#biochemistry
Bacteria Flagellar Motor #learnontiktok #intelligentdesign #evolution #molecular #nanomachine #learning #funfacts #biotok #science #stem #3danimation #atp #biochemistry #coolscience #simulation #atpsynthase #ATP #blender3d A cut-open E. coli slice simulated based on real structures and biology, every molecule you see is a real one: its shape was worked out atom by atom by scientists,using electron microscopes ,X-ray crystallography et al. Everything is drawn to true scale; only time is slowed, about 200×.The sound is not REAL though :) The yellow machine is the flagellar motor: a rotor about 50 nm across, driven by protons flowing through its stator units, turning the hook and filament at ~100 turns per second. Watch how the singal travel to falgelar motor. The teal structures at the lower right are the cell’s “nose” (chemoreceptor array): they sense what’s outside. When the "smell" (for example, nutrient molecules) changes, a protein at their base hands a chemical tag (phosphorylation) to a small messenger. The tagged messenger (orange, cheY) drifts across the cell and latches onto the bottom ring of the motor. When enough of them are attached, the ring flips — the flash is the switch — and the motor runs backwards. Backwards, the propellers fly apart and the cell tumbles; forwards again, it sets off in a new direction. That’s how a cell with no brain finds its way to food. Also in the picture: two more rotary machines (ATP synthase)at the upper left that make the cell’s fuel from the same ion current, a pump that throws out toxins, DNA being copied, a ribosome building a protein, and the three-layer wall with its sugar forest on the outside.
iJEP Studio1,200,000 次观看 • 1 个月前
DNA replication machinery #dna#satisfying #oddlysatisfying #learnontiktok #sciencetok #biotok#atp #polymerase ##simulation #coolscience #biochemistry By understanding the structure of DNA, scientists proposed—and later proved—that DNA serves as the template for copying genetic information. Using computer animation based on molecular research, we can now visualize how DNA replication takes place inside living cells. You’re looking at an assembly line of tiny molecular machines working together to duplicate DNA. The DNA double helix enters from the bottom left, where a molecular machine called helicase unwinds it into two separate strands. One strand is copied continuously, extending toward the right. The other strand is more complicated: because DNA can only be synthesized in one direction, it must be copied in short, separate segments. The strand forms loops that allow the replication machinery to coordinate the copying process. By the end, the original DNA molecule has been duplicated into two DNA molecules, each containing one original strand and one newly synthesized strand.
iJEP Studio597,700 次观看 • 1 个月前
DNA relication machinery #learnontiktok #atpsynthase #flagellum #biotok #funfacts #biology #nanomachine #learning #molecularbiology #coolscience #scienceanimation #molecularmotor #biochemistry #stem Every time a bacterium divides, it must copy more than four million letters of DNA with astonishing accuracy. Behind this feat is a molecular assembly line called the replisome. At the front is the helicase, a ring-shaped motor made of six subunits. Fueled by ATP, it races along the DNA, pulling apart the double helix and exposing two single strands. But exposed DNA is unstable. Single-strand binding proteins quickly coat the strands, keeping them separated and protecting them until they can be copied. Now comes the copying machinery: two DNA polymerases, one for each strand. Each polymerase grips the DNA through a sliding clamp, a molecular ring that keeps it attached while it adds thousands of new DNA letters. But there's a problem. DNA polymerases can only build in one direction: from 5′ to 3′. At the replication fork, that creates two very different jobs. The leading strand runs in the right direction, allowing its polymerase to follow the helicase and copy DNA continuously. The lagging strand faces the opposite direction. It must be copied in short, separate pieces called Okazaki fragments. First, primase lays down a short RNA primer, creating a starting point for DNA synthesis. Then comes the clamp loader. Powered by ATP, it opens a sliding clamp, positions it around the primer, and snaps it shut, ready for the next round of copying. The lagging-strand polymerase then grabs the new clamp and starts building an Okazaki fragment. As synthesis continues, the DNA template loops out, forming a remarkable trombone-like structure. Once the polymerase reaches the previous fragment, it releases the DNA and jumps to a freshly loaded clamp to start again. Flexible tau proteins connect both polymerases and the helicase to the clamp loader, coordinating the entire machine into one synchronized molecular factory. Together, they can copy roughly a thousand DNA letters every second. And accuracy is just as remarkable as speed. A proofreading subunit catches many incorrectly paired letters and removes them before they become permanent mistakes. Finally, the RNA primers are removed and replaced with DNA, and DNA ligase seals the remaining gaps, joining all the fragments into one continuous strand. Two complete DNA molecules, copied from one, ready for the next generation.
