Compare (and contrast) the process of photosynthesis to cellular
respiration in terms of the following:
 the initial source of energy that is input into the process
Cellular Respiration
Photosynthesis
Energy stored in the
EM radiation in the form of
glucose molecule bonds
visible light from the sun
 any other inputs
Cellular Respiration
Photosynthesis
O2 (oxygen) from the air
H2O from xylem and CO2
from air (in from the stoma)
 the role of ATP in the overall process
Cellular Respiration
Photosynthesis
ATP generation is the goal ATP is generated in the light
of cellular respiration; use 2 dependent reactions and is
ATP needed to start the
used in the Calvin Cycle
process of glycolysis
(light dependent reaction) to
(eventually) make glucose
from G3P
 the role of the ETC’s
Cellular Respiration
The electron’s move down
the ETC in the inner
membrane and drive H+
into the intermembrane
space, creating a [H+]
concentration gradient, the
H+ will then go through
Photosynthesis
The electron’s move down the
ETC in the thylakoid
membrane and drive H+ into
the middle of the thylakoid,
creating a [H+] concentration
gradient, the H+ will then go
through facilitated diffusion
facilitated diffusion through
ATP synthase to generate
ATP (as the H+ move into
the matrix of the
mitochondria). ETC is vital
to creating the
concentration gradient that
drives ATP synthesis.
through ATP synthase to
generate ATP (as H+ move
into the stroma). ETC is vital
to creating the concentration
gradient that drives ATP
synthesis.
 the role of H+ ions and where the hydrogen atoms
eventually end up
Cellular Respiration
Photosynthesis
H+ ions are activity
H+ ions are activity
transported out of the
transported into the middle of
matrix into the
the thylakoid when electrons
intermembrane space when fall in the ETC, then their
electrons fall in the ETC,
concentration gradient drive
then their concentration
them back out into the stroma
gradient drive them back
via facilitated diffusion
into the matrix via
through ATP synthase,
facilitated diffusion through generating a lot of ATP as
ATP synthase, generating a they diffuse back into the
lot of ATP as they diffuse stroma.
back into the matrix.
H+ end up in water
molecule.
H+ eventually end up in
glucose.
 the location in the cell/organelles/membranes where ATP
production takes place
Cellular Respiration
Photosynthesis
Glycolysis – cytoplasm
Kreb’s cycle –
mitochondrial matrix
ETC – inner membrane of
the mitochondria
 the byproducts
Cellular Respiration
CO2 made during link
reaction, and Kreb’s cycle
Light dependent reaction – in
the thylakoid membrane
Photosynthesis
O2 is formed when water
splits to donate electrons lost
by the pigment molecules.
H2O is made at the final
step of aerobic respiration
when Oxygen accepts low
energy electrons and H+
 how the structure of the organelle is related to the
function of the organelle involved in the process
Cellular Respiration
Photosynthesis
Mitochondria:
Chloroplasts:
Increased surface area of
Increased surface area of the
folding inner membrane to thylakoid membrane to
maximize available spots
maximize surface area of
for ETC and ATP synthase. pigments and ETC for light
dependent reactions.
Separate areas so you can
create a concentration
gradient.
Separate areas so you can
create a concentration
gradient
Contained area for enzymes
of certain reactions, eg
Kreb’s cycle only occurs in
the matrix
Contained area for enzymes
of specific reactions:
Calvin cycle only in the
stroma