ch9 exam 3 Flashcards
(33 cards)
What is photosynthesis?
Light energy is converted to
chemical energy stored in glucose
What is the summary reaction for photosynthesis?
6CO2 + 6H2O → C6H12O6 + 6O2
What is the electromagnetic spectrum?
a vast, continuous range of radiation
What is a wavelength?
the distance from one wave peak to the next.
Which wavelengths of light have more energy? Which have less energy?
leastto most:
Radio waves
microwaves
infrared
visible
UV
X-rays
gamma rays
What is a photon?
Light is composed of small particles, or packets, of energy
Where does photosynthesis occur?
chloroplasts
What happens to an electron that gets struck by a photon?
the electron, being negative, will fly to the positive side
What is mesophyll?
The photosynthetic ground tissue of the leaf (houses chloroplast)
What is palisade mesophyll?
-upper epidermis
-cells are stacked closely together
-light capture
What is spongy mesophyll?
-the lower portion
-cells are loosely and irregularly arranged
-allows diffusion of gases(CO2)
What are stomata?
microscopic pores of leaf where gas exchange occurs
What are Grana?
Stacks of thylakoid sacs
What are thylakoids?
membrane of sacs that encloses a fluid-filled interior space
What is the stroma?
fluid inside the chloroplasts
(cytoplasm of the chloroplasts)
What is the primary photosynthetic pigment?
Chlorophyll
Where do the light dependent reactions occur?
thylakoids
Does photosynthesis involve an ETS?
yes
Where do the light independent reactions occur?
stroma
What is photosystem II?
ATP synthase uses Chemiosmosis tocreate ATP
What is photosystem I?
Produces NADPH to carry electrons to the calvin cycle (O2 by product)
What are the inputs and outputs of photosystems II and I?
II
input:
output:
I
input:
output:
What are alternate names for the light independent reactions?
Calvin cycle
What happens to CO2?
CO2 is used up and O2 accumulates
