep supporting 💖

[@dnareplication5593]

thank you thank you thank you so much 💯🖐️ sir

[@DoctorNajeeb]

Most welcome ❤️ Thank you for your love and support ❤️

[@faatimomohamedalimohamedal7010]

Best lecture Dr👍

[@DoctorNajeeb]

Thanks a lot.

[@colors7559]

Sir pranam 🙏 Gifted teacher for me sent by God 🙏 Thank you so much you tube thank you so much Dr Nazeeb sir , for every lines of yr lecture ,for every points it's cleared pured like water 💦 India🇮🇳🇮🇳🇮🇳🇮🇳🇮🇳🇮🇳🇮🇳🇮🇳🇮🇳🎂🎂

[@DoctorNajeeb]

Glad to hear that❤️ Thank you for all the love and support❤️

[@ranjanmallik5291]

🙏🙏🙏🙏🙏 I have a dream.. is to worship you physically once💜💜💜🧡🧡🧡🤍🤍🤍💛💛💛 .Now .I Persuing my PG degree in Physiology & ofcourse You Are My One And only Teacher 🙏🙏🙏..... (From INDIA...)

[@nitikathakur3482]

Sir u are god of immunology microbiology cell biology etc❤️🙏

[@DoctorNajeeb]

Thank you for your love and support! ❤️

[@travelwithpaalii007]

We love dr najeeb love from India

[@DoctorNajeeb]

Thank you for all the love and support❤ Keep supporting❤

[@user-eg7cj5cu7m]

I thought that you have very speacial talent to deliver your knowledge and GOd has choosen you for us❤

[@DoctorNajeeb]

thank you

[@randomvideos3838]

Good Work Sir

[@DoctorNajeeb]

Thank you for your love and support.

[@user-eg7cj5cu7m]

After your lec. books are easily understandable for me.. thank you sir... ❤🎉

[@DoctorNajeeb]

Glad to hear that

[@maqboolahmad6117]

Love you sir