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20 Cards in this Set
- Front
- Back
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when two atoms are equally electrnegative, they will interact to form?
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nonpolar covalent bonds
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desert rabbits are adapted to the warm climate because their large ears aid in the removal of heat due to the?
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buffering capacity of water
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which of the following is not a weak molecular interaction?
-colvalent bond -van der waals interaction - ionic bond in presence of water - hydrogen bond |
a colvalent bond
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Why are humans able to digest starch but not cellulose?
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humans have enzymes that can hydrolyze the Alpha glycosidic linkages of starch, but not the Beta glycosidic linkages of cellulose.
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Nitrogen is much more electronegative than Hydrogen. which statment is true for NH3
- each hydrogen atom has a positive charge -there are colvalent bonds between the hydrogen atoms |
each hydrogen atom has a positive charge
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which of the following solutions has the greatest concentration of hydrogen ions?
-gastric juice at pH 2 -vinegar at pH 3 -tomato juice at pH 4 -black coffee at pH 5 |
gastric juice at pH 2
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Water is able to form hydrogen bonds because?
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the bonds that hold together the atoms in a water molecule are polar covalent bonds.
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the tertiary structure of a protien is the..?
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unique three-dimensional shape of fully folded polypeptide.
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what is a trace element?
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elements that are required by organisms in only minute quantities
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which of the following is a trace element?
-nitrogen -sodium -iodine |
iodine
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Electrons exist only at fixed levels of potential energy.However, if an atom absorbs sufficient energy, a possible result is?
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the atom may move to an electron shell farther out from the nucleus.
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one differencce between carbon-12 and carbon-14 is that carbon-14?
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has two more neutrons than carbon-12.
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the atomic number of chlorine is 17. the atomic number o magnesium is 12. what is the formula of magnesium chloride?
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MgCl2
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the hydrogenation of vegetable oil would be a result of?
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an increase in the number of hydrogen atoms in the oil.
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the difference between the sugar in DNA and the sugar in RNA is that the sugar in DNA..?
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contains one less oxygen atom.
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which of the following best describes the flow of inormation in eurkaryotic cell?
-DNA -> RNA -> Protein -DNA -> Protien -> RNA |
DNA -> RNA -> Protein
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the solution contains .00000001 moles of hydroxide ions. which best describes this solution?
-acidic H+ acceptor -acidic H+ donor |
acidic H+ donor
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van der waals interaction result when?
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electrons are not symmetrically distributed in a molecule.
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A triacylglycerol is?
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a lipid made with three fatty acids and glycerol.
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if the pH of the blood drops, one would expect?
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the HCO3; act like a base and remove excess H+ with the formation of H2CO3.
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