Lesson 11 photosynthesis Flashcards
photosynthesis
a complex chemical process that converts light into chemical energy in the form of sugar
photosynthesis eqn
6CO2 + 6H20 + (energy) → using light and chlorophyll C6H12O6 + 6O2+ 6water + energy
light reactions
photochemical, is fast and light dependent, splits water and occurs in the thylakoid
This creates current
make NADPH
dark reactions
biochemical and is slower, light independent fixes co2 to make sugar
Make NADP+
primary photosynthetic pigment
chlorophyll a and b and reflect green, absorb blue and red
is nonpolar and hydrophobic
accessory pigments
carotenes and xanthophyll reflect orange and yellow light
paper chromatography
separates pigments based on adsorbtion
spectroscope
instrument that separates white light into components
fluorescence
when electrons are excited, they release energy by falling back to original orbital and emit a photon of RED LIGHT
name the diagram
pg 144
chloroplast
organelle that is site for photosynthesis
light can be
transmitted: passes through object
reflected: bounces back
absorbed: material retains energy
mesophyll types
columnar mesophyll is the palisade
Most light capture occurs in the palisade
Loosely patched mesophyll is called spongey mesophyll
They contain the stomata that function for gas exchange
STRUCTURE OF chloroplast
outer membrane, stroma is thick fluid, thylakoids are disks, Grana are stacks of thylakoids
light travels as
energy packets called photons
fate of light
can be transmitted (passes through), can be reflected (bounces off) or absorbed (retains energy)
watch a quick video on photosynthesis
light enters thylakoid, this takes H20 and makes water. then it makes NADPH and ATP which goes to the Calvin cycle where CO2 is fixed. then this makes glucose that can be metabolized into starch
rf factor
distance moved by pigment over distance from pigment origin to solvent form
phenol red turns
yellow in the presence of CO2. when you add a plant to a yellow beaker, it turns red as the CO2 is removed!
iodine stains
starch
the aluminum foil covering the plant experiment
proves that the photochemical reaction was linked to the biochemical reaction
from the mutant plant (white in the middle)
it is proven that chlorophyll is needed for photosynthesis
sodium bicarbonate adds
CO2 to platns
small rF number
means more soluble pigment
