Lab 7: Photosynthesis Flashcards
What is the end product of photosynthesis
glucose
CO2 is converted into a stable organic compound through a process known as
carbon fixation
what is the first step of photosynthesis
light reactions
what is the second step of photosynthesis
dark reactions
what pigment does photosystem I work best in
P700
what pigment does photosystem II work best in
P680
what kind of process is photosynthesis?
anabolic
When leaf pigments absorb light, electrons are boosted to a higher energy level, providing energy to:
produce ATP and NADP
Large complexes of proteins and pigments (light-absorbing molecules) that are optimized to harvest light are called:
photosystems
What is the chemical equation for photosynthesis?
6CO2 + 6H2O + light —> C6H12O6 + 6O2
What will happen in the experiment when light hits the chloroplasts?
- DPIP will be reduced
- DPIP will change from blue to colorless
- there will be an increase in light transmittance
During the dark reactions, atmospheric carbon dioxide (CO2) is brought into the leaf through tiny pores called: __________
stomata
is an important anabolic pathway that uses atmospheric carbon dioxide, water, and light energy to generate glucose and oxygen.
photosynthesis
photons of light within the visible range of the electromagnetic spectrum strike a group
of pigments housed in a “photosystem.”
light reactions
what happens in light dependent reactions?
water breaks down releasing electrons
they then move through photosystems and ETC
At the end of the 2nd ETC they pass onto NADP making NADPH
where is the H concentrated gradient located
thylakoid membrane
H+ is ultimately allowed to diffuse back across the membrane back into the stroma by what?
the facilitation of the enzyme ATP synthase.
what is used to power the ATP synthase pump?
H+ flow
what is used to power dark reactions
NADPH and ATP
what is another word for dark reactions?
light -independent reactions
Calvin-Benson cycle
carbon dioxide (CO2) is brought into the leaf through tiny pores called stomata and converted into
a stable organic compound in a process known as
carbon fixation
how is glucose made by dark reactions
the carbon compound is phosphorylated and converted to glucose.
what happens in dark reactions
in the dark carbon dioxide is brought to the leaf to be converted into a compound that is phosphorylated and converted to glucose.
