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Deoxyribonucleic acid (/ diːˈɒksɪˌraɪboʊnjuːˌkliːɪk, - ˌkleɪ -/ ⓘ; [ 1 ]DNA) is a polymer composed of two polynucleotide chains that coil around each other to form a double helix. The polymer carries genetic instructions for the development, functioning, growth and reproduction of all known organisms and many viruses.
Each strand of DNA is like a recipe book for synthesizing proteins. Certain sequences of nitrogenous bases along the strand encode particular RNA molecules. These sequences are called genes. mRNA molecules transcribed from genes are translated into proteins later.
8 Απρ 2019 · Deoxyribonucleic acid, or DNA, is a biological macromolecule that carries hereditary information in many organisms. DNA is necessary for the production of proteins, the regulation, metabolism, and reproduction of the cell.
17 Μαρ 2022 · DNA is a working molecule; it must be replicated when a cell is ready to divide, and it must be “read” to produce the molecules, such as proteins, to carry out the functions of the cell. For this reason, the DNA is protected and packaged in very specific ways.
Most DNA is found inside the nucleus of a cell, where it forms the chromosomes. Chromosomes have proteins called histones that bind to DNA. DNA has two strands that twist into the shape of a spiral ladder called a helix.
30 Ιουλ 2022 · Draw a complete picture of all the tRNA molecules that will match up with the codons from the previous question. Include all appropriate amino acids in your picture, and do not mix up their order! Draw a picture of the completed protein coded for by this strand of DNA (abbreviations are fine).
Chromosomal DNA is packaged inside microscopic nuclei with the help of histones. These are positively-charged proteins that strongly adhere to negatively-charged DNA and form complexes called...
