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MEDNA #medical
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#Dna Helicase Function
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MA✨MAQUETA DE ADN✨
¿Qué es que es el ADN?
Molécula del interior de las células que contiene la información genética responsable del desarrollo y el funcionamiento de un organismo
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@manualidades.yulii
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BIHelicase💪😂🧬 (function of DNA helicase is to separate two strands of DNA for replication.
Helicase is the enzyme, which unzips the DNA strands by breaking the hydrogen bonds between them. Thus, it helps in the formation of the replication fork.)
@biotech.symposium
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THEven Hydrogen bonds can’t resist Helicase
@theodininc
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EDDNA isn’t just a chapter…
it’s your body’s entire blueprint 🧬
Understand this once →
and half of molecular biology becomes easy
Save this before revision 📌
Get your FREE study PDF from the link in BIO 📚 🙌🏻 ♥️
@edutales_learning_center
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Which part of DNA confuses you the most? 🧬
@edutales_learning_center
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BI💬 Comment “DNA” to get notes on DNA Replication! 🧬✨
Ready? Let’s make replication feel like a fun mission, not a boring chapter 😄👇
🧠 DNA Replication = The cell’s “copy & backup” before division ✅
So both new cells get the same genetic instructions 📚🧬
⸻
🚪 1) Start Point: Origin of Replication 📍
Replication begins at specific spots called origins → DNA opens up from here 🔓
🌀 2) Unzipping the Helix
🧩 Helicase = the zipper opener 😮💨➡️
It breaks hydrogen bonds & creates a replication fork 🍴
🛡️ SSB Proteins hold strands apart like clips 🧷 so they don’t re-join!
⸻
🧱 3) Primer Setup (Because polymerase needs a start!)
🛠️ Primase lays down a tiny RNA primer 🧷
Think of it as the “start button” ▶️
⸻
🏗️ 4) Building New DNA (5’ → 3’ only!)
👷 DNA Polymerase adds nucleotides using base-pair rules:
🔸 A ↔ T 💞
🔸 C ↔ G 🤝
⚡ Leading strand = smooth continuous build 🛣️
🐢 Lagging strand = built in pieces (Okazaki fragments) 🧩🧩🧩
⸻
🧼 5) Clean-up + Joining
🧹 Primers removed & replaced with DNA 🔁
🧷 DNA Ligase = the glue gun 🔫✨
It seals Okazaki fragments into one continuous strand 🧬✅
⸻
🎯 Final Result (Super important!)
✅ Two identical DNA molecules
Each one = 1 old strand + 1 new strand 🧬♻️
That’s Semi-Conservative Replication 💡
🧠💬 Quick quiz (comment answers!) 😄
1️⃣ Which enzyme “unzips” DNA? 🔓
2️⃣ Which enzyme “glues” fragments? 🧷
3️⃣ DNA is built in which direction? ➡️
🎥 by yourgenome(yt)
@biotechnologyguy
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BI🧬 Editing life at its source — precision meets biotechnology.
Watch how CRISPR rewrites DNA, opening doors to curing genetic diseases and shaping the future of medicine.#Biotechnology #CRISPR #GeneEditing #DNA #Genetics MolecularBiology BioTechRevolution ScienceReels MedicalScience FutureOfMedicine GenomeEditing LifeSciences ScienceVisuals BioInnovation Research ScienceContent STEM ReelsIndia LearnScience
@bioverse.initiative
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YADNA replication explained!!
Chlo jaldi se apne doston se share kar do
#NEET2025 #neet #neetbiology #neetaspirant #neetmotivation #neetreels #biologyforneet #studywi̇thme #studentlife #neettricks #ncertbiology #ncert #bioinseconds #yashikamampw #neet
@yashika_singh_tandon
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BIOne of the most fascinating process in biology.
DNA replication is the biological process by which a cell makes an exact copy of its DNA before cell division. It's essential for growth, repair, and reproduction in all living organisms.
Key Steps in DNA Replication
1. Initiation
- Begins at specific sites called origins of replication.
- Helicase enzyme unwinds the double helix, forming a replication bubble with two replication forks.
- Single-strand binding proteins (SSBs) stabilize the unwound strands.
2. Primer Synthesis
- Primase lays down short RNA primers on each strand to provide a starting point for DNA synthesis.
3. Elongation
- DNA polymerase III adds new nucleotides.
- One strand (the leading strand) is synthesized continuously.
- The other (the lagging strand) is synthesized in short fragments called Okazaki fragments, which are later joined by DNA ligase.
4. Termination
- Once the entire DNA molecule is copied, enzymes remove the RNA primers and replace them with DNA.
- DNA ligase seals any gaps, completing the replication process.
📹 by yourgenome (yt)
#molecularbiology #molecularmedicine #cellmolecularbiology #microbiology
Direction of replication is...
@biologyscienc
1.4M
APDNA Replication is the new Cupid Shuffle with @3dmoleculardesigns 😍
Biology teachers! If you don’t already have this kit, I absolutely love it for modeling Gene Expression. From Replication to Transcription to Translation… it has it all plus worksheets to support student learning
#apbio #apbiology #biology #apbioteacher #teacher #modeling #dnareplication #scienceteacher
@apbiopenguins
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LEDNA replication is a vital, semi-conservative process where each new DNA molecule retains one parental strand and one newly synthesized strand, as proven by the Meselson-Stahl experiment. Replication starts at origins of replication—single in prokaryotes (e.g., OriC in E. coli) and multiple in eukaryotes. Helicase unwinds the DNA, while single-strand binding proteins prevent reannealing.
Primase lays down an RNA primer, allowing DNA polymerase to extend new DNA strands in the 5’→3’ direction. The leading strand is synthesized continuously, while the lagging strand forms Okazaki fragments, later joined by DNA ligase after primer removal. Topoisomerases relieve supercoiling, and proofreading ensures replication accuracy.
Animation credit 📸- Thanks to "Your genome " Official Youtube Channel ♥️
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Link to watch original Video 👇
https://youtu.be/TNKWgcFPHqw?si=0ziJsI27CXmrrCdK
.
#dnareplication #dna
@learn_medicall
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WOHelicase is an essential enzyme during DNA replication. It performs the function of unzipping the double-stranded DNA so that each strand can serve as a template for replication.
Step-by-step Process:
1. Binding to the Origin of Replication:
Helicase binds to specific regions on DNA called origins of replication, where replication begins.
2. Breaking Hydrogen Bonds:
Helicase moves along the DNA molecule and breaks the hydrogen bonds between complementary base pairs (A-T and G-C), separating the two strands.
3. Creating the Replication Fork:
This unwinding forms a Y-shaped structure called the replication fork, where the DNA is split into two strands — a leading strand and a lagging strand.
4. Energy Requirement:
The unwinding process requires energy in the form of ATP, which helicase hydrolyzes to move and function.
5. Assistance from Other Proteins:
Single-Stranded Binding Proteins (SSBs) stabilize the unwound strands.
Topoisomerase relieves the tension ahead of the fork caused by helicase activity.
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#dnahelicase #Biotechnology #science #medical
@world_of_biology_wob
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