module 5 - cell energy Flashcards
photosynthesis involves
light and gas exchange
where does photosynthesis occur?
chloroplasts
what 2 pathways involves photosynthesis?
light reactions and carbon-fixation reactions
light reactions
convert light energy into chemical energy in form of ATP and NADPH
carbon-fixation reactions (light-independent reactions)
use ATP, NADPH and CO2 to produce carbs
where does light reactions take place in
thylakoid membrane
where does carbon-fixation reactions take place in
stroma
pigments
molecules that absorb wavelength in visible spectrum
light energy is _______ by pigments in photosynthesis
absorbed
what is light
form of electromagnetic radiation
photons
particles of light
light energy is ________ by molecules
absorbed
each pigment absorbs _____ ?
specific wavelengths
what does chlorophyll’s structure allow?
absorb energy from light
chlorophyll pigments are arranged in
photosystems
photosystem
complex of proteins and pigments in the thylakoid membrane
2 parts of photosystem
antenna system and reaction center
what do light reactions of photosynthesis lead to
ATP, NADPH and O2
how does photosynthesis generate organic molecules?
ATP and NADPH
how does carbon fixation into sugar?
use ATP and NADPH to convert CO2
what does light stimulate?
Calvin cycle
why does chloroplasts and mitochondria collaborate?
supply cells with metabolites and ATP un plant cells
what are examples of rich stores of starch and fats
corn and nuts and peas
enzymes are
catalysts
