light dependent stage of photosynthesis

Question 1

what is photolysis

Answer 1

splitting by water where h+ ions and OH ions are split

Question 2

what is photoinosiation

Answer 2

where chlorophyll molecules become ionised

Question 3

why does photoinosation occour

Answer 3

because chlorophyll absorbs light meaning ions have more energy leaving the chlorophyll molecule

Question 4

where does light enter

Answer 4

through photosystem 2

Question 5

what is the electron path way in the light dependent stage

Answer 5

during the phosporolation of the h+ ions 2e-travels up through the reaction centre in phtosystem two where it gains a higher energy level down the cytochrome along the electron transfer chain up through photosystem 1 and helps bond NADP +H+ to form NADPH.

Question 6

describe the H journey in the light dependent photosynthesis

Answer 6

through cheomosmosis the H+ goes down through the thylaokoid membrane and into the thylakoid lubem where it sets up a proton gradient and joins with the 2H+ and 1/2 O2 from the photolysis of H2O. it then travels toand up the atp synthase

Question 7

how do H+ molecules get across the thaylakoid membrane

Answer 7

chemiosmosis

Question 8

what occours in the ATP synthase

Answer 8

[prontons move down gradient through ATP synthase. the movement of protons drives conversion of adp to ATP so adp+p is converted to ATP by with the use of the H+

Question 9

what does the movemne to fprotons in the atp synthase cause

Answer 9

movement of protons drives the conversion of adp into atp

Question 10

what are the two products of the lightdependent reaction

Answer 10

NADPH and ATP

Question 11

what stages does photoionisation occour

Answer 11

when the light enters the chloroplasts the it absorbs light energy cuaing elctrons to become excited leaving the reaction centre