Hmmmm… When a consumer eats what are they getting? What do organisms use matter and energy...
Transcript of Hmmmm… When a consumer eats what are they getting? What do organisms use matter and energy...
Hmmmm…• When a consumer eats what are they getting?
• What do organisms use matter and energy for?(online 7.1 activity)
• How is putting chemical energy to work in a cell different than in an auto?
• How is the burning of a marshmallow different from eating the marshmallow? (online 7.2 activity)
• How is cellular respiration different from digestion?
• Cellular Respiration: The chemical process by which organisms use oxygen to convert the chemical energy stored in glucose into another form of chemical energy called ATP.
• ATP is then used to do cellular work(transport, mechanical, or chemical work)
Chapter 7 Cellular Respiration
• Balanced Chemical Equation:__________________________________• Reactants are: ____________________• Products are: _____________________• Three stages are:
1.2.3.
Stage 1: Glycolysis•Does not require ___________
•Occurs in _____________________ of cell
•Net gain of ______________
Stage 2: Kreb’s Cycle
Cytoplasm Mitochondria
Conversion of two pyruvic acid molecules to two acetyl CoA molecules yields:
___ CO2 and ___ NADH
Kreb’s Cycle Yield per acetyl CoA
• ___ carbon atoms added from acetyl CoA• ___ carbon atoms removed as ______• ___ NAD+ converted to _____ NADH• ___ FAD converted to ____ FADH2
• ___ ADP converted to ___ ATP
X 2 for each acetyl CoA is a result of
___ NADH, ___ FADH2, and ___ ATP
Stage 3: ETC and ATP Synthase
ETC and ATP Synthase1. Electrons from NADH and FADH2 pass along ETC
(series of molecules)2. Some energy from electrons used to power pump that
moves H+ out of inner mitochondria membrane (active transport)
3. Oxygen accepts pair of electrons at end of ETC, combines with 2H+, creating water
4. H+ diffuse (passive transport) through ATP synthase into mitochondria
5. ATP synthase generates ATP, ADP + P ATP
**How many ATP molecules are made from one glucose molecule?
Glucose
2 G3P
ATP Production per Molecule of Glucose
Gross ___ ATP
Net ___ ATP
~63% of energy in glucose molecule lost as heat