Photosynthesis. Flashcards
1
Q
What is photosynthesis?
A
A process used by autotrophs to convert light energy (photons) from sunlight into chemical energy and synthesise large organic molecules from inorganic
2
Q
What is photosynthesis?
A
A process used by autotrophs to convert light energy (photons) from sunlight into chemical energy and synthesise large organic molecules from inorganic
3
Q
What does respiration provide photosynthesis and what does photosynthesis provide respiration?
A
- Respiration: provides H2O and CO2
- Photosynthesis: O2 and C6H12O2
4
Q
What is a granum and what is it’s function?
A
- Structure: the inner part of chloroplasts made of stacks of thylakoid membranes
- Function: the site of the LIGHT DEPENDENT STAGE of photosynthesis
5
Q
What is the structure of a thylakoid and what is its function?
A
- Structure: flattened membrane bound sac
- Function: contains photosynthetic pigments/photo systems to trap light. It makes up the grana which is the site of LDR.
6
Q
Describe 2 ways in which the structure of the grana is adapted to its function
A
- Has an increased surface area to increase the number of photosystems, this maximises light absorbance
- Has a high number of electron carriers and ATP synthase in its membrane.
7
Q
What is the structure and function of the storms
A
- Structure: Fluid filled matrix containing enzymes, starch grains, oil droplets and small ribosomes.
- Function: Site of the LIGHT INDEPENDENT STAGE of photosynthesis