iJEP Studio91,400 次观看 • 7 天前
What sunlight actually hits inside a leaf #photosynthesis #chloroplast #molecularbiology #biochemistry #scienceanimation #learnontiktok #learning #funfacts #coolscience #simulation #nanomachine #biotok #science #3danimation From a leaf to the atoms that catch the light, in one continuous dive. Every molecule here is a real structure from crystallography and cryo-EM: photosystem II (the water-splitting machine), cytochrome b6f, photosystem I, and ATP synthase, the rotary motor that makes ATP. Red and blue photons land on the antenna, the energy hops chlorophyll to chlorophyll into P680, electrons flow across the membrane, and protons spin the rotor.#atpsynthase #ATP #atp
iJEP Studio270,000 次观看 • 26 天前
One tiny gene decided your sex.Every embryo starts with the same equipment: two sets of plumbing, and a gonad that could become a testis or an ovary. Around week six, one gene on the Y chromosome, SRY (Sex-determining Region Y), makes a protein that grabs the DNA and bends it. That kink switches on SOX9, which keeps itself on, and the gonad becomes a testis. Testosterone keeps one set of plumbing, and anti-Müllerian hormone dissolves the other. No SRY, and the ovary program wins. Copy SRY onto an X and you get an XX male; break the testosterone receptor and you get an XY female. It was never the Y. It’s one gene, one switch. #learnontiktok #learning #coolscience #biology #genetics #embryology #SRY #science #sciencetok #learnontiktok #chromosomes #DNA #protein #molecularbiology #stem #biotok #biochemistry
iJEP Studio44,200 次观看 • 19 天前
Watch hemoglobin grab oxygen, one at a time#learnontiktok #scienceanimation #coolscience Your blood is never blue 🩸 Veins only look blue because skin bounces blue light back while dark blood soaks up the red. The red is hemoglobin: 4 protein chains (2 α, 2 β), each holding a heme with an iron atom at its heart. When the first O₂ lands, the iron pulls on a histidine, a helix shifts… and the whole molecule rocks from the tense T state to the relaxed R state. Each oxygen makes the next one easier: that’s cooperativity. Fully loaded in the lungs, it lets go in your tissues. Carbon monoxide is deadly because it grabs those same irons and won’t let go.#biochemistry #learning #nanomachine #biology #science #molecularbiology #biochemistry #blood #oxygen #learnontiktok #scitok #animation #blender3d #protein #structuralbiology
iJEP Studio21,000 次观看 • 24 天前
A Day In The Life Of A LAB SCIENTIST 🩸🔬👩🏽🔬 Clinical Laboratory Scientists are trained to work in all departments of the lab. The majority of us will work as what we call "Generalists." The core Laboratory consists of Chemistry and Hematology, and may also encompass Coagulation, Urinalysis, and Blood Bank. Blood Bank and Microbiology are often their own departments but depending on the size of the facility, they may be included in the core lab where everyone rotates into those departments. SUBSCRIBE TO MY CHANNEL FOR MORE IN DEPTH CONTENT. Subscriber-only LIVES are focused on CLS students looking to effectively study for their exams! Join our lil community of NASTIES 😝😈🥼 📚🧪🧫🦠🔬 #healthcare #health #medicina #medicine #medtech #medtechstudent #medschool #medicalschool #medicaltiktok #medicalhumor #doctor #wellness #healthcareworker #microbiology #scienceexperiments #laboratory #laboratorio #urinarytractinfection #immunology #biology #chemistry #hematology #biochemistry #bacterialvaginosis #bv #yeast #stdawareness #microscope #microscopio #nurse #nursesoftiktok #doctorsoftiktok #learnontiktok #learning #learnfromme #teachersoftiktok
Marilyn | CLS, MLS(ASCP)194,200 次观看 • 1 年前
Hey my science geeks! 🧬 Peptides are short chains of amino acids linked together by peptide bonds. As the chain gets longer, its structure and function become more complex eventually forming proteins that help your body grow, repair tissues, transport molecules, and carry out countless essential functions. Save this post for your next biology, anatomy, or biochemistry study session! 📚 💬 Which science topic should I break down next? #ScienceTok #Biochemistry #Peptides #creatorsearchinsights #humananatomyclass
scienceandcoffee13,000 次观看 • 3 个月前
