BIOLOGY 160 EXAM #2 QUESTIONS WITH ANSWERS
LATEST UPDATE ALREADY GRADED A+
1st law - correct answer- energy in universe is constant;
energy can be transferred or transformed; cannot be created
nor destroyed
during every transfer/transformation, some energy becomes
unavailable to do work, converted to thermal energy and
released as heat
2nd law - correct answer- energy conversions increase the
entropy of the universe
activation energy - correct answer- amount of energy
needed to move uphill to a higher energy, unstable state
active site - correct answer- substrate fits into
active transport - correct answer- cell must expend energy
to move solute against concentration gradient
ATP supplies the energy
,allows cells to maintain internal concentrations of small
molecules and ions that are different from surroundings
alcohol fermentation - correct answer- yeasts and some
bacteria recycle their NADH back to NAD+, while converting
pyruvate to CO2 and ethanol
ethanol is toxic to those that produce it, so they release alcohol
wastes to surroudings
animal cell in hypertonic solution - correct answer- cell
shrivels and can die from water loss
animal cell in hypotonic solution - correct answer- cell gains
water; swells and may burst
animal cell in isotonic solution - correct answer- volume
remains constant
aquaporins - correct answer- allow only water molecules to
pass thru them
found in bacteria, plants, and animals
, ATP - correct answer- powers cellular work
bonds between phosphate groups are unstable and can be
broken by hydrolysis
hydrolysis of ATP is exergonic
ATP is renewable
atp to glucose ratio - correct answer- 32 ATP molecules per
glucose altogether from cellular respiration
ATP to NADPH - correct answer- energy provided to boost
an electron from photosystem 2 to a higher energy level
caught by primary electron acceptor
electrons loaded onto ETC "ramp" leading to photosystem 1
as electrons roll down ramp, they release energy thats used to
make ATP
when electrons reaches photosystem 1, another photon pumps
it up to higher energy level, where its caught by primary electron
acceptor on photosystem 1 platform
photoexcited electron thrown into bucket to make NADPH
autotrophs - correct answer- make their own food (plants)
LATEST UPDATE ALREADY GRADED A+
1st law - correct answer- energy in universe is constant;
energy can be transferred or transformed; cannot be created
nor destroyed
during every transfer/transformation, some energy becomes
unavailable to do work, converted to thermal energy and
released as heat
2nd law - correct answer- energy conversions increase the
entropy of the universe
activation energy - correct answer- amount of energy
needed to move uphill to a higher energy, unstable state
active site - correct answer- substrate fits into
active transport - correct answer- cell must expend energy
to move solute against concentration gradient
ATP supplies the energy
,allows cells to maintain internal concentrations of small
molecules and ions that are different from surroundings
alcohol fermentation - correct answer- yeasts and some
bacteria recycle their NADH back to NAD+, while converting
pyruvate to CO2 and ethanol
ethanol is toxic to those that produce it, so they release alcohol
wastes to surroudings
animal cell in hypertonic solution - correct answer- cell
shrivels and can die from water loss
animal cell in hypotonic solution - correct answer- cell gains
water; swells and may burst
animal cell in isotonic solution - correct answer- volume
remains constant
aquaporins - correct answer- allow only water molecules to
pass thru them
found in bacteria, plants, and animals
, ATP - correct answer- powers cellular work
bonds between phosphate groups are unstable and can be
broken by hydrolysis
hydrolysis of ATP is exergonic
ATP is renewable
atp to glucose ratio - correct answer- 32 ATP molecules per
glucose altogether from cellular respiration
ATP to NADPH - correct answer- energy provided to boost
an electron from photosystem 2 to a higher energy level
caught by primary electron acceptor
electrons loaded onto ETC "ramp" leading to photosystem 1
as electrons roll down ramp, they release energy thats used to
make ATP
when electrons reaches photosystem 1, another photon pumps
it up to higher energy level, where its caught by primary electron
acceptor on photosystem 1 platform
photoexcited electron thrown into bucket to make NADPH
autotrophs - correct answer- make their own food (plants)
