mcdb exam, chapter 20 questions and
answers
where does photophosphorylation occur? - Correct Answers -in the chloroplasts
what is the end goal of photophosphorylation? - Correct Answers -energy creation as
NADPH and ATP
what are chromophores? - Correct Answers -molecules that absorb light and then
release it
when manganese takes electrons from water, how many protons are released? -
Correct Answers -4
what side of the chloroplast has a high proton concentration? - Correct Answers -the
lumen
per 2 photons absorbed, how many electrons are donated from water to NADP+ -
Correct Answers -1
how many protons are pumped to the lumen per pair of electrons passed through the
photophosphorylation chain? - Correct Answers -4 net protons
per 2 waters consumed and 1 oxygen created, how many protons have moved into the
lumen? - Correct Answers -12
what are photosystems? what do they contain? - Correct Answers -functional arrays
containing chlorophyll and other pigments, proteins, and a reaction center
how does exciton transfer work? - Correct Answers -light excites a chlorophyll molecule,
raising an electron to a higher energy state. the high-energy electron is passed to a
neighboring pigment. this passing continues until it reaches the electron acceptor
molecule at the reaction center.
how is the electron donor's "electron hole" replenished? - Correct Answers -the
neighboring pigment donates an electron, hence how the chain works.
where are the reaction centers in chloroplasts? - Correct Answers -thylakoid membrane
what does photosystem II resemble in terms of bacterial reaction centers? - Correct
Answers -pheophytin-quinone, bacterial type II
answers
where does photophosphorylation occur? - Correct Answers -in the chloroplasts
what is the end goal of photophosphorylation? - Correct Answers -energy creation as
NADPH and ATP
what are chromophores? - Correct Answers -molecules that absorb light and then
release it
when manganese takes electrons from water, how many protons are released? -
Correct Answers -4
what side of the chloroplast has a high proton concentration? - Correct Answers -the
lumen
per 2 photons absorbed, how many electrons are donated from water to NADP+ -
Correct Answers -1
how many protons are pumped to the lumen per pair of electrons passed through the
photophosphorylation chain? - Correct Answers -4 net protons
per 2 waters consumed and 1 oxygen created, how many protons have moved into the
lumen? - Correct Answers -12
what are photosystems? what do they contain? - Correct Answers -functional arrays
containing chlorophyll and other pigments, proteins, and a reaction center
how does exciton transfer work? - Correct Answers -light excites a chlorophyll molecule,
raising an electron to a higher energy state. the high-energy electron is passed to a
neighboring pigment. this passing continues until it reaches the electron acceptor
molecule at the reaction center.
how is the electron donor's "electron hole" replenished? - Correct Answers -the
neighboring pigment donates an electron, hence how the chain works.
where are the reaction centers in chloroplasts? - Correct Answers -thylakoid membrane
what does photosystem II resemble in terms of bacterial reaction centers? - Correct
Answers -pheophytin-quinone, bacterial type II
