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Biology 30Jan17 (Nucleic Acids (DNA is composed of nucleotides that…
Biology 30Jan17
Nucleic Acids
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DNA is composed of nucleotides that contain a sugar, a phosphate group, and one of four nitrogen-containing bases.
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A second nucleic acid is RNA which transports the information encoded in DNA to sites of protin synthesis.
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Chemical bonding
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Ionic Bonding
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Two atoms will undergo a process of ionization when the electronegativity differences between them are great enough that one atom loses one or more electrons to the other.
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Carbohydrates
Formed from the building blocks or monomers of simple sugars, such as glucose, fructose, or galactose
Complex Carbohydrates
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Cellulose is a rigid, structural carbohydrate found in the cell walls of many organisms
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Lipids
Triglycerides
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Steroids: composed of a core of 4 carbon rings; examples include cholesterol, testosterone, and estrogen
Phospholipids: composed of two fatty acids, glycerol, and a phosphate group and are the material that forms the plasma membrane of cells
Waxes: composed of a single fatty acid linked to a long-chain alcohol and have an important sealing function in the living world
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Homework
Chapter 2:
Review Questions 2, 4, 5, 6, 7, 8, 9, 10, &11
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Through electronegativity, a molecule can take on a polarity- a difference in electrical charge at one end compared to the other.