Science Starter #2 – 11/1/16
 Describe
the relationship between
photosynthesis and cellular
respiration.
 Write
the chemical equation of
photosynthesis and cellular respiration
Notes 4.1:
Energy, Life, and
Photosynthesis
Chapter 6
Pg. 113-115
Cellular Energy
 Cells
convert
carbohydrates into ATP
 ATP
(adenosine
triphosphate):
molecule used to
carry chemical energy
 Carries
bonds
energy in its
Cellular Energy, continued
 The
energy from ATP can power
different kinds of work in the
cell.
(a) Mechanical work
(b) Transport work
(c) Chemical work
Low concentration of solute
ADP + P
Chlamydomonas
ATP
ATP
ADP + P
ADP + P
ATP
Enzyme
Flagella
Substrates
Product
High concentration of solute
Figure 4.12
How does ATP Release
Energy?
 Energy
is released when the last phosphate
group is removed (bond is broken).
 ATP
becomes ADP
How does ADP become ATP?

Carbohydrates and other foods consumed by the
body contain energy.

When they are broken down, energy is released
and is used to reattach a phosphate to ADP,
turning it back into ATP.

Occurs in the mitochondria
ATP is like a Rechargeable Battery
Organisms Obtain Energy in
One of Two Ways
Heterotrophs
Organisms that must
consume others for
energy source
(glucose)
Autotrophs
Organism that creates
own energy source
(glucose) from
nonliving source
Chemosynthesis
Photosynthesis
Autotrophs
Chemosynthesis
Process of
converting inorganic
substances into
chemical energy.
Photosynthesis
Process of
converting light
energy into
chemical energy.
PHOTOSYNTHESIS OVERVIEW

CHLOROPLASTS
 Autotrophs
– like plants have
organelles called
chloroplasts
 Chloroplasts
carry out a
process called
photosynthesis
 Photo
– light
 Synthesis
– putting together
Chloroplasts

Chloroplasts contain:

Thylakoids

Grana

Stroma
Light and Pigments

Chloroplasts contain
pigments
 Pigments:

absorb light energy
Different colored pigments
absorb different colors of
light
 chlorophylls
- green
 Xanthophyll
- yellow
 carotene
– orange/red
Photosynthesis

Goal:
 Capture
energy from light
 Convert
light energy to chemical energy (ATP)
 Store
chemical energy
 Combine
(C6H12O6)
CO2 and H2O with ATP to make glucose
Photosynthesis equation


6CO2 + 6H2O
𝑆𝑢𝑛𝑙𝑖𝑔ℎ𝑡
Carbon Dioxide + Water
C6H12O6 + 6O2
𝑆𝑢𝑛𝑙𝑖𝑔ℎ𝑡
Glucose + Oxygen