Micr 3033 Ch. 3 and 13 Tested Questions with Revised Answers | UPDATED!!!!
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Micr 3033 Ch. 3 and 13
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Micr 3033 Ch. 3 And 13
Micr 3033 Ch. 3 and 13 Tested Questions with Revised Answers | UPDATED!!!!
Describe briefly the three stages of cellular metabolism that lead from food to waste products in animals cells. - Answer-
The figure above illustrates the coupling of a favorable reaction to drive and unfavorable one....
Micr 3033 Ch. 3 and 13 Tested Questions
with Revised Answers | UPDATED!!!!
Describe briefly the three stages of cellular metabolism that lead from food to waste
products in animals cells. - Answer-
The figure above illustrates the coupling of a favorable reaction to drive and unfavorable
one. Describe how this concept works in cells using as an example one of the common
activated carrier molecules. - Answer-The anabolic process of building polysaccharides
is unfavorable, but coupled with the hydrolysis of activated carrier molecule, like ATP,
gives an overall negative free energy and allows the reaction to occur.
In the absence of oxygen, cells consume glucose at high steady rate. When oxygen is
added glucose consumption decreases precipitously and is then maintained at the lower
rate. Why is glucose consumed at high rate in the absence of oxygen and at low rate in
its presence? - Answer-With out oxygen, animal cells can only produce ATP (main
source of energy) through glycolysis, which only makes 2 net ATP from energy glucose
molecule and cells must use a lot of glucose to make enough ATP.
In glycolysis, why do you think is it that the glucose molecule is activated by two
phosphates - at the expense of 2 ATP molecules per mole, in a process designed to
extract energy (catabolism)? - Answer-In order to over come the energy activation that
is needed for glycolysis to happen the cell must use some energy in order to start the
reaction. The cell is able to use 2 ATP molecules/mole to jump start the reaction and is
still able to create a net gain of 2 atp. 16C--> 23C "unfavorable"
How many ATP molecules are produced by the complete oxidation of one molecule of
glucose? Take into account ATP molecules that have been invested early in the
process and the ATP molecules produced during glycolysis, the TCA cycle and
oxidative phosphorylation. - Answer-Glycolysis: 2 ATP ETC: 28 ATP All: 30 ATP
In the stepwise conversion of methane to carbon dioxide via the formation of methanol,
formaldehyde and formic acid as intermediates, describe how oxidation and reduction
involves a shift in the balance of electrons? - Answer-Additions of hydrolysis rearrange
the electron. oxidation: loses an electron. Reduction: gains an electron.
How does ATP couple reactions? What are the essential underlining chemical and
physical principles that make coupled reactions work (favorable)? - Answer-The energy
given off by ATP breaking down into ADP and it provides enough energy to be the
activation energy for reactionthat doesnt have sufficient NRG to do it by itself. Such
hydrolysis reactons often involve the transfer at terminal P in ATP to another molecule.
This phosphorylation reaction then powers the molecular motors.
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