Bio 200 midterm Exam with verified detailed
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answers
isotopes - correct answer✔✔different atomic forms of the same element that differ in the
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total # of neutrons found in the nucleus
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radioactive isotope - correct answer✔✔An isotope whose nucleus decays spontaneously, ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
giving off particles and energy.
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Electronegativity - correct answer✔✔the ability of an atom to attract electrons when the ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
atom is in a compound
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covalent bond - correct answer✔✔A chemical bond formed when two atoms share electrons
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ionic bond - correct answer✔✔A chemical bond resulting from the attraction between
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oppositely charged ions. ||\\//|| ||\\//||
hydrogen bond - correct answer✔✔weak attraction between a hydrogen atom and another
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atom
van der Waals forces - correct answer✔✔a slight attraction that develops between the
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oppositely charged regions of nearby molecules ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
cation - correct answer✔✔positive ion
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anion - correct answer✔✔negative ion
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,polar covalent bond - correct answer✔✔A covalent bond in which electrons are not shared
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equally
chemical equilibrium - correct answer✔✔the point at which the reactions offset one another
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exactly
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trace elements - correct answer✔✔required by an organism in only minute quantities
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importance of key elements of life - correct answer✔✔C,H,O,N make up 95% of life ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
4%- Calcium,Phosphorus,Potassium, and Sulfur
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water Basics - correct answer✔✔water is cohesive & Adhesive
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water maintains a relatively constant temperature
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water is a good solvent ||\\//|| ||\\//|| ||\\//|| ||\\//||
water expands when it freezes ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
water has a nuetral PH ||\\//|| ||\\//|| ||\\//|| ||\\//||
hydrphobic - correct answer✔✔Repels water ||\\//|| ||\\//|| ||\\//|| ||\\//||
Hydrophilic - correct answer✔✔loves water ||\\//|| ||\\//|| ||\\//|| ||\\//||
Reactants - correct answer✔✔a substance that takes part in and undergoes change during a
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reaction.
Products - correct answer✔✔Ending materials in a chemical reaction.
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, Reactions - correct answer✔✔chemical changes ||\\//|| ||\\//|| ||\\//|| ||\\//||
solution - correct answer✔✔A homogeneous mixture of two or more substances
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solvents - correct answer✔✔Dissolve other substances (water) ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
solutes - correct answer✔✔dissolved substances ||\\//|| ||\\//|| ||\\//|| ||\\//||
hydroxyl group - correct answer✔✔consists of a hydrogen atom bonded to an oxygen atom
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OH, polar ||\\//||
ex: ethanol
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carbonyl group - correct answer✔✔C=O, polar ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
ex: methanal
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carboxyl group - correct answer✔✔COOH ||\\//|| ||\\//|| ||\\//|| ||\\//||
organic acids ||\\//||
amino group - correct answer✔✔acts as a base
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can pick up a H+
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NH2
sulfhydryl group - correct answer✔✔thiol ||\\//|| ||\\//|| ||\\//|| ||\\//||
form a covalent bond ||\\//|| ||\\//|| ||\\//|| ||\\//||
SH
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answers
isotopes - correct answer✔✔different atomic forms of the same element that differ in the
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
total # of neutrons found in the nucleus
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radioactive isotope - correct answer✔✔An isotope whose nucleus decays spontaneously, ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
giving off particles and energy.
||\\//|| ||\\//|| ||\\//|| ||\\//||
Electronegativity - correct answer✔✔the ability of an atom to attract electrons when the ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
atom is in a compound
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covalent bond - correct answer✔✔A chemical bond formed when two atoms share electrons
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
ionic bond - correct answer✔✔A chemical bond resulting from the attraction between
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
oppositely charged ions. ||\\//|| ||\\//||
hydrogen bond - correct answer✔✔weak attraction between a hydrogen atom and another
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
atom
van der Waals forces - correct answer✔✔a slight attraction that develops between the
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
oppositely charged regions of nearby molecules ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
cation - correct answer✔✔positive ion
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anion - correct answer✔✔negative ion
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,polar covalent bond - correct answer✔✔A covalent bond in which electrons are not shared
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
equally
chemical equilibrium - correct answer✔✔the point at which the reactions offset one another
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
exactly
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trace elements - correct answer✔✔required by an organism in only minute quantities
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
importance of key elements of life - correct answer✔✔C,H,O,N make up 95% of life ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
4%- Calcium,Phosphorus,Potassium, and Sulfur
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water Basics - correct answer✔✔water is cohesive & Adhesive
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
water maintains a relatively constant temperature
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
water is a good solvent ||\\//|| ||\\//|| ||\\//|| ||\\//||
water expands when it freezes ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
water has a nuetral PH ||\\//|| ||\\//|| ||\\//|| ||\\//||
hydrphobic - correct answer✔✔Repels water ||\\//|| ||\\//|| ||\\//|| ||\\//||
Hydrophilic - correct answer✔✔loves water ||\\//|| ||\\//|| ||\\//|| ||\\//||
Reactants - correct answer✔✔a substance that takes part in and undergoes change during a
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
reaction.
Products - correct answer✔✔Ending materials in a chemical reaction.
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
, Reactions - correct answer✔✔chemical changes ||\\//|| ||\\//|| ||\\//|| ||\\//||
solution - correct answer✔✔A homogeneous mixture of two or more substances
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
solvents - correct answer✔✔Dissolve other substances (water) ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
solutes - correct answer✔✔dissolved substances ||\\//|| ||\\//|| ||\\//|| ||\\//||
hydroxyl group - correct answer✔✔consists of a hydrogen atom bonded to an oxygen atom
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OH, polar ||\\//||
ex: ethanol
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carbonyl group - correct answer✔✔C=O, polar ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
ex: methanal
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carboxyl group - correct answer✔✔COOH ||\\//|| ||\\//|| ||\\//|| ||\\//||
organic acids ||\\//||
amino group - correct answer✔✔acts as a base
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can pick up a H+
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NH2
sulfhydryl group - correct answer✔✔thiol ||\\//|| ||\\//|| ||\\//|| ||\\//||
form a covalent bond ||\\//|| ||\\//|| ||\\//|| ||\\//||
SH
