Archive for July, 2010
Last Updated on Saturday, 31 July 2010 11:24 Written by Administrator Saturday, 31 July 2010 11:24
Flashing DNA Molecule: This is a wooden DNA molecule ornament that Kit & I have in our side yard. At Christmas time, we light it up with falshing lights. It symbolized fertility and the miracle of life and re-generation.
Tags: Flashing, molecule | Posted under DNA Videos | 1 Comment
Last Updated on Thursday, 29 July 2010 12:05 Written by Administrator Thursday, 29 July 2010 12:05
Enjoy — this clip is from BBC AS Guru — now no longer in existence. Genetics & DNA Oh do write a comment,please and vote 
************DISCLAIMER***************** This movie is uploaded (like all others — unless specified) for the sole purpose of education and not for profits. It is designed to help mostly A-level students in their biological science studies. No copyright infringement intended. *****************************
Video Rating: 4 / 5
Tags: Genetics, PART, Structure | Posted under DNA Videos | 25 Comments
Last Updated on Tuesday, 27 July 2010 02:56 Written by Administrator Tuesday, 27 July 2010 02:56
Protein Synthesis, DNA Replication DNA replication is the process of copying a double-stranded DNA molecule to form two double-stranded molecules.[1][2] The process of DNA replication is a fundamental process used by all living organisms as it is the basis for biological inheritance. As each DNA strand holds the same genetic information, both strands can serve as templates for the reproduction of the opposite strand. The template strand is preserved in its entirety and the new strand is assembled from nucleotides — this process is called “semiconservative replication”. The resulting double-stranded DNA molecules are identical; proofreading and error-checking mechanisms exist to ensure near perfect fidelity.
Tags: Protein, replication, Synthesis | Posted under DNA Videos | 17 Comments
Last Updated on Sunday, 25 July 2010 10:52 Written by Administrator Sunday, 25 July 2010 10:52
Check us out at www.tutorvista.com Deoxyribonucleic acid (DNA) 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, or a code, 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 long structures called chromosomes. These chromosomes are duplicated before cells divide, in a process called DNA replication. Eukaryotic organisms (animals, plants, fungi …
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Tags: Acid, Deoxyribonucleic | Posted under DNA Videos | No Comments