File Name: structure and function of dna .zip
The code within our DNA provides directions on how to make proteins that are vital for our growth, development, and overall health. DNA stands for deoxyribonucleic acid.
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DNA , abbreviation of deoxyribonucleic acid , organic chemical of complex molecular structure that is found in all prokaryotic and eukaryotic cells and in many viruses. DNA codes genetic information for the transmission of inherited traits. Deoxyribonucleic acid DNA is an organic chemical that contains genetic information and instructions for protein synthesis. It is found in most cells of every organism. DNA is a key part of reproduction in which genetic heredity occurs through the passing down of DNA from parent or parents to offspring. DNA is made of nucleotides. A nucleotide has two components: a backbone, made from the sugar deoxyribose and phosphate groups, and nitrogenous bases, known as cytosine , thymine , adenine , and guanine.
PDF | The proposal of a double-helical structure for DNA over 60 years ago provided an eminently satisfying explanation for the heritability of.
Metrics details. Of all the molecules in nature, DNA is the most exalted.
Alongside proteins , lipids and complex carbohydrates polysaccharides , nucleic acids are one of the four major types of macromolecules that are essential for all known forms of life. The two DNA strands are known as polynucleotides as they are composed of simpler monomeric units called nucleotides. The nucleotides are joined to one another in a chain by covalent bonds known as the phospho-diester linkage between the sugar of one nucleotide and the phosphate of the next, resulting in an alternating sugar-phosphate backbone. The nitrogenous bases of the two separate polynucleotide strands are bound together, according to base pairing rules A with T and C with G , with hydrogen bonds to make double-stranded DNA. The complementary nitrogenous bases are divided into two groups, pyrimidines and purines. In DNA, the pyrimidines are thymine and cytosine; the purines are adenine and guanine.
DNA Structure and Function , a timely and comprehensive resource, is intended for any student or scientist interested in DNA structure and its biological implications. The book provides a simple yet comprehensive introduction to nearly all aspects of DNA structure. It also explains current ideas on the biological significance of classic and alternative DNA conformations.
PDF | On Oct 17, , Ali Saleh and others published DNA Structure and Function | Find, read and cite all the research you need on.
Deoxyribonucleic acid, or DNA, is a molecule that contains the instructions an organism needs to develop, live and reproduce. These instructions are found inside every cell, and are passed down from parents to their children. DNA is made up of molecules called nucleotides. Each nucleotide contains a phosphate group, a sugar group and a nitrogen base. The four types of nitrogen bases are adenine A , thymine T , guanine G and cytosine C.
Patsye Peebles, William H. The American Biology Teacher 1 October ; 49 7 : — Sign In or Create an Account. User Tools. Sign In. Skip Nav Destination Article Navigation.
DNA is perhaps the most famous biological molecule; it is present in all forms of life on earth. But what is DNA or deoxyribonucleic acid? Here, we cover the essentials. Virtually every cell in your body contains DNA or the genetic code that makes you you. DNA carries the instructions for the development, growth, reproduction, and functioning of all life. Differences in the genetic code are the reason why one person has blue eyes rather than brown, why some people are susceptible to certain diseases, why birds only have two wings, and why giraffes have long necks. Amazingly, if all of the DNA in the human body was unraveled, it would reach to the sun and back more than times.
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Джабба, - проворковала женщина в ответ. - Это Мидж. - Королева информации! - приветствовал ее толстяк. Он всегда питал слабость к Мидж Милкен.
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Стратмор кивнул: - Думал. Но решил этого не делать. Сьюзан так и подумала.
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