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Homework Clinic
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At Homework Clinic, our #1 goal is to provide our audience with the best animations to explain the most difficult concepts in science and biology. Our videos are quick, precise, and are packed with information to help any student understand the material and pass their classes. Over at our website, we are a FREE homework helpline for anyone who signs-up. All posted questions are reviewed and answered by dedicated volunteers (students and teachers) from around the globe.
Replication of a Chromosome #dnareplication
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A eukaryotic chromosome contains a long, linear molecule of double-stranded DNA. This DNA is tightly coiled within the chromosome, but unravels during interphase, when DNA replication occurs. A eukaryotic chromosome contains multiple origins of replication.
At each origin of replication, DNA synthesis proceeds bidirectionally. Two replication forks move outward in opposite directions.
The replicating DNA helices from each origin elongate and eventually join each other.
The original chromosome has been replicated to form two identical daughter DNA molecules, also called sister chromatids.
A human cell spends an estimated eight hours replicating its DNA before dividing into two daughter cells. During this time, a thousand or more different origins of replication may open up to initiate the replication process. From the opening of each origin, two replication forks travel in opposite directions, adding nucleotides at an estimated rate of 50 base pairs per second. Bacteria replicate their DNA even faster, at rates in excess of 1,000 base pairs per second.
Despite these fast rates, DNA replication is surprisingly accurate. During the polymerization process, DNA polymerases proofread and correct virtually every mismatched nucleotide that they may incorporate into a new DNA strand. Other enzymes also contribute to the repair effort, ultimately leaving a cell with just one error in every billion new nucleotides. By investing energy in proofreading and repair mechanisms, cells protect the fidelity of their genetic information from one generation to the next.
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A eukaryotic chromosome contains a long, linear molecule of double-stranded DNA. This DNA is tightly coiled within the chromosome, but unravels during interphase, when DNA replication occurs. A eukaryotic chromosome contains multiple origins of replication.
At each origin of replication, DNA synthesis proceeds bidirectionally. Two replication forks move outward in opposite directions.
The replicating DNA helices from each origin elongate and eventually join each other.
The original chromosome has been replicated to form two identical daughter DNA molecules, also called sister chromatids.
A human cell spends an estimated eight hours replicating its DNA before dividing into two daughter cells. During this time, a thousand or more different origins of replication may open up to initiate the replication process. From the opening of each origin, two replication forks travel in opposite directions, adding nucleotides at an estimated rate of 50 base pairs per second. Bacteria replicate their DNA even faster, at rates in excess of 1,000 base pairs per second.
Despite these fast rates, DNA replication is surprisingly accurate. During the polymerization process, DNA polymerases proofread and correct virtually every mismatched nucleotide that they may incorporate into a new DNA strand. Other enzymes also contribute to the repair effort, ultimately leaving a cell with just one error in every billion new nucleotides. By investing energy in proofreading and repair mechanisms, cells protect the fidelity of their genetic information from one generation to the next.
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Відео
DNA Polymerization #dnareplication #molecularbiology
Переглядів 60День тому
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Hormonal Regulation of Calcium Animation #endocrine #BoneHealth
Переглядів 4014 днів тому
✔ HomeworkClinic.com ✔ Videos.HomeworkClinic.com ✔ Ask questions here: HomeworkClinic.com/Ask Follow us: ▶ Facebook: HomeworkClinic ▶ Review Us: trustpilot.com/review/homeworkclinic.com Calcium levels in the blood are regulated by three hormones: calcitonin, parathyroid hormone (PTH), and vitamin D. When calcium levels rise, the hormone calcitonin acts to reduce blood calcium. When...
The Global Carbon Cycle Animation #climatechange
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✔ HomeworkClinic.com ✔ Videos.HomeworkClinic.com ✔ Ask questions here: HomeworkClinic.com/Ask Follow us: ▶ Facebook: HomeworkClinic ▶ Review Us: trustpilot.com/review/homeworkclinic.com In the global carbon cycle, carbon is cycled through Earth's organisms, the soil, the atmosphere, and the oceans. Most of Earth's carbon is found in fossil fuels and in carbon-containing minerals i...
