UMD BSCI 330 Exam 1 Questions With Correct Answers

UMD BSCI 330 Exam 1 Questions With
Correct Answers

what is the difference between seeing and visualizing? - CORRECT
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ANSWER✔✔-seeing- can detect | |




visualizing- seeing shapes, structures, measuring
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Given the following building blocks ==> structures
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sugar |




fatty acid
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amino acid |




nucleotides - CORRECT ANSWER✔✔-sugar ==> polysaccharides
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fatty acid ==> fat, lipids, membranes
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amino acid ==> protein
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nucleotides ==> nucleic acid | | |




condensation reactions link ___ to form ___ - CORRECT ANSWER✔✔-
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condensation reactions link monomers to form polymers
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,in condensation reactions, removing H2O ____. While adding H2O ____
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|- CORRECT ANSWER✔✔-in condensation reactions, removing H2O
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forms molecules. While adding H2O breaks down molecules.
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what structure is the plant cell wall made of? - CORRECT ANSWER✔✔-
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carbohydrates


describe the chemical nature of carbohydrates - CORRECT
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ANSWER✔✔-- highly polar | |




-hydrophilic |




-H bond forming
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describe the chemical feature(s) of carbohydrates - CORRECT
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ANSWER✔✔-- linear chain | |




| OR
-ring (polymer) |




-several OH groups (potential for linkage)
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why can we digest starch & not cellulose - CORRECT ANSWER✔✔-starch
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has alpha link b/t glycosidic bonds. cellulose has beta link and we dont
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have a beta enzyme. | | |

, when naming linkages, position 1 OH group determines... - CORRECT
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ANSWER✔✔-Beta - Up | |




Alpha - Down
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the ___ nature of lipids can be membranes/barriers between 2 aqueous
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compartments - CORRECT ANSWER✔✔-hydrophobic
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describe the chemical feature(s) of lipids - CORRECT ANSWER✔✔-
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hydroen chains w/ polar COOH at the ends
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describe the chemical nature of lipids - CORRECT ANSWER✔✔-
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amphipathic (one end likes water)
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Describe a phospolipid - CORRECT ANSWER✔✔-- x2 fatty acid tails
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(nonpolar/hydrophobic)


-head group (polar/hydrophillic)(charged Phosphate)
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Describe Tay-Sachs disease - CORRECT ANSWER✔✔-neuron cells
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mutated and improperly metabolize gangleoside (Gm2) as it
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accumulates