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![](/olcweb/styles/shared/spacer.gif) | ![](/sites/dl/free/0072324813/title/mader_human7e.jpg) Human Biology, 7/e Dr. Sylvia S. Mader
DNA and Biotechnology
Chapter Outline
21.1 DNA and RNA Structure and FunctionDNA is the genetic material, and therefore, its structure and function constitute the molecular basis of inheritance. 422When DNA replicates, two exact copies result. RNA structure is similar to, but also different from, that of DNA. RNA occurs in three forms, each with a specific function. 424-25 |
![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | 21.2 Gene ExpressionProteins are composed of amino acids, and they function, in particular, as enzymes and as structural elements of membranes and organelles in cells. 426DNA's genetic information codes for the sequence of amino acids in a protein during protein synthesis. 426There are various levels of genetic control in human cells. 431 |
![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | ![](/olcweb/styles/shared/spacer.gif) | 21.3 BiotechnologyRecombinant DNA technology is the basis for biotechnology, an industry that produces many products. 432Modern-day biotechnology is expected to produce many products and to revolutionize agriculture and animal husbandry. It also permits gene therapy and the mapping of human chromosomes. 434 |
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