Photosynthesis 2

Question 1

photosynthesis process

Answer 1

photosynthesis —- glucose —- pyruvate (3 carbon molecule)

Question 2

light dependant reaction

Answer 2

first process, light turns water into oxygen producing ATP/NADPH

Question 3

where does light dependant occur

Answer 3

thylakoid

Question 4

stroma reactions

Answer 4

after light dependant, ATP/NADPH go to calvin cycle and form chemical energy (carbon fixation)

Question 5

where does stroma reactions occur

Answer 5

stroma

Question 6

waste products of photosynthesis

Answer 6

lactic acid/ethanol

Question 7

where does photosynthesis occur

Answer 7

in chloroplast

Question 8

origins of photosynthesis

Answer 8

anoxygenic (not producing oxygen) evolved in early bacteria which moved by horizontal gene transfer to others, then oxygenic photosynthesis occurred (from cyanobacteria)

Question 9

light capture

Answer 9

electromagnetic spectrum, most leaves absorb red/blue and reflect green, darker colours absorb more colours but get warmer

Question 10

photon and how they react with molecules

Answer 10

light particle, either reflect, transmit (pass through), absorbed

Question 11

energy gradient

Answer 11

further away from reaction centre absorbed at higher levels

Question 12

reaction centre

Answer 12

where all light ends up, electrons get excited and lose electrons which go to electron transport chain

Question 13

electron transport chain

Answer 13

electron lost from reaction centre travels through electron acceptors, last acceptor is NADPH and ATP is formed

Question 14

calvin cycle (carbon fixation)

Answer 14

co2 is fixed by rubisco to ruBp which get reduced to G3P, then its regenerated to RuBp

Question 15

reduction/regeneration

Answer 15

ATP/NADPH and ATP