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Explanation of the structure of DNA ... DNA nucleotide base triplet ...
video lang: en
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Added:9 months ago
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ADN / DNA DNA, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organisms. Nearly ...
ADN / DNA
DNA, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organisms. Nearly every cell in a person's body has the same DNA. Most DNA is located in the cell nucleus (where it is called nuclear DNA), but a small amount of DNA can also be found in the mitochondria (where it is called mitochondrial DNA or mtDNA).
The information in DNA is stored as a code made up of four chemical bases: adenine (A), guanine (G), cytosine (C), and thymine (T). Human DNA consists of about 3 billion bases, and more than 99 percent of those bases are the same in all people. The order, or sequence, of these bases determines the information available for building and maintaining an organism, similar to the way in which letters of the alphabet appear in a certain order to form words and sentences.
DNA bases pair up with each other, A with T and C with G, to form units called base pairs. Each base is also attached to a sugar molecule and a phosphate molecule. Together, a base, sugar, and phosphate are called a nucleotide. Nucleotides are arranged in two long strands that form a spiral called a double helix. The structure of the double helix is somewhat like a ladder, with the base pairs forming the ladder's rungs and the sugar and phosphate molecules forming the vertical sidepieces of the ladder.
An important property of DNA is that it can replicate, or make copies of itself. Each strand of DNA in the double helix can serve as a pattern for duplicating the sequence of bases. This is critical when cells divide because each new cell needs to have an exact copy of the DNA present in the old cell.
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Dr. Michael Rosenbaum discusses the nutritional properties and benefits of Sun Chlorella. Specifically chlorophyll ...
Dr. Michael Rosenbaum discusses the nutritional properties and benefits of Sun Chlorella. Specifically chlorophyll, protein and nucleic acids.
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Added:1 year ago
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It is a nucleic acid that contains the genetic instructions used in the development and functioning of all known living ...
It is a nucleic acid that contains the genetic instructions used in the development and functioning of all known living organisms and some viruses. The main role of DNA molecules is the long-term storage of information. DNA is often compared to a set of blueprints or a recipe, since it contains the instructions needed to construct other components of cells, such as proteins and RNA molecules. The DNA segments that carry this genetic information are called genes, but other DNA sequences have structural purposes, or are involved in regulating the use of this genetic information.
Chemically, DNA consists of two long polymers of simple units called nucleotides, with backbones made of sugars and phosphate groups joined by ester bonds. These two strands run in opposite directions to each other and are therefore anti-parallel. Attached to each sugar is one of four types of molecules called bases. It is the sequence of these four bases along the backbone that encodes information. This information is read using the genetic code, which specifies the sequence of the amino acids within proteins. The code is read by copying stretches of DNA into the related nucleic acid RNA, in a process called transcription.
Within cells, DNA is organized into structures called chromosomes. These chromosomes are duplicated before cells divide, in a process called DNA replication. Eukaryotic organisms (animals, plants, and fungi) store their DNA inside the cell nucleus, while in prokaryotes (bacteria and archae) it is found in the cell's cytoplasm. Within the chromosomes, chromatin proteins such as histones compact and organize DNA. These compact structures guide the interactions between DNA and other proteins, helping control which parts of the DNA are transcribed.
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Added:5 months ago
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Lecture Series on BioChemistry I by Prof.S.Dasgupta, Dept of Chemistry, IIT Kharagpur. For more details on NPTEl visit ...
Lecture Series on BioChemistry I by Prof.S.Dasgupta, Dept of Chemistry, IIT Kharagpur. For more details on NPTEl visit http://nptel.iitm.ac.in
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Added:10 months ago
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http://www.FreeScienceLectures.com We travel inside nucleus to see how the DNA replicates. When DNA replicates its ...
http://www.FreeScienceLectures.com
We travel inside nucleus to see how the DNA replicates.
When DNA replicates its strands are separated by enzine helicase.
Single-stranded DNA binding proteines keep the strands from (...?).
One DNA strand encodes the leading strand using DNA Polymerase III.
Just watch to see what is going on.
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It's Never too Late to Study:
http://www.FreeScienceLectures.com
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Notice: This video is copyright by its respectful owners.
The website address on the video does not mean anything.
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You don't know how you met me You don't know why, you cant turn around and say good-bye All you know is when im with you ...
You don't know how you met me
You don't know why, you cant turn around and say good-bye
All you know is when im with you I make you free
And swim through your veins like a fish in the sea
I'm singing....
