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MABiology class. Mitosis explained #celldivision #mitosis #cells #division #animalcells #cellcycle #cytokinesis
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@mattgreen.jgm
#Replication
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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
248.9K
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
1.1K
ADop tradeable pet duplicator script showcase for adopt me! #adoptme #adoptmescript #updatedscript #delta #hacks #roblox #adoptmehacks #krnl #codex #fyp #adoptmescam
@adm.william
905.3K
ASBacteria vs Bacteriophage 👹😈
#reel #bacteria #bacteriophage #science #biology #destroy #earth #insects #attachment #injection #dna #replication #transcription #lysis #release #fy #facts #viralreels
@astrosphere0
24.6K
MEDNA replication is one of the most essential tasks of the human body. This animation by Nanographics (@nanographics.at) shows the molecular machinery which fills in the Okazaki fragments during the replication of the lagging strand.
Explore more work by Nanographics on the Medical Illustration & Animation Sourcebook online site. Link in bio.
#DNA #replication #genetics #medical #animation #medicalanimation #medicalanimators #3D #models #medicaleducation #scientificanimation #biology #molecularbiology #cellbiology
@medical.animation
370.6K
WOMitochondria are often called the “powerhouse” of the cell because they produce most of the cell’s supply of adenosine triphosphate (ATP), the main chemical energy source used by the body.
They also contain their own DNA and can replicate independently inside the cell, allowing them to adapt to the organism’s energy needs.
Follow for more ❤️
#mitochondria #viral #reels
@world_of_biology_wob
50.0K
ABQuiz: DNA Replication #genetics #biology #science #stem #dna
@abiologyteacher
13.1K
BITake a tour inside the cell with us✨✨
Can you identify the organelles ?
Comment their names in comment section..
..Follow us @bioscoolya
👉 For latest Biology news and research
👉 Learning new things daily
👉 Learn Biology in Fun way with us
#cell #cellbiology #molecularbiology #biotechnology #microbiology development usa india laboratory lab animation celldivision organelle ribosome nucleus chromosome genetics genome 3d devbio biologynotes fundamentalbiology science lifescience life animator nature naturephotography naturelovers
@bioscoolya
403.0K
SCDna replication
Dna is a molecule made up of two strands twisted around each other in a double helix shape. Each strand is made up of a sequence of four chemical bases, represented by letters A,C,G and T. The two strands are complementary. Each strand has a 5 prime end and a 3 prime end. The two strands run in opposite directions. This determinates how each strand of DNA is replicated.
DNA replication is described as a semi conservative because each DNA molecule is made up of one old conserved strand of DNA and one new one.
The first step in DNA replication is to separate the two strands. This unzipping is done by an enzyme called helicase and results in the formation of a replication fork. The separated strands each provide a template for creating a new strand of DNA.
An enzyme called primase starts the process. This enzyme makes a small piece of RNA called primer. This marks the starting point for the construction of the new strand of DNA. An enzyme called DNA polymerase binds to the primer and will make the new strand of DNA.
DNA polymerase can only add DNA bases in one direction from the 5 prime end to the 3 prime end. One of the new strands of DNA, the leading strand, is made continuously, the DNA polymerase adding bases one by one in the 5 prime to 3 prime direction. The other strand, the lagging strand, cannot be made in this continuous way because it runs in the opposite direction. The DNA polymerase can therefore only make this strand in a series of small chunks called OKAZAKI FRAGMENTS. Each fragment is started with RNA primer.
DNA polymerase then adds a short row of DNA bases in a 5 prime to 3 prime direction. The next primer is then added further down the lagging strand. Another Okazaki fragment is then made and the process is repeated again. Once the new DNA has been made, the enzyme exonuclease removes all the RNA primers from both strands of DNA. Another DNA polymerase enzyme then fills in the gaps that are left behind with DNA. Finally, the enzyme DNA ligaze seals up the fragments of DNA in both strands to form a continuous double strand.
Credit: @polymimestudio
Follow: @science.mm_
@science.mm_
75.2K
MR#DNA REPLICATION #review #school #biology #teacher @collegeboard 6.2
@mrssloanbiology
232.0K
RABiology quick revision 📚 series 💯
#reelsinstagram #examprepration #reelitfeelit
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✨ Guía de Descubrimiento #Replication
Instagram aloja 71K publicaciones bajo #Replication, creando uno de los ecosistemas visuales más vibrantes de la plataforma.
Descubre el contenido más reciente de #Replication sin iniciar sesión. Los reels más impresionantes bajo esta etiqueta, especialmente de @mattgreen.jgm, @biologyscienc and @astrosphere0, están ganando atención masiva.
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