BSC 114 EXAMS 2 ALL ANSWERS AND QUESTIONS
SET A+
✔✔Photosynthesis - ✔✔The process that converst light energy into chemical energy
✔✔Autotrophs - ✔✔Organisms that sustain themselves without consuming anything
derived from other organisms
✔✔Photoautotrophs - ✔✔Organisms that use the energy of sunlight to make organic
molecules from water and CO2 via the process of photosynthesis
✔✔Heterotrophs - ✔✔Obtain their organic material from other organisms
✔✔What is the equation for photosynthesis? - ✔✔6 CO2 + 12 water + photons =
C6H12O6 + 6 O2 + 6 water
✔✔What do chloroplasts do in photosynthesis? - ✔✔Split water into hydrogen and
oxygen incorporating the electrons of hydrogen into sugar molecules
✔✔Mesophyll - ✔✔In plants this is where photosynthesis mainly occurs, it is located in
the interior of leaves
✔✔Chloroplasts - ✔✔The site of photosynthesis
✔✔Stomata - ✔✔Microscopic pores where CO2 enters the leaf and oxygen exits
✔✔Thylakoids - ✔✔Where chlorophyll are located in the interconnected membrane
bound sacs
✔✔Grana - ✔✔Thylakoids that stacked in columns
✔✔Stroma - ✔✔The fluid between the chloroplast inner membrane and thylakoid
membranes
, ✔✔Pigments - ✔✔Substances that absorb visible light
✔✔Why are plants green? - ✔✔Chlorophyll in chloroplasts do not absorb green light
✔✔Chlorophyll a - ✔✔The main photosynthetic pigment
✔✔Chlorophyll b - ✔✔Accesory pigment that broadens the spectrum used for
photosynthesis
✔✔Carotenoids - ✔✔Accessory pigments that absorb excessive light that would
damage chlorphyll
✔✔What happens when a pigment absorbs a photon? - ✔✔It goes from a stable ground
state to an excited state a result of an electron moving from a stable orbital to one that's
less stable
✔✔What happens when excited electrons fall back to the ground state? - ✔✔Heat and
photons are released
✔✔What does the light reaction supply the Calvin cycle with? - ✔✔ATP and NADPH
✔✔Where does the light reaction occur? - ✔✔Thylakoid membrane
✔✔What happens in the light reaction? - ✔✔Split water, release oxygen, reduce
NADP+ to NADPH, and generate ATP from ADP
✔✔Where does the Calvin cycle occur? - ✔✔In the stroma of the chloroplasts
✔✔What is the reaction-center chlorphyll a of PS II called? - ✔✔P680 because it is best
at absorbing a wavelength of 680nm
✔✔What is the reaction-center chlorophyll a of PS I called? - ✔✔P700 because it is best
at absorbing a wavelength of 700nm
✔✔Phases of the Calvin cycle - ✔✔Carbon fixation, reduction, and regeneration of the
CO2 acceptor RuBP
✔✔RuBisCo - ✔✔The enzyme that catalyzes the carbon fixation reaction
✔✔How many G3P's are made for every 3 molecules of CO2 in the Calvin Cycle? -
✔✔1 also 1 for every 3 spins of Calvin Cycle
SET A+
✔✔Photosynthesis - ✔✔The process that converst light energy into chemical energy
✔✔Autotrophs - ✔✔Organisms that sustain themselves without consuming anything
derived from other organisms
✔✔Photoautotrophs - ✔✔Organisms that use the energy of sunlight to make organic
molecules from water and CO2 via the process of photosynthesis
✔✔Heterotrophs - ✔✔Obtain their organic material from other organisms
✔✔What is the equation for photosynthesis? - ✔✔6 CO2 + 12 water + photons =
C6H12O6 + 6 O2 + 6 water
✔✔What do chloroplasts do in photosynthesis? - ✔✔Split water into hydrogen and
oxygen incorporating the electrons of hydrogen into sugar molecules
✔✔Mesophyll - ✔✔In plants this is where photosynthesis mainly occurs, it is located in
the interior of leaves
✔✔Chloroplasts - ✔✔The site of photosynthesis
✔✔Stomata - ✔✔Microscopic pores where CO2 enters the leaf and oxygen exits
✔✔Thylakoids - ✔✔Where chlorophyll are located in the interconnected membrane
bound sacs
✔✔Grana - ✔✔Thylakoids that stacked in columns
✔✔Stroma - ✔✔The fluid between the chloroplast inner membrane and thylakoid
membranes
, ✔✔Pigments - ✔✔Substances that absorb visible light
✔✔Why are plants green? - ✔✔Chlorophyll in chloroplasts do not absorb green light
✔✔Chlorophyll a - ✔✔The main photosynthetic pigment
✔✔Chlorophyll b - ✔✔Accesory pigment that broadens the spectrum used for
photosynthesis
✔✔Carotenoids - ✔✔Accessory pigments that absorb excessive light that would
damage chlorphyll
✔✔What happens when a pigment absorbs a photon? - ✔✔It goes from a stable ground
state to an excited state a result of an electron moving from a stable orbital to one that's
less stable
✔✔What happens when excited electrons fall back to the ground state? - ✔✔Heat and
photons are released
✔✔What does the light reaction supply the Calvin cycle with? - ✔✔ATP and NADPH
✔✔Where does the light reaction occur? - ✔✔Thylakoid membrane
✔✔What happens in the light reaction? - ✔✔Split water, release oxygen, reduce
NADP+ to NADPH, and generate ATP from ADP
✔✔Where does the Calvin cycle occur? - ✔✔In the stroma of the chloroplasts
✔✔What is the reaction-center chlorphyll a of PS II called? - ✔✔P680 because it is best
at absorbing a wavelength of 680nm
✔✔What is the reaction-center chlorophyll a of PS I called? - ✔✔P700 because it is best
at absorbing a wavelength of 700nm
✔✔Phases of the Calvin cycle - ✔✔Carbon fixation, reduction, and regeneration of the
CO2 acceptor RuBP
✔✔RuBisCo - ✔✔The enzyme that catalyzes the carbon fixation reaction
✔✔How many G3P's are made for every 3 molecules of CO2 in the Calvin Cycle? -
✔✔1 also 1 for every 3 spins of Calvin Cycle
