quiz 6 key - both of them This is induced fit 5 Identify...

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Biochemistry 309, Winter 2010 20 points Quiz #6 NAME:_______________________________ TA:__________________ 1. How many chiral centers are present in glucose (a six carbon aldose) in its linear and cyclic forms? (2 points) linear: 4 chiral centers cyclic: 5 chiral centers 2. How many chiral centers are present in fructose (a six carbon ketose) in its linear and cyclic forms? (2 points) linear: 3 chiral centers cyclic: 4 chiral centers 3. Active transport involves the coupling of energetically favorable events with transport of molecules up a concentration gradient. List two types of active transport and a form of chemical energy used by each. (4 points) Primary: ATP hydrolysis Seondary: proton gradient, sodium gradient 4. Define induced fit. (2 points) A non-covalent interaction between two molecules can alter the conformation of one or
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Unformatted text preview: both of them. This is induced fit. 5. Identify the type of glycosidic bond and the carbons involved. If present, circle the anomeric carbon. Are the monosaccharide units used to build this disaccharide the same or different? (4 points) This disaccharide (maltose) is made from identical monosaccharides (glucose). 6. Phospholipase D cleaves the head group from phosphatidylcholine to produce phosphatidic acid and free choline. Indicate which bond is attacked in this reaction. (2 points) 7. How do antibodies like IgG recognize many different antigens? (2 points) Because the amino acid sequence of the antigen binding domain is highly variable, allowing for many different shapes to be recognized....
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