chapter 7 : photosynthesis

cellular respiration

breaking down glucose

starches and cellulases are complex carbohydrates ( chains of glucose ) and sugars

Light dependent

• light is absorbed

• creates produces that turn on the light independent reaction

• takes energy to make sugar —> break sugar into usable bits of energy

photosynthesis equation

6 CO₂ + 6 H₂O —> C₆ H₂ O₂ + 6 O₂

_{carbon dioxide + water + light —> Glucose + oxygen}

stomata

little mouth, where plants breath

Stroma

similar to the cytoplasm, the inter portion of liquid

Thylakoid membrane

the little apartments where stuff happens ( the walls )

photons

pockets of light from the sun ( when light hits chloroplast it raises their energy rate )

Chlorophyll A

the one that many mainly absorb light

• absorbs mainly blue-violet and red light

• participates directly in the light reactions

Chlorophyll B

• used as support absorb extra energy and

• absorbs mainly blue and orange

• stores light

Carotenoids

takes the extra energy, spreading it out

causes leaves to change color

C3 plants

do photosynthesis all day long ( grape veins) stomata always open

C4 plants

does carbon and photosynthesis so has to partition when they do both, requires more energy but saves water tomatoes semi-open ( corn )

CAM plants

never open stomates because of extreme heat

don’t do photosynthesis during the day just absorb the light and do the gas exchanges at night

takes the most energy and the slowest growing ( desert plants )

make the photosythesis cycle