photosynthesis

Question 1

photosynthesis equation

Answer 1

carbon dioxide + water = glucose + oxygen
(uses light energy)

Question 2

is photosynthesis endothermic or exothermic

Answer 2

endothermic- energy is transferred from the environment and absorbed by chlorophyll

Question 3

process of photosynthesis

Answer 3

CO2 taken in by leaves and up the roots
chlorophyll traps the light energy needed for photosynthesis
energy used to convert CO2 and H2O into glucose

Question 4

why are leaves adapted for photosynthesis

Answer 4

leaves are broad and flat so large surface area and thin so diffusion path is short
guard cells open the stomata so that gases can diffuse in and out of the cells spaces inside the leaves
photosynthetic cells in the leave have chlorophyll
veins contains xylem which brings water to the leaves and phloem takes the glucose away

Question 5

limiting factors

Answer 5

anything that stops the rate of photosynthesis increasing above a certain level.

Question 6

what is the glucose produced by photosynthesis used for

Answer 6

converted into insoluble starch for storage in organs
used for respiration
converted into fats and oils for storage
used to produce cellulose which strengthens cell walls
used to produce proteins

Question 7

conditions to ensure plants photosynthesise for as long as possible

Answer 7

temp is maintained at optimum for enzyme action
CO2 levels are increased so its not a limiting factor
artificial lighting can be used
levels of nutrients such as nitrate ions must be monitored