Name :___________________________________Date: _________Period : ________
Photosynthesis and Cell Respiration PPT Notes
Part I : Photosynthesis
•
Photosynthesis – is the process by which green plants ( autotrophs )
use _____________________CO2 and __________H2O in the presence of
__________________________from the sun and make ___________( glucose ).
•
_______________________= organisms that can make their own food.
•
_______________________= organisms that cannot make their own food and
must obtain their food from eating other organisms.
Who carries out photosynthesis ????
1.
2.
3.
Photosynthesis
Producers or autotrophs ( plants that contain
________________________) use the
_____________________from
_______________________to make sugars (glucose) from
carbon dioxide (CO2) and water (H2O) through a process
called photosynthesis.
This ________________(glucose) can be used immediately,
stored for later use, or used by other organisms such as
plants and animals.
Energy for life comes primarily from the ____________.
•
Photosynthesis is the connection between __________________that is released
from the sun (_________________energy ) and energy available for
food ( glucose – sugars ) (_________________energy).
•
Organic Molecules –
–
substances that contain________________; found
in____________________________;
–
•
Examples : nucleic acids ( DNA and RNA ) carbohydrates, lipids, proteins.
Inorganic Molecules –
-
substances that do NOT contain carbon; found
in__________________________.
-
Exceptions : CO ( carbon monoxide) and CO2 ( carbon dioxide ) are
inorganic molecules.
Photosynthesis
•
Photosynthesis is a ___________________reaction because it combines
simple molecules into more complex molecules
•
Photosynthesis is a ________________________(CO2) requiring process that
uses ________________(photons) and ____________(H2O) to produce
________________molecules.
•
Label the reaction below :
6CO2
+
6H2O 
C6H12O6 +
6O2
Reactants of Photosynthesis =
Products of Photosynthesis =
When does Photosynthesis take place ?
Photosynthesis usually takes place during the ______________________ .
Where does Photosynthesis take place ?
•
Photosynthesis occurs in the _____________of plants.
•
Photosynthesis occurs in the __________________of plant cells.
•
Chloroplasts – are organelles that contain ________________________
(the pigment molecule that absorbs sunlight energy) in green plants;
Why is Photosynthesis import ?
•
Plant cells use the glucose produced from photosynthesis in 2 ways :
•
1. Glucose ( sugar ) is used to generate ________________during
_____________________________where the glucose is broken down in the
___________________to release its stored energy.
•
2. Glucose is used as a material for ______________________more complex
molecules (___________________________ ) that the plant needs.
Structure of the Leaf of a Green Plant
Stomates ( Stomata )
Stomata are ____________________found on the _________________of leaves
through which __________(CO2 and O2) and ______________________are exchanged
between the plant and the atmosphere.
Photosynthesis occurs primarily in _____________________cells.
Chloroplast= organelle in plants where photosynthesis takes place.
The chloroplast is made up of three types of membrane:
•
A smooth ____________membrane
•
A smooth ____________membrane
•
A system of _________________membranes
_____________________are surrounded by a thick fluid called_______________.
__________________are stacks of thylakoids.
Why are plants green ?  Chlorophyll Pigments
•
Chlorophyll molecules are located on the __________________membranes
•
Chlorophyll pigments harvest light energy (photons) by ________________
certain wavelengths of light (________________________- are most important)
•
Plants are green because the _________________wavelengths of light are
_____________________not absorbed.
•
Absorption Spectrum for Chlorophyll
Which colors are absorbed ?
Which colors are reflected ?
During the fall what causes leaves to change color?
•
In addition to the chlorophyll pigments, there
are other pigments present
•
During the fall, the green _____________________pigments are greatly
________________revealing the other pigments
•
______________________are pigments that are either red, or orange.
•
______________________are pigments that are yellow.