The Living World 8th Edition by George Johnson

Exercise 2

The electrons generated from the Krebs cycle are transferred to ____________, which then carries them to _______________.
A) NADH, oxygen
B) NAD + , the electron transport chain
C) ATP, glycolysis
D) pyruvate, the electron transport chain
One of the initial substrates for the Krebs cycle is
A) oxaloacetate, a four-carbon sugar.
B) glyceraldehyde, a three-carbon sugar.
C) glucose, produced from the electron transport chain.
D) ATP, produced from the oxidation of pyruvate.
The electron carrier cytochrome c is one of many different cytochromes, but unlike the others, the sequence of cytochrome c is nearly identical in all species. Among humans, no genetic disorder affecting cytochrome c has ever been reported. Why do you suppose this is so?
Consider the structure of a mitochondrion. If you were to poke a hole in a mitochondrion, could it still perform oxidative respiration? Explain.