Overview
Does the Krebs Cycle directly use oxygen?
No
Where does the Electron Transport Chain take place?
In the cristae or the inner membrane of the mitochondria
What is the difference between aerobic and anaerobic respiration?
Aerobic: In the presence of oxygen
Anaerobic: Not in the presence of oxygen
How is energy released from ATP?
A phosphate group breaks off from ATP and energy is released from that chemical bond
What is the starting molecule of glycolysis?
Glucose
What molecule enters the Krebs Cycle?
Acetyl-CoA
Does the Electron Transport Chain happen with or without oxygen?
With
In what organism does alcohol fermentation take place?
Yeast
Does glycolysis require the presence of oxygen?
No
Where does the Krebs Cycle take place?
In the mitochondrial matrix
What is the name of the membrane protein that helps hydrogen ions pass through the inner mitochondrial membrane during electron transfer phosphorylation and helps drive the production of ATP?
ATP Synthase
What is produced in muscle cells in the absence of oxygen that causes muscle fatigue?
Lactic Acid
What is the first step of cellular respiration
Glycolysis
How many ATP are required to start glycolysis?
2
Why does the Krebs cycle need to turn twice?
Both acetyl coA molecules have to enter the cycle
What is the role of oxygen in the Electron Transport Chain?
Oxygen accepts electrons (H+) to form 6 water (H2O) molecules
How many ATP molecules are made from lactic acid and alcoholic fermentation?
0 ATP from fermentation itself - The purpose is to regenerate NAD+
(2 ATP if you count glycolysis)
Cellular respiration occurs in three steps or stages. In which step or stage are the carbon atoms removed and released as carbon dioxide?
-The Krebs Cycle.
- Also half point for oxidation of pyruvate cause CO2 is released there too
What are the products of glycolysis?
The products are 2 pyruvate molecules, 2 net ATP and 2 NADH molecules.
What are the products of the Krebs Cycle?
6 CO2, 2 ATP, 8NADH, 2FADH2.
(Or 6 NADH and 4CO2 if you don't count the oxidation of pyruvate)
What is the role of NADH and FADH2 in the Electron Transport Chain?
NADH and FADH2 drop off electrons and hydrogen ions at the ETC.
What are the products of alcohol fermentation?
Alcohol, CO2