Lab 7 Cellular Respiration Flashcards
What are the substrates (reactants) for cellular respiration?
C6H12O6 + 6O2
glucose + molecular oxygen
What are the products of cellular respiration?
6H2O + 6CO2
water + carbon dioxide
Where do the substrates for cellular respiration come from?
Photosynthesis - food energy (glucose) comes from plants by taking in light energy from the sun which causes photosynthesis to occur which produces glucose.
What is the final electron and H+ acceptor through the process of cellular respiration?
O2 (oxygen gas)
What is the chemical equation for cellular respiration?
C6H12O6 + 6O2 —> 6H2O + 6CO2
How many ATP molecules can cellular respiration make?
38 ATP molecules
What is the main purpose of any form of respiration?
The reconstruction of Adenosine Triphosphate (ATP)
What happens when ATP loses a phosphate?
It becomes ADP (Adenosine Diphosphate)
What is the energy carrier of the cell?
ATP
What are the pathways of Aerobic Respiration (3)?
Glycolysis, Krebs Cycle, and Electron Transport Chain
Where does glycolysis in aerobic respiration occur?
In the cytoplasm of the cell.
Where does the krebs cycle in aerobic respiration occur?
In the matrix of the mitochondria
Where does the electron transport chain in aerobic respiration occur?
Along the cristae of the mitochondria
What is the method of breaking down glucose without oxygen?
Anaerobic Respiration
What are the 2 types of anaerobic respiration that occurs after glycolysis is complete and if no O2 is available?
Lactic Acid Fermentation and Alcohol Fermentation
What happens with lactic acid fermentation?
Pyruvate is converted to lactic acid
What happens with alcoholic fermentation?
Pyruvate is converted into ethanol
How many ATP is produced with the 2 types of anaerobic respiration?
net gain of 2 ATP molecules
What molecule is being broken down to produce CO2 during fermentation?
Glucose
In lab 7 (Cellular Respiration), how did the fermentation rate of glucose, sucrose, and starch compare?
Glucose was the fastest, sucrose was the second fastest, and starch was the slowest.
Cellular respiration is controlled by enzymes, so if you lowered the temperature would you expect a different rate of production? Would the difference be a lower rate or increased rate?
Yes, lower rate.
