Transcript Ch 8 Photosynthesis

1 Review What is ATP and what is its role in the cell”
Explain How does the structure of ATP make it an
ideal source of energy for the cell
Use Analogies Explain how ADP and ATP are each like
a battery. Which one is partially charged and which
one is fully charged- why?
2 Review What is the ultimate source of energy for
plants
Explain How do heterotrophs obtain energy? How is
this different from autotrophs?
3 Interdependence Recall that energy flows and
nutrient cycles through the biosphere. How does the
process of photosynthesis impact both the flow of
energy and the cycling of nutrients?
CH 8 PHOTOSYNTHESIS
8.1 Energy and Life
Chemical Energy

Energy
 The


ability to do work
Your cells are always working- building,
contracting, transporting
If you can’t get and use energy you die.
ATP




Adenosine TriPhosphate
Small usable packet of energy
Your body/cells use whenever they need energy for
various functions
High Energy.
ADP





Adenosine DiPhosphate
Two phosphate molecules
Used up version of ATP
Low energy
Can be turned back into ATP by adding a
phosphate and energy to hook it back on.
Storing Energy



Cells store small amounts
of energy by adding a
phosphate to ADP
Cells release small amounts
of energy by removing the
third phosphate of ATP
ATP and ADP are like a
rechargeable batteries.
Using Biochemical Energy
Storing Energy



ATP isn’t good at long
term energy storage
Only small amounts are
kept
ATP can be regenerated
by using energy in
glucose.

Heterotrophs
 Obtain

food by consuming other living things
Autotrophs
 Organisms

that make their own food
Photosynthesis
 Process
of autotrophs of converting light energy into
chemical energy.