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BIO 227 LECTURE EXAM 1 QUESTIONS AND VERIFIED ANSWERS..

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BIO 227 LECTURE EXAM 1 QUESTIONS AND VERIFIED ANSWERS

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BIO 227
Course
BIO 227

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Responsiveness


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ability to detect and react to stimuli (changes in the external or internal
environment)




Charged amino acid


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glutamic acid, aspartic acid, histidine, lysine, arginine

,bases


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-proton acceptors (H+ acceptor); bases dissociate
- many bases produce hydroxide ions in solution (OH-)
-Ex) NaOH-> Na+ + OH-




nucleic acids


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DNA and RNA




inferior


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closer to the feet




components of homeostatic systems


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stimulus, receptor, control center, effector

,effects of enzyme and substrate conc


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adding substrate will increase reaction time up until a certain point




Buffers (What do they do?)


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precents pH differences by accepting or donating H+ to neutralize




Steroids: made of, role


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made of 4 hydrocarbon rings(forms cell membranes)

Role:lipid-based hormone

*Ex) cholesterol




hydrophobic interactions


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, afraid of water, won't mix, weak




wrist


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carpal




hollow behind knee


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popliteal




Electronegativity


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refer to pic




irreversible chemical reaction

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BIO 227

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