Airflow in Mammals Animation
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✔ HomeworkClinic.com ✔ Videos.HomeworkClinic.com ✔ Ask questions here: HomeworkClinic.com/Ask Follow us: ▶ Facebook: HomeworkClinic ▶ Review Us: trustpilot.com/review/homeworkclinic.com Airflow in the human respiratory system is tidal, meaning that air enters the lungs by the same route that it leaves. The route inward begins at the nasal passages (or mouth), passes through increas...
Life Cycle of a Frog Animation #amphibia
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✔ HomeworkClinic.com ✔ Videos.HomeworkClinic.com ✔ Ask questions here: HomeworkClinic.com/Ask Follow us: ▶ Facebook: HomeworkClinic ▶ Review Us: trustpilot.com/review/homeworkclinic.com Frogs, toads, salamanders, and caecilians all belong to the Amphibia. Amphibia translates to "double life"-a reference to the amphibian's life cycle, which occurs partly in water and partly on land....
Double Fertilization Animation
Переглядів 60Місяць тому
✔ HomeworkClinic.com ✔ Videos.HomeworkClinic.com ✔ Ask questions here: HomeworkClinic.com/Ask Follow us: ▶ Facebook: HomeworkClinic ▶ Review Us: trustpilot.com/review/homeworkclinic.com Flowering plants undergo an Xx unusual reproductive process in which there are two fertilization events, rather than just one. This double fertilization takes place between cells produced in the mal...
Macromolecules: Nucleic Acids and Proteins Animations
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✔ HomeworkClinic.com ✔ Videos.HomeworkClinic.com ✔ Ask questions here: HomeworkClinic.com/Ask Follow us: ▶ Facebook: HomeworkClinic ▶ Review Us: trustpilot.com/review/homeworkclinic.com DNA and RNA are nucleic X acids (polymers of nucleotides). Two polymers with complementary nucleotide sequences can pair with each other. This pairing endows nucleic acids with the ability to store,...
Classification systems Animation
Переглядів 29Місяць тому
✔ HomeworkClinic.com ✔ Videos.HomeworkClinic.com ✔ Ask questions here: HomeworkClinic.com/Ask Follow us: ▶ Facebook: HomeworkClinic ▶ Review Us: trustpilot.com/review/homeworkclinic.com The six kingdom classification system recognizes two prokaryotic kingdoms, the Bacteria and the Archaea. It divides the eukaryotes into four kingdoms: the protists, plants, fungi, and animals. Conse...
Life's diversity Animation
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✔ HomeworkClinic.com ✔ Videos.HomeworkClinic.com ✔ Ask questions here: HomeworkClinic.com/Ask Follow us: ▶ Facebook: HomeworkClinic ▶ Review Us: trustpilot.com/review/homeworkclinic.com Biologists make sense of diversity by classifying organisms into groups. Most now favor a system that assigns organisms to three domains: the archaea, bacteria, and eukarya. The eukarya includes the...
One way energy flow and materials cycling Animation
Переглядів 15Місяць тому
✔ HomeworkClinic.com ✔ Videos.HomeworkClinic.com ✔ Ask questions here: HomeworkClinic.com/Ask Follow us: ▶ Facebook: HomeworkClinic ▶ Review Us: trustpilot.com/review/homeworkclinic.com A one-way flow of energy through organisms and a cycling of materials among them organizes life in the biosphere. In nearly all cases, energy flow starts with energy from the sun. Solar energy is ca...
Building blocks of life Animation
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✔ HomeworkClinic.com ✔ Videos.HomeworkClinic.com ✔ Ask questions here: HomeworkClinic.com/Ask Follow us: ▶ Facebook: HomeworkClinic ▶ Review Us: trustpilot.com/review/homeworkclinic.com Examples of objects built from the same materials but with different assembly instructions. Consider a heap of ceramic tiles. By following instructions, you could arrange the tiles into any number o...
