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What is DNA?

Paul Andersen describes the molecular structure of DNA. He describes the major parts of a nucleotide and explains how they are assembled into a nucleic acid. The nitrogenous base, deoxyribose sugar and phosphate group make up a single nucleotide. The 5' and 3' end of DNA is described. The importance of hydrogen bonds in the 3-dimensional shape is also included.
Категория: Education
Время: 00:07:53.250
Теги: DNA RNA nucleotide nitrogenouse base deoxyribose sugar phosphate group deoxyribonucleic acid ap biology biology genes
 

DNA and Mutations

The DNA strand is composed of a phosphate head, a sugar and a nitrogenous base. The shape of the DNA is a double helix that is made through the hydrogen bonds that connect the nitrogenous bases. The nitrogenous bases each have a letter: A,T, C or G. A sequence of three of these letters, called a codon, code for an amino acid. Those amino acids make proteins. A mutation can occur, in which any one of the letters, or bases, is changed. When that occurs, the amino acid changes which also refults in a change of the function of the protein. Lung cancer is an example of a mutation. The carcinogens in tobacco provide a chemical mutation that occurs in the tissues in the lungs.
Категория: Science & Technology
Время: 00:01:52.500
Теги: dna mutation smoking cigarettes double helix nitrogenous base amino acid phosphate head sugar hydrogen bonds dave patricia dora
 

Nitrogen based web IDE for Nitrogen (ofcourse!)

nide is an simple but powerful webIDE using the Nitrogen framework, EditArea and various JSquery plugins with the purpose to speed up development of Erlang/Nitrogen projects. On this video you can see also the use of niter plugin www.linuxer.gr http github.com
Категория: Howto & Style
Время: 00:02:20.250
Теги: erlang nitrogen IDE
 

DNA Song

DNA Song. Here is a song I made for a student to help the study. I hope you enjoy! Here we go, genetic code, determines how you live Oh size, shape, color and all makes you who you is You should know the chromosomes has thousands of genes AT and GC makes types of proteins During synthesis, the cell uses info From a gene on a chromosome Out in the cytoplasm and on the ribosomes Info needs to get out the nucleus It's the DNA, in ya It's the genetic code, in ya Paring Nitrogen bases, in ya The double helix ladder, in ya Oohh Adenine goes with Thymine And Guanine pairs with Cytosine Matched pairs of DNA, bases How cells produce proteins Ooh, no, no, no Send, send, send the code out to the cytoplasm This genetic messenger is ribonucleic acid RNA, DNA, differ in many ways, yeah RNA molecules look like one side or strand Ribonucleic acid has a different sugar Has uracil instead of thymine Messenger RNA sends info out to the cytoplasm Transfer adds amino acids to proteins It's the DNA, in ya It's the genetic code, in ya Paring Nitrogen bases, in ya The double helix ladder, in ya Oohh Adenine goes with Thymine And Guanine pairs with Cytosine Matched pairs of DNA, bases How cells produce proteins Messenger RNA production Ooh, attaches to a ribosome Transfer attaches to messenger Ribosome releases, the completed protein chain But don't you know it's the DNA, in ya It's the genetic code, in ya Paring Nitrogen bases, in ya The double helix ladder, in ya Oooh Adenine goes with Thymine ...
Категория: People & Blogs
Время: 00:02:45
Теги: DNA
 

Mutations

Our video shows the process of replication, transcription and translation. We explain the significance of the sequence of nitrogenous bases for coding amino acids. Through diagrams we show how a mere change in one nitrogenous base effects the entire function of the cell, which can lead to loss of control in the cell. Cigarette smoke, ultraviolet light, and nuclear radiation are all examples of mutagenic agents which can lead to the breakdown of DNA. Any substitution or deletion of nitrogenous bases can lead to production of inappropriate proteins, resulting in loss of control in cells, which could ultimately lead to cancer. (Mara FitzGerald, Daisy Grondin & Brianna Lynch)
Категория: People & Blogs
Время: 00:02:39
Теги: large
 

