21 terms

Chapter 7: Photosynthesis

STUDY
PLAY
chloroplasts
parts of the plant that carry out photosynthesis
chlorophyll
light absorbing pigments
stomata
tiny pores on the bottom of leaves where carbon dioxide and oxygen are exchanged
stroma
thick fluid found inside chloroplasts
thylakoid
disk of pigment inside the chloroplast that absorbs light
grana
stack of thylakoids
light reactions
require light, break water into oxgyen, ADP to ATP, and NADP+ to NADPH
NADPH
electron carrier for photosynthesis
Calvin Cycle
"dark reactions", produces sugar from carbon dioxide
carbon fixation
taking carbon from the atmosphere and binding it to organic compounds
wavelength
distance between the crests of two adjacent waves
electromagnetic spectrum
full range of radiation: radiowaves, microwaves, infrared, visible light, ultraviolet, x-rays, and gamma rays
chlorophyll a
absorbs blue, violet, and red light
chlorophyll b
absorbs blue and orange light
photon
fixed quantity of energy, red have less energy then violet
photosystem
cluster of a few hundred pigments including chlorophylls a and b and carotenoids
reaction center
primary electron acceptor, pigment molcules, place of energy transfer
primary electron acceptor
traps the excited electron
c3 plants
make 3 carbon sugars instead of 6 carbon sugars, good for dry environments, because they conserve water, slow production
c4 plants
incorporate carbon dioxide into a 4 carbon compound before starting the Calvin cycle, allows for plants to grow without water in arid regions.
CAM plants
open stomata at night to allow CO2 and banks it for photosynthesis during the day