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p62 #1-15 - There are two layers that compose the cell...

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Joseph Leonard – 11/15/07 – p62 #1-15 1. Explain the relationship between amino acids, peptide bonds, and proteins. Amino acids are the monomer building blocks of proteins. When two are joined together in a peptide bond, they form proteins. 2. How are the structures of monosaccharides, disaccharides, and polysaccharides related to each other? Two monosaccharides form together to form a disaccharide. A polysaccharide is a complex molecule composed of three or more monosaccharides. 3. Explain the relationship between a polypeptide and a peptide bond. A polypeptide is amino acids that bond to each other one at a time to form a long chain held together by peptide bonds. 4. What is the difference between a hydrophilic and hydrophobic substance? A hydrophilic substance is attracted to water, while a hydrophobic substance tends not to interact with water molecules. 5. Why is the structure of the cell membrane referred to as a bilayer?
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Unformatted text preview: There are two layers that compose the cell membrane 6. What helps keep the temperature of living things? d) stable 7. The distinguishing feature of a molecule of a polar compound is its b) uneven distribution of electrical charge 8. The element that readily bonds to itself, forming long chains and rings, is c) carbon 9. Plants store glucose in d) simple sugar molecules 10. A very strong structural molecule in plants that is formed by hydrogen bonding between chains of glucose molecules is b) wax 11. When two amino acids bond, c) a dipeptide is formed through a condensation reaction 12. Lipids are distinguished from other organic molecules because they b) do not dissolve in water 13. Steroids differ from other lipid polymers in that steroids d) are not composed of fatty acid monomers 14. Most enzymes are a) lipids 15. A compound that stores hereditary information is c) DNA...
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