Follow me
Everything is alright
I'll be the one to tuck you in at night
And if you want to leave
I can guarantee
You won't find nobody else like me
And I worry 'bout the ring you wear
Cause as long as no one knows
That nobody can care
Your fellin guilty
And I'm well aware
But you don't look ashamed
And baby I'm not scared
Im singin...
Follow me
Everything is alright
I'll be the one to tuck you in at night
And if you want to leave
I can guarantee
You won't find nobody else like me
Solo
Won't give you money
I can't give you the sky
It better off if you don't ask why
I'm not the reason that you go stranded
We'll be alright if you don't ask me to stay
Follow me
Everything is alright
I'll be the one to tuck you in at night
And if you want to leave
I can guarantee
You won't find nobody else like me
You don't know how you met me
You don't know why, you cant turn around and say good-bye
All you know is when im with you I make you free
And swim through your veins like a fish in the sea
I'm singing....
Follow me
Everything is alright
I'll be the one to tuck you in at night
And if you want to leave
I can guarantee
You won't find nobody else like me
Follow me
Everything is alright
I'll be the one to tuck you in at night
And if you want to leave
I can guarantee
You won't find nobody else like me
Follow me
Everything is alright
I'll be the one to tuck you in at night
And if you want to leave
I can guarantee
You won't find nobody else like me
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video lang: en
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Added:1 year ago
Views:355,443
Adenosine triphosphate (ATP) is used to produce energy for cellular activities. The molecule is utilized for energy in ...
Adenosine triphosphate (ATP) is used to produce energy for cellular activities. The molecule is utilized for energy in cells by removing a phosphate group (dephosphorylation). This produces the molecule ADP (adenosine diphosphate), which is subsequently phosphorylated to produce ATP. This video summarizes the ATP cycle in cells and introduces the key terms. Groovy music by Ben Hammer.
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Added:1 year ago
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This 3D scientific animation dynamically show a zoom in from a group of dividing cells to a close-up of a DNA molecule ...
This 3D scientific animation dynamically show a zoom in from a group of dividing cells to a close-up of a DNA molecule.
Nucleus Medical Art is a leading creator and licensor of medical
illustrations, 3D medical animations and interactive multimedia for
medical devices, pharmaceutical companies, education, biotechnology,
marketing agencies, lawyers, and more. Online at
http://www.nucleusinc.com/youtube
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Added:10 months ago
Views:40,799
Mad cow disease, or bovine spongiform encephalopathy (BSE), is a fatal brain disorder that occurs in cattle and is caused ...
Mad cow disease, or bovine spongiform encephalopathy (BSE), is a fatal brain disorder that occurs in cattle and is caused by some unknown agent. In BSE, the unknown agent causes the cow's brain cells to die, forming sponge-like holes in the brain. The cow behaves strangely and eventually dies. The connection between BSE and humans was uncovered in Great Britain in the 1990s when several young people died of a human brain disorder, a new variation of a rare brain disorder called Creutzfeldt-Jakob Disease (CJD), which typically strikes elderly people. The new variation was called new variant Creutzfeldt-Jakob Disease (nvCJD), was similar to BSE and its connection to BSE was based on the following findings:
The nvCJD victims had lived in areas where outbreaks of BSE had occurred in cattle years earlier. No victims were found in areas without BSE outbreaks.
The brains of nvCJD victims had proteins called prions (pronounced "pree-ahnz") that were similar to those from the brains of BSE-infected cows, but different from those found in victims of classic CJD.
The time between the BSE outbreaks and the deaths of the victims was similar to the time that it takes for Creutzfeldt-Jakob disease to develop.
Brain tissue from BSE-infected cows caused experimental animals to develop symptoms and brain tissue disorders similar to those of the nvCJD victims.
The British government concluded that BSE was probably the cause of nvCJD, and that the victims contracted the disease probably by eating meat from BSE-infected cows.
How BSE Works
BSE is spread by contact with brain or other nervous-system tissue from an infected individual. Contact can be from eating food or food by-products that have been contaminated with nervous tissue, or from instruments that have contacted diseased nervous tissue. Once the infectious agent enters the brain, it can lie dormant for several years (even as long as 10 to 15 years). When activated, the agent kills brain cells, leaving large areas of spongy holes. Also, large clumps of abnormal prion proteins (plaques) are found in brain cells. Once the agent is activated, the disease runs its course in less than one year, and ultimately results in death.
We don't know the agent that causes BSE, but we do know the following:
The agent must be small - The agent's size must be as small or smaller than a virus.
You can't kill it by cooking or freezing - Much higher temperatures than those used in cooking or sterilizing are required to kill it.
