plants
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function of chloroplasts
undergo photosynthesis to generate energy in forms of ATP
function of vacuoles
helps cell manage osmotic pressure
breakdown of mitochondrion
outer membrane inner membrane intermembrane space matrix space
components of chloroplast (6)
outer membrane inner membrane intermembrane space stroma thylakoid membrane thylakoid space
origin of chloroplasts
an early eukaryotic cell that possessed mitochondria engulfed a photosynthetic bacterium and retained it in symbiosis
symbiosis
close, long-term interaction between two different species living in direct association with one another
explain the electron transport chain (light reaction)
a photon of light knocks an electron out of a chlorophyll molecule which moves along the electron transport chain. part of the energy released by energy transfer is used to pump protons, creating a gradient across the thylakoid membrane, which is then used to drive ATP synthesis
explain the electron transport chain (dark reaction)
ATP and NADPH produced by light reaction drive the conversion of CO2 to carbohydrate in the stoma of chloroplast
cellulose is a ___ it forms ____ that are interwoven with ___ and ___ cross linked networks of ___ makes it ___ and ___
polysaccharide forms microfibrils that are interwoven with other polysaccharides and structural proteins cross linked network of lignin makes it more rigid and waterproof
turgor pressure and its function
as the result of an osmotic imbalance between the interior of the plant cell and its surroundings drives cell growth
where in plants is cellulose most abundant
cell wall
explain how ATP is synthesised in plants
proton gradient generated by the electron transfer during photosynthesis is harnessed by ATP synthase, which converts mechanical to chemical energy
explain how ATP synthase harnesses energy from the proton gradient
the proton gradient rotates the motor of the ATP synthase the rotational force provides energy to bind ADP with a phosphate group, producing an ATP molecule
where is ATP synthase found in cells
inner mitochondrial membrane and thylakoid membrane of chloroplasts
What cofactor is the electron donor for carbon fixation
NADPH