Photosynthesis and Respiration (Topic 5A) Flashcards
chloroplasts contain ___ pigments
three
pigments in chloroplasts absorb….
light energy
pigments in chloroplasts are attached to…
proteins
protein and pigments in chloroplast are called..
photosystems
stroma is a ___ like substance surrounding the ____ and contains ____ , ____ and ____ ___
- gel
- thylakoid
- enzymes, sugars and organic acids
any carbohydrates that aren’t used in straight away are stored as….
starch grains
where are starch grains found?
stroma
the first step of the light dependent reaction is…
light energy excites electrons in chlorophyll
the second step of the light dependent reaction is…
photolysis of water produces protons, electrons and O2
the third step of the light dependent reaction is…
energy from excited electrons makes ATP
the fourth step of the light dependent reaction is…
energy from the excited electrons generates reduced NADP
what does non-cyclic phosphorylation produce?
ATP, reduced NADP and O2
which photosystem is involved in non-cyclic phosphorylation?
1 and 2
which photosystem is involved in cyclic phosphorylation?
photosystem 1
what does cyclic phosphorylation produce?
produces ATP
the first step of the light independent reaction is…
CO2 diffuses into leaf and dissolved in water around mesophyll cells and diffuses into the stomata
the second step of the light independent reaction is…
CO2 combines to RuBP to form 2 molecules of GP, this is catalysed my rubisco enzyme
the third step of the light independent reaction is…
GP is reduced and activated to form TP. ATP & rescued NADP provide energy for this. The ADP, Pi and NADP return to thylakoid membrane
the fourth step of the light independent reaction is…
most of the TP continues through a series of reactions to regenerate RuBP and complete the cycle. NADP is reformed
to make a single hexose sugar _ ___ molecules are required
2 TP
it takes __ turns to form hexose sugar
6
__ new TP molecules are formed every _ turns
2
6
TP stands for
triose phosphate
the three pigments in chloroplasts are
chlorophyll (a)
chlorophyll (b)
carotene