Disinfectants don't work - Normal chemicals that you would use to disinfect surfaces for bacteria and viruses (Lysol, Betadine) are not effective.
It does not appear to have genetic information (nucleic acids) - This finding has been questioned.
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video lang: en
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Added:8 months ago
Views:8,024
Chemistry 3B: Chemical Structure and Reactivity. Spring 2006. Professor Peter Vollhardt. Chemistry 3B represents the ...
Chemistry 3B: Chemical Structure and Reactivity. Spring 2006. Professor Peter Vollhardt.
Chemistry 3B represents the second semester of ... all » the standard organic chemistry series at UC Berkeley. It covers conjugation, aromatic chemistry, carbonyl compounds, carbohydrates, amines, carboxylic acids, amino acids, peptides, proteins, and nucleic acid chemistry. Ultraviolet spectroscopy and mass spectrometry will be introduced. Organic chemistry is a specific discipline within the subject of chemistry. It is the scientific study of the structure, properties, composition, reactions, and preparation of chemical compounds of carbon and hydrogen, which may contain any number of other elements, such as...
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video lang: en
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Added:1 year ago
Views:10,713
In the beginning was the fingerprint. It was in the 19th century that scientists realized the ridged whorls on the tip of ...
In the beginning was the fingerprint.
It was in the 19th century that scientists realized the ridged whorls on the tip of the finger constituted a unique marker that could be used to tell one person from another. And eventually, the FBI built a massive database of fingerprints.
Then came DNA. In the 20th century, scientists learned to use the double helix nucleic acid molecule as a means of identification even more definitive than the fingerprint. And the FBI built a DNA database as well. Now the feds are building yet another database. And it has some folks worried.
Maybe you missed it in the run-up to Super Duper Tuesday when the Associated Press reported last week that the FBI will soon award a $1 billion, 10-year contract for construction of an electronic file that would store not just fingerprints and DNA, but a vast compendium of other physical characteristics. We're talking eye scans, facial shape, palm prints, scars, tattoos and other biometrics, all for the purpose of identifying and capturing bad guys.
But at least one privacy advocate thinks even good guys — and gals — have cause for concern. Barry Steinhardt, director of the ACLU's Technology and Liberty Project, told CNN, "It's the beginning of the surveillance society where you can be tracked anywhere, any time and all your movements, and eventually all your activities will be tracked and noted and correlated."
I know what some of you are saying and it makes a certain amount of sense: If you haven't done anything wrong, you have nothing to worry about. Well, I haven't done wrong, but it worries me just the same.
The government has for years collected fingerprints — not just of criminals, but also of certain job applicants. What's happening now, it could be reasonably argued, is only a high-tech extension of that. Except that instead of just your fingerprints, the government will also have on file the shape of your iris, that scar from your appendectomy and the tattoo on your inner thigh.
It's a discomfiting reminder of the totalitarian states of "Fahrenheit 451" and "1984," oppressive regimes that saw everything, knew everything, regulated everything. Given the advances in technology and the ominous, Orwellian turn our government has lately taken, the comparison seems far less far-fetched than once it might have.
It's not just the government, though. In recent years, the right to privacy, the right to simply be left alone, has also been eroded by the corporate community — everything from supermarket discount cards that track your buying habits to online businesses that install secret spyware in your computer. And we haven't even mentioned that there is a camera on every street corner nowadays.
"I always feel like somebody's watching me." That used to be just the hook from a schlocky '80s song. Increasingly, it is an apt description of modern life.
Now the FBI proposes to collect and collate still more personal information. It swears the information will be protected, and will be used only to ferret out criminals.
But I can't help a certain wariness when I consider the ease with which the program could expand far beyond that mission. As Steinhardt sees it, first criminals, then job applicants and then, "Eventually, it's going to be everybody."
I admit, he might be wrong. But you know something? He might not.
Leonard Pitts Jr. is a syndicated writer in Washington.
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Added:9 months ago
Views:3,249
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Lecture for Chapter 5 on Lipids. ... nutrition ...
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Added:1 year ago
Views:3,931
the postal service - such great heights High Rez ... the postal service ...
video lang: en
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Added:2 years ago
Views:2,836,216
Drama Rehearsal BAss ... Drama Rehearsal 12-02-06 Bass ...
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Added:2 years ago
Views:220
Welcome to The Daily Stock Report...brought to you by QualityStocks.net, where performance is tracked daily. I'm Jen ...
Welcome to The Daily Stock Report...brought to you by QualityStocks.net, where performance is tracked daily.
I'm Jen Hoffman, and for Wednesday January 9th we're bringing you the latest news from around the markets ...
