Download PHOTOSYNTHESIS (Plant Nutrition)

PHOTOSYNTHESIS (Plant Nutrition)
= Capturing & transferring the energy of sunlight into _______________ energy
AUTOTROPHS (vs. Heterotrophs)
Ex. Green plants, MANY protists (algae), some bacteria
PHOTOSYNTHETIC PIGMENTS
_________________ – most abundant & important photosynthetic pigments
2 types found in plants  Both types ABSORB ______________ & _____________
and REFLECT _______________ so plants do not grow well in ___________ light
Chlorophyll a – is the primary photosynthetic
pigment directly involved in converting light energy
to chemical energy
CHLOROPLASTS = site of
____________________
_____________ = stacks of photosynthetic
__________________  These membranes
contain the photosynthetic pigments (Ex.
Chlorophyll)
_____________ = protein-containing material that
fills rest of chloroplast
CHEMISTRY of PHOTOSYNTHESIS  2 TYPES of REACTIONS
1. Light-Dependent – take place in the ___________ in the presence of light
These reactions produce high energy compounds  _____& ______
Light reactions take place in the ____________
2. Light-Independent = Dark Reactions = Calvin Cycle – use this energy to make
_______________ Dark reactions take place in the ____________
LIGHT-DEPENDENT REACTIONS
PHOTOLYSIS Water is split by _______________ acting on the pigment
____________ in the _______________ . Electrons are released and used to create
high energy Compounds  ATP, NADPH
O2 is also released.
light
O2 to atmosphere
energy
H2O
from soil
ATP to dark reactions
2. LIGHT-INDEPENDENT REACTIONS (“Dark Reactions”)
Energy for the dark reactions is provided by ______ from the light reactions
CO2 from the atmosphere enters the leaves through ____________. These are tiny
holes controlled by specialized cells called _____________cells.
CO2 enters the stroma, where carbon fixation occurs through many enzymecontrolled reactions called the Calvin Cycle. Glucose is produced.
ATP from
light reactions
CO2
from
atmosphere
Summary of Photosynthesis
Glucose !!