| what are the function of chloroplasts | contain the green pigment called chlorophyll which absorbs light energy for photsynthesis chemical reactions |
| what is the summary word equation for photosynthesis | carbon dioxide + water → glucose + oxygen
(requirements are light and chlorophyll above and below arrow) |
| what are the two stages of photosynthesis | the light reactions
carbon fixation |
| describe the light reactions stage of photosynthesis | the light energy from the sun is trapped by chlorophyll in the chloroplasts and is converted into chemical energy which is used to generate the energy transfer molecule ATP
water is split to produce hydrogen and oxygen. Oxygen diffuses from the cell |
| describe the carbon fixation stage of photosynthesis | carbon fixation is a series of enzyme controlled reactions which use hydrogen and ATP (produced by the light reactions) with carbon dioxide to produce sugar |
| what is the chemical energy in sugar from photosynthesis used for? | available for respiration or the sugar can be converted into other substances such as starch (storage) and cellulose (structural) |
| what factors can affect photosynthesis | light intensity
carbon dioxide concentration
temperature |
| what is a limiting factor? | a factor that holds up a process when it is in short supply |
| what is the limiting factor at point A in the graph | carbon dioxide concentration |
| what is the limiting factor at point B in the graph | light intensity |
| what is the limiting factor at point C in the graph | temperature |