Noncyclic pathway of electron flow Animation
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✔ HomeworkClinic.com ✔ Videos.HomeworkClinic.com ✔ Ask questions here: HomeworkClinic.com/Ask Follow us: ▶ Facebook: HomeworkClinic ▶ Review Us: trustpilot.com/review/homeworkclinic.com How ATP and NADH form during photosynthesis in choroplasts. Embedded in a chloroplast's thylakoid membrane are many photosystems. Each is surrounded by an array of light-harvesting complexes. Pigmen...
Pairing of DNA fragments & Formation of recombinant DNA Animation
Переглядів 25Місяць тому
✔ HomeworkClinic.com ✔ Videos.HomeworkClinic.com ✔ Ask questions here: HomeworkClinic.com/Ask Follow us: ▶ Facebook: HomeworkClinic ▶ Review Us: trustpilot.com/review/homeworkclinic.com Restriction fragments from different sources can base-pair to form a recombinant DNA. Many restriction enzymes make staggered cuts and create fragments that have sticky ends. If fragments that have ...
Restriction enzymes Animation
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✔ HomeworkClinic.com ✔ Videos.HomeworkClinic.com ✔ Ask questions here: HomeworkClinic.com/Ask Follow us: ▶ Facebook: HomeworkClinic ▶ Review Us: trustpilot.com/review/homeworkclinic.com Eco RI, Hind Ill, and Bam HI are restriction enzymes derived from E. coli, Haemophilus, and Bacillus bacteria, respectively. Each enzyme recognizes a particular DNA sequence called a restriction sit...
Gene transfer using a Ti plasmid Animation
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Gene transfer using a Ti plasmid Animation
Prokaryotic fission and Prokaryotic conjugation Animation
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Prokaryotic fission and Prokaryotic conjugation Animation
Bacteriophage multiplication cycles Animation
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Bacteriophage multiplication cycles Animation
Temporal isolation among cicadas Animation
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Temporal isolation among cicadas Animation
Reproductive isolating mechanisms Animation
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Reproductive isolating mechanisms Animation
Disruptive selection among Butterfly/ African finches - Animation
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Disruptive selection among Butterfly/ African finches - Animation
How to find out if a population is evolving Animation
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How to find out if a population is evolving Animation
Allopatric speciation on an archipelago
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Allopatric speciation on an archipelago
Sources of genotype variation Animation
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Sources of genotype variation Animation
How many ATPs are required for one cycle of muscle relaxation and contraction? Plz answer 2 or 1?
thanks
thank youhhh soo much
Thank youu
This is a masterpiece
finally i know what is the leading and lagging strand =)))
Williams Frank Johnson Amy Martin John
Thank you ❤ It was very helpful ❤
This Disney show.......is not what I remember.
This is important to me, a person in Michigan who id dying from the heat. We're gonna be living ac to ac and in-between that relying on ways to keep cool, its just global warming
That lagging strand trips me up, I’m studying for the mcat and just reading the book is super confusing, great video representation of DNA replication. Thanks very much.
Good work
I had an accident which caused extracranial soft tissue swelling in the left frontal region with intracerebral hemorrhagic conclusion of the frontal lobe with subarachnoid hemorrhage with cerebral edema and also a fracture of the zygomatico maxillary complex and an infraorbital fracture. It's been 3 years since I lost my ability to smell, how is this related to the olfactory nerve?
These animations are great! The only thing that I wish is that the voice-over used a newer and clearer sounding text to speech.
Thanks
👍👍
first comment lol
Trudeau gotta go… he represents leftist woke Tranada 🏳️🌈 not the real Canada 🇨🇦…
Good ❤
Nice presentation ❤
But LH & FSH don’t both release estrogen
THANKS
Best video
8.1k views and no comments. Yet I am the first😂
i am second lol
Voiceover reminds me of Fallout 1/2
Best video Love from Peshawar..
thanks
For mdcat?
