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BCS 1010 (Biology) FINAL EXAM 1 REVIEW STUDY QUESTIONS AND ANSWERS WITH DEFINATIONS.
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BCS 1010 (Biology) FINAL EXAM 1 REVIEW STUDY QUESTIONS AND ANSWERS WITH DEFINATIONS.
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BCS 1010 (Biology) FINAL EXAM 1 REVIEWSTUDY QUESTIONS AND ANSWERS WITH
DEFINATIONS.
When the atoms involved in a chemical bond, the electrons are shared,
and one atom is more electronegative, what type of bond results?
✔✔A polar covalent bond
Nonpolar covalent bond
✔✔a covalent bond in which the electrons are shared equally by the two
atoms
polar covalent bond
✔✔A covalent bond in which electrons are not shared equally
A chemical bond can form if two atoms are so unequal in their attraction
for valence electrons that one atom strips an electron completely from the
other, which is called _____________ and that atoms that are positively
charged are called _________________.
✔✔ionic bond; cations
Cations
✔✔positively charged atoms (Plussy cast)
Anions
✔✔negatively charged atoms (Sad Ann)
,What are the three properties of water?
✔✔cohesion, adhesion, surface tension
Cohesion, surface tension, and adhesion are the properties of water
molecules that ___________.
✔✔are a result of hydrogen bonding
chemical equilibrium
✔✔Forward and reverse reactions continue with no net effect on the
concentrations of the reactants and products
If the concentration of hydrogen ions in a solution is 10^-9, the pH of the
solution will be:
✔✔9
pH of a solution
✔✔the negative logarithm of the hydrogen ion concentration
Hydrophobic
✔✔Having an aversion to water; tending to coalesce and form droplets in
water.
Hydrophilic
✔✔Having an affinity for water.
A substance that minimizes changes in concentrations of H+ and OH- in a
solution is called a:
✔✔Buffer
,amino acids hook together by means of ___________ bonds produced via
_____________ to form _______________.
✔✔peptide bonds; dehydration reaction; polypepetides
Polypeptide
✔✔A polymer (chain) of many amino acids linked together by peptide
bonds.
peptide bond
✔✔The chemical bond that forms between the carboxyl group of one
amino acid and the amino group of another amino acid
dehydration reaction
✔✔A chemical reaction in which molecules combine by removing water
Isomers
✔✔Two different molecules that have the same chemical formula
cis isomer
✔✔the two Xs are on the same side
trans isomer
✔✔the two x's are on opposite sides
structural isomers
✔✔changes due to the position of the double bond
, Enantiomers
✔✔isomers that are mirror images of each other
unsaturated fatty acids differ from saturated fatty acids by:
✔✔the presence of carbon-carbon double bonds
Carbohydrates are formed by dehydration reactions involving:
✔✔monosaccharides
Fats (lipids) are produced by combining
✔✔fatty acids and glycerol
Proteins are formed by
✔✔amino acids
Nucleic acids are composed of
✔✔nucleotides
What provides the information necessary to determine a protein's 3-D
shape?
✔✔Sequence of amino acids in the polypeptide chain
Purine bases
✔✔Adenine and Guanine
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