Read e-book online Essentials of Molecular Biology PDF

By George M. Malacinski

ISBN-10: 0867208600

ISBN-13: 9780867208603

A textual content for a quick first direction in molecular biology. therapy takes a layering process, the place complexity is constructed bankruptcy by means of bankruptcy instead of provided all of sudden. contains bankruptcy summaries, drill questions, difficulties, and conceptual questions, plus uncomplicated - colour diagrams. This 3rd

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Additional resources for Essentials of Molecular Biology

Example text

This very general phenomenon will be explored extensively throughout the book, especially in Chapter 11. Both simple and complex regulatory systems will be described, all of which act to determine how much of a particular compound is utilized and how much of each intracellular compound is synthesized at different times and in different circumstances. We will learn about the lengths to which the socalled simple cells go to utilize limited resources efficiently and to optimize their metabolic pathways for efficient growth.

Few, if any, nucleic acid or protein molecules exist in nature as random coils because there are many interactions between elements of the chains. These interactions are hydrogen bonds, hydrophobic interactions, ionic bonds, and van der Waals interactions. Hydrogen-Bonding The most common hydrogen bonds found in biological systems are shown in Figure 2-8. In RNA, intrastrand hydrogen bonds cause the polynucleo tide strand to be folded. Thus it is more compact than would be expected for long, single-stranded molecules.

Each nucleotide has the three following components (Figure 2-5): 1. A cyclic five-carbon sugar. This is ribose, in the case of ribonucleic acid (RNA), and deoxyribose, in deoxyribonucleic acid (DNA). The difference in the structure of ribose and 2'-deoxyribose is shown in Figure 2-5. html[12/20/2009 1:03:43] page_26 Figure 2-5 Structure of a mononucleotide. ) The OH in RNA at the 2'C position facilitates chemical breakdown of RNA. Thus, DNA is more stable than RNA. html[12/20/2009 1:03:43] page_27 < previous page page_27 next page > Page 27 Figure 2-6 The bases found in nucleic acids.

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