Biochemistry 2280A Chapter Notes - Chapter 14: Arginine, The Blenders, Peptide
24 Apr 2018
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Two main types of nucleic acids: those based on the sugar ribose are known as ribonucleic acids, or rna, and contain the bases a, g, c, and u. A dna molecule consists of two complementary chains of. Dna: the case for dna began to emerge in the late 1920s, when a british medical of cer named fred grif th made an astonishing discovery, he was studying streptococcus pneumoniae (pneumococcus), a bacterium that causes pneumonia. As antibiotics had not yet been discovered, infection with this organism was usually fatal: lab pneumococci come in two forms. 9 form: grif th injected various preparations of these bacteria into mice. The heat-killed pneumococci had somehow converted the harmless bacteria into the lethal form. Because the viral dna enters the bacterial cell, while the rest of the virus particle remains outside, the researchers decided to radioactively label the protein in one batch of virus and the.
