Cellular and Aerobic Respiration Flashcards

Flashcards for Cellular Respiration and Aerobic Respiration

Cellular Respiration

The process by which sugar is broken down to form ATP; can be aerobic (involves oxygen) or anaerobic (does not involve oxygen).

Aerobic Respiration

Cellular respiration with the presence of oxygen, involving glycolysis, formation of acetyl-CoA, Krebs cycle, and oxidative phosphorylation.

Aerobic Respiration Equation

Equation: C6H12O6 + 6O2 -> 6CO2 + 6H2O + ATP; involves glucose being broken down to make ATP.

Glycolysis

Splitting of glucose in the cytoplasm, yielding 2 pyruvic acids, 4 ATP, and 2 NADH; anaerobic and does not require oxygen.

Glycolysis Products

2 Pyruvic Acids, 4 ATP, 2 NADH

Krebs Cycle initiation

Acetyl CoA adds its 2 Carbon acetyl group to oxaloacetate (4 carbon) to produce citrate (6 carbon)

Products of Krebs Cycle per pyruvate

3 NADH + 1 FADH2 + 2 CO2

Intermediate Stage Location

The 2 pyruvates are transported into the mitochondria, specifically the mitochondrial matrix.

Pyruvate Dehydrogenase Complex (PDC)

Each pyruvic acid is converted into acetyl-coenzyme A (acetyl CoA) and CO2 is released. 2 NADHs are formed.

Krebs Cycle Step 1

Acetyl-CoA binds with oxaloacetate, a 4-carbon molecule, to form citric acid, a 6-carbon molecule (or citrate)

Krebs Cycle Step 2

Citrate is then broken down into 1 ATP, 3 NADH, 1 FADH, and Oxaloacetate

Link Reaction

Links glycolysis to the Krebs cycle only if oxygen is present

Pyruvate Dehydrogenase Complex Reaction

Pyruvate -> CO2 + acetate -> Acetyl-CoA

Products per pyruvate in Link reaction

1 Acetyl-CoA + 1 CO2 + 1 NADH