1. Agenda 9/20 Lab Recap Cellular respiration review
Cellular respiration quiz
Turn in: IA data tables, cell resp concept map

2. Lab Recap
Purpose: determine the rate of cellular respiration (mL O2/min) in germinating peas, non germinating peas, and glass beads in a respirometer
We need KOH- why?
What gas was consumed? What gas was produced?

3. Sample Data
Graph the volume of O2 consumed vs time for the germinating seeds
First have to determine change in volume for each time point (mL of O2 consumed)
Calculate the slope of that line- what does this represent?

4. Lab Recap Slope of line= rate
mL of O2/min
Temperature can influence the rate of cellular respiration
As temperature increases, the molecules move faster, meaning they react more frequently
BUT if temperature gets too hot, the enzymes get denatured and cellular respiration will not function (no ATPase=no cellular respiration)
Cold temperatures would decrease the rate since molecules are moving slower
What other factors could influence the rate of cellular respiration?

5. Cellular Respiration Overview

6. Glycolysis Glucose is broken into pyruvate 4 ATP molecules are made
It takes 2 ATP molecules to break glucose apart
4 ATP molecules are made
NET of 2 ATP

7. Kreb’s Cycle Pyruvateacetyl-coA
Acetyl-coA gets broken into a lot of different molecules
CO2 produced
NADH and FADH2 produced
2 ATPs produced

8. Electron Transport Chain
NADH/FADH2 carry electrons to the membrane of the mitochondria
The electrons flow through proteins in the membrane, being pulled by oxygen, which is the final electron acceptor
As the electrons flow through the membrane, it forces H+ ions outside of the membrane
The H+ ions must flow back inside the membrane
They flow through ATP synthase, which causes the enzymes to turn, and ATP is made
This process is called chemiosmosis

9. Electron Transport Chain