Download Photosynthesis and Cellular Respiration

Photosynthesis
and Cellular
Respiration
Shivani Patel
The Photosynthesis Equation
Cellular Respiration Equation
Notice Anything?
 The
photosynthesis equation is the cellular
respiration equation, but backwards.
 Photosynthesis makes the sugar.
 Through cellular respiration, we turn in
into energy.
 All living things contain a form of glucose
also known as sweet sugar.
 “Glu” means sweet
 “Cose” means sugar
Light
Light is important. Very important.
 Light is a form of electromagnetic
energy.
 Green light is reflected.
 Red and blue are mainly absorbed.
 Primary colors are green, red, and blue.
NOT yellow, magenta (red), and cyan
(blue).
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Chloroplast and Chlorophyll
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Chloroplast has an
important role.
It has chlorophyll that
capture’s the sun’s rays.
Inside chloroplasts are
thylakoids that are disclike.
They trap the sun’s rays.
Chlorophyll is a
chemical found inside
the chloroplast giving its
green pigment.
Process of Photosynthesis
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It doesn’t happen overnight.
There are 2 main steps.
First- light dependent reaction (Calvin cycle)
It turns light into ATP
Second- light independent reaction– it
doesn’t necessarily mean that it happens at
night.
It happens when ATP is turned into glucose.
Cellular Respiration
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How living organisms turn glucose into energy
There are byproducts like water and carbon
dioxide.
Carbon dioxide is a waste.
CO2 mixes with water helping maintaining
the blood’s pH (around 7.5).
Too much carbon dioxide causes to pH to
lower, so CO2 has to leave on a continuous
process.
Footnotes
 Glucose:
A simple, 6 carbon sugar that
serves as the primary energy source
 ATP (Adenosine triphosphate): The major
energy currency of the cell.
 NADH and FADH2: High energy electron
carrier used to transport electrons
generated in Glycolysis and Krebs Cycle
to the Electron Transport Chain.
Stages of Cellular Respiration
Glycolysis
 Fermentation (ONLY FOR ANAEROBIC
CELLULAR RESPIRATION)
 Krebs's Cycle A.K.A. Citric Acid Cycle
 Electron Transport Chain

Glycolysis
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The first stage is glycolysis in aerobic and
anaerobic cellular respiration.
An easy way to think about it is splitting
sugars.
It occurs in the cytoplasm.
It breaks glucose down to two pyruvic acid
or pyruvate. This stage doesn’t require
oxygen.
This stage requires 2 ATP and produces 4 ATP.
Fermentation
 Aerobic?
 Anaerobic?
 Fermentation
takes NADH to produce
NAD+.
 This stage makes nothing, no energy or
ATP.
Krebs's Cycle A.K.A. Citric Acid
Cycle
 This
step uses the pyruvic made in the
glycolysis stage.
 It produces ATP and several molecules of
NADH AND FADH2.
 This stage produces 2 ATP.
Electron Transport Chain
 The
chain is made using FADH2 AND
NADH (made in the previous cycles).
 The electron transport chain makes a
proton gradient that makes the
production of 34 ATP.
 It takes place in the mitochondria matrix.
Review
By the way, Cellular Respiration produces a total of
38 ATP.