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Biology EXAM 3
Terms in this set (58)
What is photosynthesis?
the change of solar energy to chemical energy
What depends on photosynthesis?
What does photosynthesis build? an out of what?
carbohydrates out of water and carbon dioxide
what is glucose used for?
half for plant's own fuel
manufacture other compounds
Where glucose stored?
starch or sucrose
What does photosynthesis?
provides energy and raw materials
produces oxygen essential for life
What is light?
visible light part of electromagnetic spectrum
what are protons?
unit of light energy
What is sunlight?
ultraviolet radiation, visible light, infrared radiation
What do photosynthetic pigments capture?
What is the primary photosynthetic pigment?
(absorbs: blue, red, violet)
What helps cholorphyll a?
How is color produced?
by reflecting the light
Does the color black reflect light?
No is absorbs all light
What is the main organ of photosynthesis?
the leaf of a plant
What enters and exits through the stomata?
CO2 and O2
What does leaf mesophyll contain?
What is the site of photosynthesis in a plant?
What is the structure of the chloroplasts?
2 membranes enclose stroma
What are the two stages of photosynthesis?
light reaction and C3 reaction
What is converted in the light reaction?
solar energy to chemical energy
Where does the light reaction occur?
What is produces in the light reaction?
ATP & NADPH
What is some other names for the C3 reaction?
What is converted in the C3 reaction?
uses chemical energy to convert CO2 to glucose
What two systems work together to make use of the sun light?
electron transport chain
what are the 2 types of photosynthesis?
Photosystem II (first)
Photosystem I (second)
What is made in Photosystem II?
electron transport chain make ATP
What is made in Photosystem I?
electron transport chain makes NADPH
What is the job of the pigment in photosystem II?
to get light energy absorbed and transferred to reaction center
What does photosystem II get from chlorophyll a?
What is released from the electrons in photosystem II?
energy that drives (H+) protons to active transport
What is chemiosmosis?
uses flow of H2 to change ADP to ATP
What does photosystem I need from photosystem II?
What is the source of electrons?
What does the C3 reaction produce?
Where does C3 reaction occur?
What does the C3 reaction use?
uses NADPH and ATP to reduce CO@
What are the 3 steps of the C3 reaction?
1 carbon fixation
2 PGAL synthesis
3 RuBP regeneration
What is carbon fixation?
inorganic carbon to organic carbon
What drives CO2 to join to RuBP?
What happens in the PGAL synthesis?
PGAL combined to form glucose
What happens in RuBP regeneration?
the regeneration of ATP and NADPH from light reaction
-must have some ATP and NADPH present to happen
What is the C3 pathway?
50 or more inches of rain a year \
-cool wet sensens
What pathway are 95% of plants?
What is photorespiration?
reduces efficiency of photosynthesis
What is used in photorespiration instead of CO2?
What does open stomata do in photorespiration?
minimizes water loss problem
What does close stomate do in photorespiration?
helps when there is a lack of CO2
What is the C4 pathway
-adapted to hot dry seasons
What happens in C4 pathway plants?
CO2 is stored and liberated
What is the CAM pathway?
open stomata to fix CO2 only at night
What must all cells have to survive?
What does glucose feeds?
autotrophs and other organisms
What are the 3 pathways for breaking down glucose?
1 aerobic respiration (O2)
2 anaerobic respiration (NO O2)
3. fermentation (NO O2) lactic acid production
Which pathway does plants use?
What are the 3 processes in cellular respiration?
1. glycolysis (2 ATP/ anaerobic)
2. Krebs cycle (2 ATP/ aerobic)
3. Electron transport chain ( 34 ATP/ aerobic)
Where does glycolysis happen?
prokaryotes- cytoplasm and cell membrane
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