Chloroplasts Flashcards
where in the cell does photosynthesis occur?
Inside the chloroplasts
what do the inner membrane and outer membrane of the chloroplast make up?
They make up the chloroplasts envelope
Structure of the thylakoid membrane?
- They are arranged in stacks which contain pigments including chlorophyll.
- these stacks of membrane are called grana
where does the light dependent reaction occur?
Thylakoid membrane
where does the light Independent reaction occur?
Stroma
where are the photosynthetic pigments found?
- Found within the photosystems which are embedded in the thylakoid membrane of the grana
what happens to the products of the light dependent reaction?
They move from the thylakoid membrane into the stroma for the light dependent reaction. The ATP is used to fix the CO2 into glucose.
what is the circular DNA?
- Independent of DNA in plant cell nucleus.
- This gene codes for proteins required for photosynthesis.
Is circular DNA similar to mitochondrion?
yes, similar to mitochondrion and photosynthetic bacteria
what is the thylakoid membrane?
- series of flattened sacs allowing compartmentalisation so that different enzyme - driven reactions can occur at the same time
- the site of photosystems (light harvesting units), electron carriers and ATP synthase
What is Granum/Grana?
In some places the membrane are arranged into stacks creating a larger surface area for photosystems.
- This increases the light absorbing capacity
How is Grana similar to mitochondrion?
Similar to infolding of cell membrane for photosynthetic pigments in some bacteria
what is lamellae?
Membrane which join the grana to one another
what is the stroma?
- equivalent to cytoplasm
- contains photosynthetic enzymes for the light independent reaction
is the stroma similar mitochondrian?
yes, similar to mitochondria and photosynthetic bacteria