(HEADLINE NEWS)
Today's headline news are brought to you by Pressure BioSciences, Inc. (PBIO)
Pressure BioSciences, Inc. (PBIO) is focused on developing products based on its proprietary pressure cycling technology (PCT) for life-sciences applications. The innovative technology utilizes hydrostatic pressure, which cycles between ambient and ultra-high levels, to rapidly and proficiently disrupt cell membranes/tissues to remove nucleic acids, proteins, and small molecules from plant and animal materials.
Lets get in to the Headline news for Tuesday...
McGraw-Hill Cos. said yesterday it plans to cut 600 jobs and will take a $43.7 million pretax charge to cover severance costs.
The fourth-quarter restructuring charge will reduce the company's earnings by $27.3 million, or 8 cents per share, after tax.
Pending U.S. home sales dipped in November, a trade group for real estate agents said yesterday, but it expects the sales pace to pick up significantly in the second half of 2008.
In another indication that the housing market's struggles aren't finished, the National Association of Realtors said its seasonally adjusted index of pending sales for existing homes fell 2.6 percent to a reading of 87.6 from an upwardly revised October index of 89.9.
The markets open this morning with...
The Dow down, 238.42 or 1.86%
The Nasdaq down, 58.95 or 2.36%
And the S&P 500 down, 25.99 or 1.84%
And now for a look at the Small Cap news Quality Stocks is tracking...
Small Cap headlines are brought to you by Cord Blood America, Inc., (CBAI.OB)
Cord Blood America (CBAI.OB) is focused on becoming the most respected stem cell preservation company in the world. The company plans to achieve its goal by educating expectant parents, families with a history of disease, critically ill patients, and all others who wish to learn about their life saving service.
The QualityStocks Daily Newsletter highlighted Universal Detection Technology (UDTT.OB) as "One To Watch" with over 14 million shares traded.
Universal Detection Technology (UDTT.OB )announced yesterday they have received an order from Security Solutions International for UDTT's plague detection kits, which will be utilized to provide counter-terrorism training and education to members of law enforcement and representatives from US Army and various other security and emergency response agencies.
Biophan Technologies, Inc. (BIPH.OB) up 96% with over 4 million shares traded.
Biophan Technologies, Inc. (BIPH.OB) recently laid out its strategic plan for the coming year, which includes a focused effort on the development of the Myotech Circulatory Support System (CSS), which offers acute circulatory support for patients suffering from sudden cardiac arrest.
Biophan Technologies, Inc. (BIPH.OB) announced that Earlier this year, the New England Journal of Medicine published a study that focused on the function and effectiveness of MRI in the detection of breast cancer.
NutraCea (NTRZ.OB) up 7% with over 1 million shares traded.
NutraCea (NTRZ.OB) is a leader in stabilized rice bran nutrient research and dietary supplement development. Through its wholly owned subsidiary RiceX, the company manufacturers as well as distributes products and food ingredients made from Rice Bran through its proprietary technology and processes.
NutraCea,(NTRZ.OB) a health-science company, engages in the development and distribution of stabilized rice bran and proprietary rice bran formulations.
And that's our newsmakers, Stay tuned right here to QualityStocks Daily Newsletter for the latest news from small cap to large cap, and everything in between by QualityStocks.net. Where performance is tracked daily.
Thank you for tuning in, I'm Jen Hoffman, Have a great day and we'll see you tomorrow, right here on The QualityStocks Daily Report.
Please see Disclaimer on site: http://Disclaimer.QualityStocks.net
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Added:10 months ago
Views:837
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http://www.videojug.com - Don't get left behind, learn how to show your affection for your fellow man. Give a great man ...
http://www.videojug.com - Don't get left behind, learn how to show your affection for your fellow man. Give a great man to man hug to your closest friends and family without getting that awkward feeling!
http://www.videojug.com/film/how-to-give-a-great-man-to-man- hug
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video lang: en
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Added:1 year ago
Views:386,298
this is a boring film about proteins, lipids, carbs, and nucleic acids that i spent hours on for it not to work when i ...
this is a boring film about proteins, lipids, carbs, and nucleic acids that i spent hours on for it not to work when i turned it in to eggleston.
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video lang: en
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Added:9 months ago
Views:340
The Makeup of the Body About ninety-five pounds of a one hundred and fifty pound man is water. Protein and stored fat ...
The Makeup of the Body
About ninety-five pounds of a one hundred and fifty pound man is water. Protein and stored fat account for a further fifty pounds, and the rest is glycogen, minerals and other substances, such as nucleic acids.
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video lang: en
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Added:1 year ago
Views:489
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