16 - Nitrogen Bases

Категория: Education
Время: 00:01:00
Теги: 16 Nitrogen Bases
 

3.3.4 Explain how a DNA double helix is formed

3.3.4 Explain how a DNA double helix is formed using complementary base pairing and hydrogen bonds. Nitrogenous bases from two single strands are joined using the complimentary base pairing rule. Adenine with Thymine (using two hydrogen bonds) and Cytosine with Guanine (using three hydrogen bonds). A DNA double helix is formed firstly when a nucleotide joins with another nucleotide by a covalent bond forming a single strand. The nitrogenous bases from this single strand then bond to nitrogenous bases from another single strand (by the complimentary base pairing rule and using hydrogen bonds as stated above) in order to form a double helix. Note that the two strand are antiparallel to each other (running in opposite directions as indicated by the arrows).
Категория: Education
Время: 00:00:59.250
Теги: DNA structure nucleotide educational IB Biology help review assessment statements
 

Gene Mutations Song

Created this for a lesson I was teaching on genetic mutations. (To the instrumental track for Mariah Carey's "Angels Cry") Genes Go Awry Point mutations will change A single base and in this case You can't erase what's been changed As it's permanent Written into our code It's passed on with each episode Of cell division It's found in new daughter cells Carcinogens and radiation Mistakes in DNA replication All these can cause a gene mutation In different cell types One nitrogen base will take the place Of one more, in the strand, as genes go awry In substitution, one resolution is a silent Mutation. Proteins will be alright. Genetic mutations will arrive Causing protein change or cells to die When polymerase fails to do its job right Genes will go awry Nitrogen substitution is just one Kind of a gene mutation Where a base is switched in the sequence Missense just calls for aminos to change Nonsense code stops in exchange Terminating more protein growth Some other types of gene mutations Are the insertions and deletions Which cause a shift in the reading sequence Of the codon reading frames One nitrogen base will take the place Of one more, in the strand, as genes go awry In substitution, one resolution is a silent Mutation. Proteins will be alright. Genetic mutations will arrive Causing protein change or cells to die When polymerase fails to do its job right Genes will go awry Mutations can cause disease, or cancer to spread with ease Yet there are some that increase an ...
Категория: Education
Время: 00:02:55.500
Теги: More Grad Shenanigans & Mutation Rap 035
 

DNA and RNA

This video was made in Dr. O's A&P1 class. Make sure you answer & review the questions at the end of the video, and also the following questions: 1.What is Replication? 2.What are the pairings of nitrogen bases (ie, of A,G,T and C) in DNA? 3. What is the sugar-phosphate backbone? 4.What is Transcription? 5.What nitrogen base is found in RNA but not in DNA? 6. What is Translation? 7. Where in the cell do the processes of Replication, Transcription, and Translation occur?
Категория: Science & Technology
Время: 00:02:09
Теги: mxplk
 

PHYSIOLOGY; REVIEW OF NUCLEOTIDES, NUCLEIC ACIDS, VITAMINS & MINERALS by Professor Fink

Review of Biological Chemistry, including Nucleotides, Nucleic Acids, Vitamins & Minerals. Reference is made to the components of each nucleotide: a 5-Carbon sugar (ribose or deoxyribose), a nitrogenous base, and phosphate. Purine bases (adenine & guanine) and Pyrimidine bases (thymine, cytosine & uracil) are described. Special reference is made to the high energy nucleotide, Adenosine Triphosphate (ATP), as well as AMP and ADP. Both the molecular structure of RNA is presented, and the molecular structure of DNA. Reference is made to complementary binding of bases and the Double Helix structure of the DNA. Clarification is given to the terms: Chromatids, Chromatin (uncoiled) Shape & Chromosomes (coiled-up) Shape of the DNA molecule. The principal functions of the lipid-soluble vitamins (retinol, calciferol, tocopherol & phylloquinone) & water-soluble vitamins (ascorbic acid, niacin, riboflavin & pantothenic acid) and the macronutrient minerals (calcium, phosphate, sodium & potassium) & micronutrient (trace) minerals (iron, iodine, copper & zinc). Reference is made to anti-oxidants, goiters & anemia.
Категория: Education
Время: 00:42:09.750
Теги: Physiology Biological Chemistry Nucleotides Nucleic Acids ribose deoxyribose nitrogenous base Purine bases adenine guanine Pyrimidine bases thymine cytosine uracil Adenosine Triphosphate ATIP AMP ADP RNA DNA Double Helix Chromatids Chromatin Chromosomes macronutrient minerals trace minerals anti-oxidants goiters anemia Professor Fink www.professorfink.com
 
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