respiration

Question 1

what is respiration

Answer 1

• using O2 to break down glucose to generate ATP

Question 2

respiration equation

Answer 2

C6H12O6 + O2 –> CO2 + H2O

Question 3

Glycolysis steps

Answer 3

1-3) glucose energized by ATP
4) 6 carbons from glucose split into two 3-carbon pyruvates
5) redox rxn generates 2NADH
6-9) 2ATP and pyruvate produced

Question 4

pyruvate oxidation steps

Answer 4

1) 3-carbon pyruvates energized by ATP
2) two 2-carbon acetyl coA remain
3) 2CO2 and 2NADH produced

Question 5

Kreb’s cycle steps

Answer 5

1) acetyl coA stokes the furnace
2-3) redox rxns generate ATP and NADH
4-6) further redox rxns generate FADH2 and more NADH
- at this point the glucose molecule is fully oxidized to CO2
- net gain of 24 hydrogens

Question 6

ETC steps

Answer 6

1-3) in the first 3 protein complexes, each oxygen accepts 2 electrons from the chain and picks up 2 hydrogens from the surrounding solution… water formed
4) in the 4th protein complex, 4 electrons are used to reduce a molecule of oxygen gas and form water

Question 7

Chemiosmosis steps

Answer 7

1) electrons harvested from glucose in ETC drive protons across membrane against their concentration gradients
2) the return of these protons by diffusion generates ATP