2. What is Bioenergetics?
The study of
energy in living
systems
(environments)
and the
organisms
(plants and
animals) that
utilize them
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7. Endergonic Reactions
Chemical reaction that
requires a net input of
energy.
Photosynthesis
6CO2+ 6H2O C6H12O6 + 6O2
SUN
photons
Light
Energy
(glucose)
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8. Exergonic Reactions
Chemical reactions that
releases energy
Cellular Respiration
C6H12O6 + 6O2 6CO2 + 6H2O+ ATP
(glucose)
Energy
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10. What is Metabolism?
The sum total
of the
chemical
activities of
all cells.
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11. Two Types of Metabolism
Anabolic
Pathways
Catabolic
Pathways
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12. Anabolic Pathway
Metabolic reactions, which
consume energy (endergonic), to
build complicated molecules from
simpler compounds.
Photosynthesis
6CO2 + 6H2O C6H12O6 + 6O2
SUN
light
energy
(glucose)
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13. Catabolic Pathway
Metabolic reactions which release
energy (exergonic) by breaking
down complex molecules in simpler
compounds
Cellular Respiration
C6H12O6 + 6O2 6CO2 + 6H2O + ATP
(glucose)
energy
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15. ATP
Components:
1. adenine: nitrogenous base
2. ribose: five carbon sugar
3.phosphate group: chain of 3
ribose
adenine
P P P
phosphate group
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17. Breaking the Bonds of ATP
Process is called
phosphorylation
Occurs continually
in cells
Enzyme ATP-ase
can weaken &
break last PO4
bond releasing
energy & free PO4
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18. How does ATP work ?
Organisms use enzymes to
break down energy-rich
glucose to release its
potential energy
This energy is trapped and
stored in the form of
adenosine triphosphate(ATP)
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19. How Much ATP Do Cells Use?
It is estimated
that each cell
will generate
and consume
approximately
10,000,000
molecules of
ATP per second
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20. Coupled Reaction - ATP
The exergonic
hydrolysis of ATP
is coupled with
the endergonic
dehydration
process by
transferring a
phosphate group
to another
molecule.
H2O
H2O
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21. Hydrolysis of ATP
ATP + H2O ADP + P
(exergonic)
Hydrolysis
(add water)
P P P
Adenosine triphosphate (ATP)
P P P
+
Adenosine diphosphate (ADP)
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23. Dehydration of ATP
ADP + P ATP + H2O
(endergonic)
P P P
Adenosine triphosphate (ATP)
P P P
+
Adenosine diphosphate (ADP)
Dehydration
(Remove H2O
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26. How many high energy
phosphate bonds does ATP
have?
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27. Which is true of photosyntheis?
Anabolic or Catabolic
Exergonic Or Endergonic
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28. The breakdown of ATP is
due to:
Dehydration or Hydrolysis
H2O added or H2O removed
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29. Which Reactions are often
Coupled in Organisms
Hydrolysis or Dehydration
Anabolism or Catabolism
Endergonic or Exergonic
BOTH
BOTH
BOTH
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30. Ready for the test?
If not, review and
try again!!!
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