LSU BIOL 1201 Exam 1 - Easley Louisiana State
University and Agricultural & Mechanical College
Questions with 100% Verified Answers Latest Update
Question: what are the four emergent properties of water that are important for life?
Answer:
cohesion, moderation of temperature, expansion upon freezing, solvent properties
Question: water shows high cohesion and surface tension and can absorb large amounts of
heat because of large number of which type of bonds between water molecules?
Answer:
weak ionic interactions
Question: what would occur if water was treated with molecules that reduce or remove
surface tension?
Answer:
treated water droplets would form a thin film instead of beading on a waxed surface treated
water would form smaller droplets when dripping from a sink water jumpers would sink
Question: in a glass of old-fashioned lemonade, what is the solvent?
Answer:
water
Question: what is the concentration of hydroxide ions in a solution where pH = 10?
Answer:
1 x 10^-4 M each pH unit represents a tenfold change in proton concentration
Question: compared to an acidic solution at pH 5, a basic solution at pH 8 has how many
hydrogen ions?
Answer:
1000 times fewer hydrogen ions a change of one pH unit represents a tenfold change in
proton concentration in solution
Question: in a glass of cola, what is the solute?
Answer:
sugar
Question: to neutralize a given volume of household bleach, you would need a similar
volume of what solution?
, Answer:
battery acid it is a similar distance from neutral on the acidic side of the pH scale ad bleach
is on the basic side
Question: if you were working with a protein that needed a certain pH to work, what would
you need in the solution containing the protein?
Answer:
buffer
Question: if you were a fish in a pond in the winter in Minnesota, for what property of water
would you be most grateful?
Answer:
hydrogen bonding the hydrogen bonds among water molecules lead to ice being less dense
than liquid water floats above aquatic organisms rather than sinking and crushing them
Question: if you were a spider sliding across a pond in the summer, what property of water
would you be most grateful for?
Answer:
cohesion it allows for surface tension, which, in turn, allows small, light, creatures to walk on
water
Question: if you are looking at your dinner plate and see small circles in the aqueous meat
juices on your plate what word best applies to the circles?
Answer:
hydrophobic the hydrophobic lipids from the cells in the meat would have been cooked out
and are adhering to another due to hydrophobic interactions
Question: why would a pool of water crack a boulder sitting in it during freezing weather
Answer:
expansion of the water when it freezes
Question: protons
Answer:
the number of __________ determines an atom's identity.
University and Agricultural & Mechanical College
Questions with 100% Verified Answers Latest Update
Question: what are the four emergent properties of water that are important for life?
Answer:
cohesion, moderation of temperature, expansion upon freezing, solvent properties
Question: water shows high cohesion and surface tension and can absorb large amounts of
heat because of large number of which type of bonds between water molecules?
Answer:
weak ionic interactions
Question: what would occur if water was treated with molecules that reduce or remove
surface tension?
Answer:
treated water droplets would form a thin film instead of beading on a waxed surface treated
water would form smaller droplets when dripping from a sink water jumpers would sink
Question: in a glass of old-fashioned lemonade, what is the solvent?
Answer:
water
Question: what is the concentration of hydroxide ions in a solution where pH = 10?
Answer:
1 x 10^-4 M each pH unit represents a tenfold change in proton concentration
Question: compared to an acidic solution at pH 5, a basic solution at pH 8 has how many
hydrogen ions?
Answer:
1000 times fewer hydrogen ions a change of one pH unit represents a tenfold change in
proton concentration in solution
Question: in a glass of cola, what is the solute?
Answer:
sugar
Question: to neutralize a given volume of household bleach, you would need a similar
volume of what solution?
, Answer:
battery acid it is a similar distance from neutral on the acidic side of the pH scale ad bleach
is on the basic side
Question: if you were working with a protein that needed a certain pH to work, what would
you need in the solution containing the protein?
Answer:
buffer
Question: if you were a fish in a pond in the winter in Minnesota, for what property of water
would you be most grateful?
Answer:
hydrogen bonding the hydrogen bonds among water molecules lead to ice being less dense
than liquid water floats above aquatic organisms rather than sinking and crushing them
Question: if you were a spider sliding across a pond in the summer, what property of water
would you be most grateful for?
Answer:
cohesion it allows for surface tension, which, in turn, allows small, light, creatures to walk on
water
Question: if you are looking at your dinner plate and see small circles in the aqueous meat
juices on your plate what word best applies to the circles?
Answer:
hydrophobic the hydrophobic lipids from the cells in the meat would have been cooked out
and are adhering to another due to hydrophobic interactions
Question: why would a pool of water crack a boulder sitting in it during freezing weather
Answer:
expansion of the water when it freezes
Question: protons
Answer:
the number of __________ determines an atom's identity.
