Name __________________________________________ Date ___________________ Period ________
CELLULAR RESPIRATION REVIEW
Directions: Use your notes, your brain, your friends or your enemies to fill in the blanks!
Part I. _________________
The overall goal of this first part of cellular respiration is to _____________ sugar into two
_____________. It is carried out in the ______________. Glucose has _________ carbons, so each
_____________ will have three. The first step is to add a molecule of _______________ to one side of
glucose. This makes glucose very ___________. To add insult to injury, we then add another
_______________ to the other side. By now, glucose is very, very, very ______________, and it
___________ in half. However, we have used two ___________, and not made any. During the next stage,
the carbons in the three-carbon molecule are _________________. This process gains __________ ATPs,
for a net gain of ___________ ATPs. We also gain two molecules of __________, which is an electron
carrier.
Part II. ______________________
The overall goal of this part of cellular respiration is to make ______________ compounds. Two
examples are _______________ and _____________. These start out as ___________ and __________.
This process is carried out in the mitochondrial _____________. Mr. Syracuse once saw a _____________
movie of the same name which had very little biology in it at all. The first step is to take a molecule of
___________ off of pyruvate, leaving it with two carbons. Then, a molecule of CoA is added, making
________________. This two-carbon molecule enters the Krebs cycle and is added to _________________,
a four-carbon compound. This creates citric acid, a ___________-carbon compound. Another molecule of
carbon dioxide is taken away, leaving __________ carbons, and a molecule of __________ is reduced to
___________. This process is repeated again, leaving ____________ carbons, and yielding another
____________. Next, a molecule of ADP is phosphorylated to _________. We rearrange this four-carbon
compound to reduced yet another molecule of _________ to ___________. Lastly, one more rearrangement
reduces this electron carrier (a different one!) ____________ to __________. At last, we have regenerated
_________________, the four-carbon compound to which we add acetyl CoA. This is necessary if we want
the ____________ to continue. The Krebs cycle must turn ________ times per glucose, because each
glucose yields ___________ pyruvates.
Part III. ______________________________
The goal of this part of respiration is to make copious amounts of ____________. This part of
respiration takes place right on the inner ___________________. The way we make this ATP is by making a
_______________ gradient. The electron carriers (_________ and ___________) drop off their electrons at
the first protein of the ETC. The next protein in line is more ___________________, meaning it likes
electrons more, so it steals the electron from the first protein. This causes a ______________ to be pumped
into the ___________________________. The next protein is even more __________________, so it steals
the electron, pumping another proton across. The final protein needs a place to drop off its electron, but
there are no more proteins! So, _______________ acts as the final electron acceptor. It then combines with
hydrogen to make _____________. So far, no ATP has been made, though. We have made a gradient of
_____________, however. Just like a waterfall, these protons go from an area of ____________
concentration to ____________ concentration. The only way for them to get there, however, is through an
enzyme called ______________________. They go through this enzyme, which spins, and slaps a
________________ onto ADP to make ___________. This makes all the ATP that you could ever want!