Cellular Respiration

Question 1

What molecules are processed first?

Answer 1

Carbs

Question 2

Is ATP a product?

Answer 2

No, even though it is released

Question 3

Mitochondria

Answer 3

Where cellular respiration happens, inner membrane of folded membranes and matrix (fluid like substance) fills the space in the inner membrane

Question 4

Glycolysis

Answer 4

First stage of cellular respiration, breakdown of glucose, 10 step process of splitting 6-C glucose into 2 3-C pyruvate, happens in cytoplasm, no O2 necessary so anaerobic, net 2 ATP and 2NADH (glucose becomes 2 pyruvate + 4 ATP but 2ATP continues process)

Question 5

What is the same about aerobic and anaerobic respiration?

Answer 5

They both happen after glycolysis and obtain energy

Question 6

Aerobic respiration

Answer 6

Citric Acid Cycle/Krebs Cycle: makes NADH and FADH2 to move on to ETC, in mitochondrial matrix, 8 step process of chemical reactions where 2 pyruvate is chemically converted to 2ATP and minimal NADH and FADH2, CO2 waste product, pyruvate converted to acetylCoA that enters Krebs Cycle, NAD+ and FAD become NADH and FADH2 which carry e- to final step happens twice, total outcome is 8NADH + 2ATP + 2FADH2 + 6CO2
ETC/Oxidative phosphorylation/chemiosmosis: in cristae (inner wall of mitochondria), series of reactions using e- and H carried by NADH and FADH2 from Krebs Cycle, enzyme ATP synthase helps assemble ATP, O2 is the final e- acceptor after ETC, makes 34 ATP + H2O, most ATP from this step

Question 7

What kind of molecules are NADH and FADH2?

Answer 7

Electron carriers

Question 8

What does 1 pyruvate result in when it goes through the Citric Acid/Krebs Cycle?

Answer 8

4NADH, ATP, FADH2, 3CO2

Question 9

What is the H2O from the ETC of aerobic respiration made from?

Answer 9

H+ from proton gradient and e- from ETC bonding with O2 as final e- acceptor

Question 10

Anaerobic respiration/fermentation

Answer 10

When O2 absent, lactic acid and alcohol fermentation

Question 11

Lactic acid fermentation

Answer 11

In some bacteria and animal cells (like muscles), pyruvate becomes lactic acid + 2ATP

Question 12

Alcohol fermentation

Answer 12

In yeast when O2 absent, pyruvate broken into ethanol alcohol + CO2 + 2ATP

Question 13

Where is the pyruvate in all respiration from?

Answer 13

Glycolysis

Question 14

Aerobic respiration net ATP

Answer 14

36-38 ATP, 2 from glycolysis, 2 from Krebs, 34 from ETC

Question 15

Anaerobic respiration net ATP

Answer 15

2-4 ATP