bio exam#2
In cellular respiration, glucose is _____ to CO2 and oxygen is _____ to water.
oxidized; reduced
Acetyl-CoA synthesis occurs during:
pyruvate oxidation
In pyruvate oxidation, the electron donor is _____ and the electron acceptor is _____
pyruvate; NAD+
An addition of electrons is referred to as...
reduction
In glycolysis, ATP is synthesized by
substrate-level phosphorylation
In eukaryotic cells, glycolysis occurs in
the cytoplasm
During the pyruvate oxidation stage of cellular respiration, what occurs?
the formation of NADH the oxidation of pyruvate the formation of acetyl-CoA the formation of CO2
Cellular respiration is a series of _____ reactions
catabolic
How many reactions in glycolysis directly generate ATP by substrate-level phosphorylation?
2
Tracing the metabolism of one glucose molecule, how many carbon atoms are fully oxidized to CO2 at the completion of glycolysis?
2
Tracing the metabolism of one glucose molecule, how many carbon atoms are fully oxidized to CO2 at the completion of the pyruvate oxidation stage?
4
When a single pyruvate is converted to acetyl-CoA during pyruvate oxidation, the other products of the reaction are...
CO2 and NADH.
In cellular respiration, oxygen
gains electrons and is reduced.
Pyruvate oxidation is an important stage in cellular respiration because:
it links glycolysis with the citric acid cycle
When a substance in a reaction is oxidized, it...
loses electrons
True or false the ATP produced during glycolysis is the result of substrate-level phosphorylation.
true
True or false when glucose is broken down in a cell, all of the energy it stores is not released simultaneously but is instead released in a stepwise process.
true
Although glycolysis produces four molecules of ATP, the net gain of ATP for the cell is two molecules. This is because...
two molecules are used in the initial stage.
Which of the following summarizes the net final products of glycolysis?
two molecules of pyruvate, two molecules of ATP, and two molecules of NADH
