photosynthesis

Question 1

light reactions

Answer 1

use light absorption to power the synthesis of ATP and NADPH

Question 2

dark reactions

Answer 2

use ATP and NADPH to run pentose phosphate and glycolysis in reverse

Question 3

metal bound in choloryphyll’s heme-like porphyrin ring

Answer 3

Mg

Question 4

which wavelengths of light does chloroyphyll a or chlorophyll b not absorb very well

Answer 4

500-600 nm

Question 5

carotenoids

Answer 5

accessory pigments
unsaturated chain flanked by two rings
isoprenoid units

Question 6

phycobilins

Answer 6

open chain tetrapyrrols (4 rings)

Question 7

phycoerythrin

Answer 7

red algae

Question 8

phycocyanin

Answer 8

cyanobacteria

Question 9

n side

Answer 9

stroma

Question 10

p side

Answer 10

lumen

Question 11

chromophore wavelength for photosystem 1

Answer 11

P700

Question 12

how many H+ pumped per photon in ps1

Answer 12

2

Question 13

input for cytochrome b6f

Answer 13

input: plastoquinone PQH2 (PSII) or 2 Ferredoxin Fd (PSI)

Question 14

output for cytochrome b6f

Answer 14

2 molcules of plastocyanin (Cu) 1 e- carrier

Question 15

cyclic flow purpose

Answer 15

photophosphorylation

Question 16

noncylic flow purpose

Answer 16

biosynthesis of NADPH

Question 17

how are e- replaced in noncylic plow

Answer 17

PSII use H2O as an e- source to replensih Cyt b6f

Question 18

where are all the H+ from H2O released in photosystem II

Answer 18

p side (lumen)

Question 19

what catalyzes the splitting of water in photosystem II

Answer 19

mn4 cluster and tyrosine

Question 20

what does splitting water yield

Answer 20

free e- to replenish chlorophyll

Question 21

how many H+ are pumped into the lumen per o2 formed

Answer 21

12

Question 22

first enzyme in CO2 fixation

Answer 22

ribulose - 1, 5- bisphosphate carboxulase/pxygenase

Question 23

lysine 201 carbamate

Answer 23

CO2 + lysine, but not CO2 fixed in reaction

Question 24

Mg2+ ion in ribulose-1,5

Answer 24

binds RuBP and activates H2O molecule that hydrates the carboxyl-beta intermediate

Question 25

for each CO2 that passes through the calvin cycle, how many ATP needed

Answer 25

2

Question 26

for each CO2 that passes through the calvin cycle, how many NADPH needed

Answer 26

2

Question 27

where does the NADPH in the calvin cycle come from

Answer 27

light reactions

Question 28

how many molecules of CO2 needed to make a hexose

Answer 28

6

Question 29

how many GAP, NADPH, and ATP needed to make a hexose

Answer 29

12

Question 30

input molecules to regenerate RuBP

Answer 30

2 molecules of DHAP 4 molecules of GAP 2 molecules of F6P

Question 31

enzymes in regenerating RuBP

Answer 31

transketolases transaldolases

Question 32

what is needed in regerating rubp

Answer 32

ATP

Question 33

light reactions equation

Answer 33

8 NADP+3 ADP + 3 HPO42- + H+ + 8 photons (4 ea to PSI and PSII) -> O2 + 3 ATP + 2 NADH + H2O

Question 34

Dark reaction equation

Answer 34

6 CO2 + 18 ATP + 12 NADPH + 12 H2O -> C6H12O6 + 18 ADP + 18 HPO42- + 12 NADP+ + 6H+

Question 35

how many times do the light rxns need to be performed to balance with the dark reactions

Answer 35

6 times

Question 36

net reaction of photosynthesis

Answer 36

6 CO2 + 6 H2O + 48 photons --> C6H12O6 + 6 O2

Question 37

what is rubisco stimulated by

Answer 37

high pH, CO2, and Mg2+