UNIT3 AOS2 Flashcards
What role does Rubisco play in photosynthesis?
Converting carbon-dioxide into longer carbon-based molecules
When oxygen isn’t available in cellular aerobic respiration what happens?
anaerobic respiration occurs
What benefits does cellular anaerobic respiration have?
Faster reaction
Fewer enzymes required
Why would Rubisco bind to oxygen instead of carbon dioxide?
Higher tempurature, bonds will loosen and active site will change shape, increasing affinity for O2
What is photorespiration?
A failure of Rubisco to complete the Calvin Cycle, because it acts as an oxygenase as well as a carboxylase
What are two c0-enzymes used in photosynthesis?
NADP(H)- moves H+ ions from grana to stroma
ATP- provides energy for formation of glucose
Where is carbon fixation in C4 and CAM plants?
C4- mesophyll cells, day
CAM- mesophyll cells, night
Why is green light reflected?
Presence of chlorophyll, doe snot absorb green light it reflects it
What is the stomata?
Pores on a leaf surface allowing exchange of gases in and out of leaf
Why are biofuels renewable?
Made of biomass which can be replenished in a short time frame by natural processes
What is the relationship between glucose availability and rate of cellular respiration?
As glucose increases so does rate, until saturation point is reached and rate will plateau as all enzymes used in the reaction at at capacity. if glucose was absent, glycolysis would fail and cellular respiration would not occur
What are the outputs of anaerobic fermentation in animals and yeast?
Animals- 2 ATP and 2 Lactic acid
Yeast- 2 ATP, 2 CO2 and 2 Ethanol
Where does glycolysis occur?
Cytosol
Where does the Krebs cycle occur?
Mitochondrial Matrix
Where does the electron transport chain occur?
Cristae
