Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
35 Cards in this Set
- Front
- Back
|
Photoautotrophs |
use the energy of light toproduce organic molecules. - Feed us, clothe us, house, provide energy |
|
|
Mesophyll |
Green tissue interior of leaf that contain cholorplasts |
|
|
Stomata |
Tiny pores in the leaf that allow CO2 to enter and Oxygen to leave |
|
|
Stroma |
Fluid in the cholorplasts |
|
|
Thylakoids |
system of interconnected membranous sacs, where similair to mitochondria |
|
|
Grana |
Stacks of thylakoids |
|
|
Where does oxygen produced in photosynthesis come from? |
From water |
|
|
What kind of reaction is photosynthesis? |
It's redox, and it's endergonic |
|
|
What happens to CO2? |
It is reduced to sugar as electrons, with H+ ions from water |
|
|
What happens to water? |
It is oxidized when it loses electrons along with hydrogen ions |
|
|
What happens to electrons as they move down the ETC? |
Electrons gain potential |
|
|
Where do light dependent reactions occur? |
In the thylakoid membrane |
|
|
Where does the Calvin Cycle occur? Does it need light? |
In the stroma and it is light independent |
|
|
Carbon Fixation |
CO2 is incorporated into a 3 carbon compound |
|
|
Photon |
fixed quantity of light energy |
|
|
Wavelenth |
The distance between the crests of 2 adjacent waves. The shorter the wavelength, the greater the energy |
|
|
Chlorophyll A absorbs |
Blue- violet and red light |
|
|
Chlorophyll B absorbs |
Blue and Orange light |
|
|
What do pigments in chloroplasts do? |
Absorb photons, increase potential energy of electrons put the electrons in an unstable state |
|
|
Photosystem |
Made up of light-harvesting complexes surrounding a reaction center complex |
|
|
Light harvesting complexes |
Function as light-gathering antenna, contain pigment |
|
|
How is light energy transformed into ATP and NADPH |
Electrons are removed from water and passed through photosystems 1+2, accepted by NAD+ |
|
|
How do electrons move from Photosystem II to Photosystem I? |
Through the ETC |
|
|
photophosphorylation |
Chemiosmotic produciton of ATP |
|
|
What is G3P used for? |
to make glucose, sucrose (disaccharide) |
|
|
Steps of the Calvin Cycle |
Carbon fixation, Reduction, release of 1 G3P, regeneration of RuBP |
|
|
Carbon Fixation occurs when |
whenthe enzyme rubisco adds CO2 to RuBP |
|
|
C3 plants |
Plants that produce the 3 Carbon compound 3-PGA |
|
|
Photorespiration |
occurs in the light, consumes O2 and releases CO2, uses ATP instead of producing it Rubisco adds O2 instead of CO2 to RuBP |
|
|
C4 Plants |
Fix CO2 into a 4 carbon compound |
|
|
CAM plants |
Open their stomata and admit CO2 only at night, fix into a 4 carbon compound |
|
|
6-PGA to 6 G3P |
ATP is spent and NADH is oxidized to NAD+ |
|
|
3 CO2 to 6PGA |
Rubisco combines CO2 with RuBP that results in 6 PGA |
|
|
How many G3P (net) are produced for every 3 CO2? |
1, the other 5 remain in the cycle. |
|
|
5 G3P to 3 RuBP |
ATP is spent rearranging the 5 remaining G3P molecules into 3 RuBP |
