Respiration Flashcards
Respiration
Release of energy from food using enzymes
Respiration equation
C6H12O12 + 6O2 = 6H2O + 6CO2
Stage 1
Glucose is broken down into pyruvic acid/ energy is released/ ATP is produced from ADP and P/ NADH is formed/ from NAD+ , electrons and protons
Where does Stage 1 occur?
Cytosol, anaerobic, releases very little energy.
Where does Stage 2 occur?
Mitochondria, aerobic, releases a lot of energy.
Role of NAD in stage 2
Picks up protons and electrons/ To form NADH/ These protons and electrons combine with O2/ To form water.
Aerobic
Requires oxygen
Anaerobic
Doesn’t Require Oxygen
NAD
Nicotinamide adenine dinucleotide
Events in the electron transport system
High energy electrons/ pass along carriers/ lose energy/ to form ATP/ from ADP and P / electrons combine with H+ and O2/ to form water.
Advantage of Cell using ATP as energy
Easily release/ Easily recycled.
Krebs cycle products
ATP/CO2/NADH//H+
ATP fate
Releases energy
CO2 fate
Used in photosynthesis
NADH fate
Releases electrons
H+ fate
Forms water
Final electron acceptor in aerobic respiration
O2
Stage 2
Pyruvic acid moves into the mitochondrion/ coverts to acetyl co-enzyme A/ enters Kreb cycle
Krebs Cycle
Acetyl co enzyme A broken down/ to form CO2 and H2O/ Energy high electrons released/ to combine with NADH+/ to form NADH/ ADP to ATP.
Bioreactor
Vessel in which cells/ enzymes produce useful products.