👍
thanks i sri lanka
Kon kon MOLECULAR BASIS OF INHERITANCE by VIPU SIR ke class se aaya hai 😀😀
😁😁
🦋🦋🦋
interesting 😐
Sir g which book used?
Nice Explanation
Thanks and welcome
In the video it appears to be two different DNA polymerase III, one for adding DNA nucleotides to the leading strand and the other for the lagging strand, but it's actually a single DNA polymerase III dimer that does the process in a coordinated way, isn't it? I was trying to understand this specific process. Thanks for the video anyway.
np
He beat Biden. At least Biden has an excuse. 83 with Dementia. But this guy in his early 50's is just plain stupidity at it's finest. No wonder his wife left him. Having to put up with nonsense spewing out of his mouth. My hat goes off to her. She is probably thinking, poor Canadians having to listen to this imbecile.
It is acted on by a digestive mixture called pancreatic juice . Pancreatic juice contains the protein digestive enzymes which is tripsin chymotrypsin and carboxypeptidase work together catalyze the breakdown if larger peptides into smaller ones by
But how effector Th cell can produce IL-2 when they can't recognize CMH1 when antigen is intracellular
effector T cells can produce IL-2 through indirect pathways, even when they don’t directly recognize MHC-I. This complexity ensures a robust and coordinated immune response against intracellular pathogens
👍👍👍
Clear explanation
thanks
Thanks Doktor What is the hormone responsible for the closure of growth centers in the human body?
human growth hormone (HGH). Produced by the anterior portion of the pituitary gland, HGH accelerates protein synthesis, particularly in skeletal muscle and bones.
@@homeworkclinic2119 You didn't answer correctly. HGH is not the hormone responsible for the CLOSURE of the growth plate. Actually, there isn't a "hormone" responsible for the closure of the growth plate. The growth plate closes by itself through ossification, once the rate of ossification and degenerescence of chondrocytes surpasses the regeneration of the proliferative layer. While there are factor that can cause the growth plate to close prematurely/sooner, there isn't a single hormone or mediator that is responsible for growth plate closure alone ; it closes naturally with time, and the age at which it closes depends on numerous factors, mainly genetics, but also environmental.
@@homeworkclinic2119 Also, GH exerces an influence on bone growth through somatomedin (IGF-1 mainly). Just saying that GH has anabolic effects doesn't explain how bone elongation works.
But I became famous because women have higher estrogen points for this number of heights only, but men have estrogen, but necessarily for this men Eli as well??????@@bertrand00956
@@bertrand00956ok I read that women's stock is higher than men's due to estrogen. Is this true?
This video is so good. Really underrated.
glad it helped you!
@@homeworkclinic2119 :)
Now this is awesome
glad it helped you!
Here’s a question I never could have imagined asking 5 minutes ago: how do you cool a squirrels hypothalamus?
During hibernation, arctic ground squirrels exhibit remarkable adaptations to survive extreme cold temperatures.
So how do you undo damage from Depakote causing reduction of basal temperature related to carnitine deficiency - IDC10 medical billing code E71.43, unchanged since 2007, taking carnitine halted the progression from 98.6 even when I got sick as a child, which was incredibly irritating at the time, all the way down to 95.6f, but when I started taking carnitine, stabilized at 97.4. That means that I can't lose weight the way I used to, and certain chemical interactions may not be working correctly because my health has taken damage. My doctors didn't catch this, I did, and they haven't been very useful except for one helping me get off Depakote safely. To not gain weight, I have to take nutritional supplements to get the same nutrients without getting more calories than I need, and convincing doctors of this isn't uphill battle. I just don't use the same calories, because I don't build as much heat. It also makes it very hard to get warm, under covers I just don't build the heat.
*promo sm*
Thanks for information video
glad it helped you!
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You save my genetic exam,thanks a lot!
glad it helped :)
Total idiot