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BS 161 EXAM 2 NEWEST EXAM COMPLETE 200 QUESTIONS AND CORRECT DETAILED ANSWERS
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BS 161 EXAM 2 NEWEST EXAM COMPLETE 200 QUESTIONS AND CORRECT DETAILED ANSWERS
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BS 161 EXAM 2 NEWEST EXAM COMPLETE200 QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) ALREADY
GRADED A+.
which stages of cellular respiration produce CO2 as a waste
product - ANSWER >>>>pyruvate oxidation and citric acid
cycle
what is the net product of glycolysis - ANSWER >>>>2
pyruvate
T/F: Pyruvate oxidation produces a large amount of ATP
through substrate-level phosphorylation - ANSWER >>>>false
which stage of cellular respiration occurs following production
of pyruvate - ANSWER >>>>pyruvate oxidation
what happens when glucose is phosphorylated during phase
1 of glycolysis - ANSWER >>>>glucose is destabilized so it
can be broken apart in phase 2
of the 6 carbons in a starting molecule of glucose, at the
completion of pyruvate oxidation, _____ carbons are fully
oxidized to _____, while _______ carbons remain in
_________ - ANSWER >>>>two; CO2; four; acetyl groups
which stage of cellular respiration uses O2 as an input -
ANSWER >>>>oxidative phosphorylation
,The interior region of a phospholipid bilayer is characterized
as:
hydrophilic and polar.
hydrophobic.
polar.
hydrophilic. - ANSWER >>>>b
In water, phospholipids can spontaneously form lipid bilayer
structures. What bonds/forces/interactions are most influential
in formation of the lipid bilayer?
-hydrogen bond interactions among water molecules and
polar phospholipid heads
-ionic interactions among Cl- ions and phosphates in the
phospholipid heads
-van der Waals attractions among water molecules and fatty
acid tails
-hydrophobic exclusion of nonpolar fatty acid tails
-covalent bonds among phospholipids - ANSWER >>>>a and
d
Long, saturated fatty acid tails _____ lipid mobility and _____
membrane fluidity
enhance; maintain
enhance; increase
reduce; decrease
reduce; increase
maintain; decrease - ANSWER >>>>c
A transmembrane protein is a protein that spans the entire
lipid bilayer. Which of the following amino acids would likely
,be found the hydrophobic region that is embedded in the
membrane?
alanine
serine
arginine
lysine
glutamic acid - ANSWER >>>>a
Refer to Animation: Diffusion. Diffusion is best described as
the random movement of molecules influenced by:
-the width of the plasma membrane of the cell.
-energy transferred from molecular collisions in the cell.
-the thermal energy of the environment and energy
transferred from molecular collisions in the cell.
-the thermal energy of the environment and the width of the
plasma membrane.
-the thermal energy of the environment. - ANSWER >>>>c
Refer to Animation: Diffusion. Molecules that are
_____________ and _____________ are able to move
across the cell membrane via simple diffusion.
hydrophobic; small
hydrophobic; large
hydrophilic; large
hydrophilic; small - ANSWER >>>>a
`Refer to Animation: Diffusion. At equilibrium, there will be no
net movement of molecules across the cell membrane.
true
, false - ANSWER >>>>a
Refer to Animation: Diffusion. Simple diffusion of a molecule
down its concentration gradient requires an input of energy to
the system.
true
false - ANSWER >>>>b
Refer to Animation: Osmosis. Which of the answer choices
correctly describes the movement of water across a
selectively permeable membrane during osmosis?
-The water will move from low solute concentration to high
solute concentration.
-Either of these descriptions is correct and equivalent.
-The water will move from high water concentration to low
water concentration. - ANSWER >>>>b
Refer to Animation: Osmosis. A container is divided into two
compartments by a membrane that is fully permeable to water
but not to larger molecules. Water is added to one side of the
membrane (side A), and an equal volume of a 5% solution of
glucose is added to the other (side B). What would you predict
will happen?
-The water level on side B will increase and on side A will
decrease.
-Glucose will diffuse from side A to side B.
-The water level on side A will increase and on side B will
decrease.
-Glucose will diffuse from side B to side A. - ANSWER >>>>a
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