Factors that effect photosynthesis

Question 1

whatare limiting factors

Answer 1

factors that reduce the rate of photosynthesis

Question 2

examples of limiting factors

Answer 2

light intensity, carbon dioxide avaliability, water avaliabilty and temperature

Question 3

how does water affect photosynthesis

Answer 3

its needed as an input and a lack of water makes plants plants lose their turgor and their stomata close, preventing gas exchange, including the absorption of CO2

Question 4

chlorophyll b

Answer 4

chlorophyll that is an adaptation to the shade, is an accessory piment that absorbs lights and passes the energy to chlorophyll a

Question 5

carotenoids

Answer 5

accessory pigment that absorbs orange light and pases the energy to chlorophyll a

Question 6

how does light intensity affect photosynthesis

Answer 6

light is required in the light dependent stage of photosynthesis to provide energy required to split thw water molecules into hydrogen and oxygen

Question 7

graph of light intensity

Answer 7

there is a point reached where increasing light intensity does not include the rate of reaction, called light saturation, the graph then platoes

Question 8

light saturation

Answer 8

occurs when more ATP and NADPH are produced that is required by the light independent

Question 9

light compensation

Answer 9

the light insenity at which the rate of photosynthesis is equual to the rate of cellular respiration, all oxygen and CO2 produced is used

Question 10

how does carbon dioxide affect photosynthesis

Answer 10

as carbon dioxide increases so does the rate of photosynthesis as long as there is enough RuBisCO to catalyse the reaction, as long as tthere is enough ATP and NADPH from the light dependent stage, carbon dioxide also raises the light saturation point as more ATP and NADPH is being used

Question 11

how do higher temps affect photosynthesis

Answer 11

more kinetic energy, causing more collisions between enzymes and substrates leading to more products being formed, above the optimum temp RuBisCO has a higher affinity for O2 so rate of reaction decreases, if too high temps, enzymes become denatured

Question 12

low temperature affect on photosynthesis

Answer 12

decreased rate of reaction as less kinetic energy, inreasing light temp doesn’t havemuchh affect as it does when increasing at higher temps