Aerobic
Respiration
Let’s look at what people think accounts for a tree’s mass…
Energy stored vs. Energy released

In photosynthesis, plants take energy from the
sun and STORE it in the bonds of glucose
 In
respiration, the energy in these glucose bonds
is RELEASED then made into ATP
 Thus,
photosynthesis and cellular respiration are
complementary processes necessary to the
survival of most organisms on Earth
Process
Where?
What do they
need to do this
process?
What do they
produce in the
process?
Photosynthesis
a. Light-dependent
reaction
b. Calvin cycle
Only Plants –
Chloroplasts:
Thylakoid and
stroma
CO2, Water,
Sunlight
Oxygen, glucose
Cellular Respiration
a. Glycolysis
b. Krebs cycle
c. Oxidative
phosphorylation
Plants/Humans/a Oxygen, glucose CO2, water,
nimals –
sunlight
Cytoplasm and
Mitochondria
Photosynthesis
Carbon dioxide + water + energy  Glucose + oxygen
(energy IN)
OPPOSITES
Aerobic Respiration
Glucose + oxygen  carbon dioxide + water + energy
(energy OUT)
Photosynthesis in a plant cell
Occurs in 2 main phases:
1.
2.
Light-dependent reaction (in thykaloid)
Calvin cycle (in stroma)
1. Light
dependent: is the
energy-capture
part which takes
place in the
thylakoid
membrane where
energy is
absorbed from
the sunlight
2.
1.
2. Calvin Cycle: Occurs in the stroma (space) where
the sunlight energy is used to combine CO2 and H2O
into glucose – energy is now stored in the bonds of a
glucose molecules as sucrose or starch.
Respiration
There are 3 parts steps in this reaction:
1.
2.
3.
Glycolysis
Krebs Cycle (or the citric acid cycle)
Oxidative phosphorylation
The end product of these 3 steps is 36
molecules of ATP per glucose
1. Glycolysis
 Gluco
(glucose) lysis (breakdown)
 Where: Cytoplasm
 What happens: Glucose breaks down to 2
pyruvate molecules (or pyruvic acid) which
then enters mitochondria
 What is produced: 2 ATP
2. Krebs Cycle
 Where:
Mitochondria
 What happens: Uses the product of
glycolysis 2 Pyruvates are broken down
by enzymes into carbon dioxide and
water.
 What is produced: 2 ATP are generated
3. Oxidative Phosphorylation &
the Electron Transport Chain



Where: Mitochondria
What happens: As glucose is broken down in
step 1 and 2, high energy electrons are
transferred to special electron carriers. These
electrons are passed to electron transport
proteins embedded in the inner membrane of
the mitochondria that use the energy of these
protons to make ATPs
What is produced: 32 ATP are generated for
each glucose