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BIO 201 ENERGY AND CELLULAR RESPIRATION
Terms in this set (32)
Which of the following statements about the laws of thermodynamics is INCORRECT?
the entropy of our universe does not change.
Which of the following does NOT describe an example of kinetic energy?
a can of baked beans
Which of the following chemical reactions is MOST energetically favorable.
PEP to pyruvate, -14.8 kcal/mol
CO2 and H2O will not spontaneously combine to form glucose on their own because
this reaction is endergonic.
create ordered products.
The activation energy of a reaction refers to the minimum amount of energy
necessary to cause a reaction to proceed on its own.
The amount of available energy that can be used to do work is known as (I) and - at a constant temperature - is defined as the (II) from which the (III) is subtracted.
(I) free energy, (II) enthalpy, (III) entropy
Each enzyme can speed up only one particular reaction. This specificity is due to the ______.
shape of both the enzyme and the substrate
Which of the following statements is NOT correct about enzymes?
Enzymes raise the activation energy for a reaction.
What happens to sucrase when it binds to sucrose?
Sucrase goes through a conformational change.
Still referring to the sucrase video from the previous questions, what can you say about the change in free energy during the cleavage of sucrose into glucose and fructose?
It is negative and the reaction is exergonic.
L-Arabinose is a naturally occurring, non-caloric sweetener that is a noncompetitive inhibitor of sucrase. If L-Arabinose is consumed, what will happen to the Vmax of the reaction and Km of the substrate?
Vmax will decrease, but Km will not change
have regions that bind with inhibitor or activator molecules.
An enzyme may catalyze a reaction by stressing or destabilizing the bonds of the substrates to bring the reaction to a point from which it proceeds spontaneously. This critical point in the enzymatic reaction is known as the
Mountaineerase, converts dimmerol into brainiac. Noitol looks like dimmerol, but is NOT modified by mountaineerase. Noitol inhibits the conversion of dimmerol to braniac. If the ratio of dimmerol to noitol increases dramatically, the inhibitory effect of noitol on mountaineerase are no longer apparent. Which of the following is true?
Dimmerol is the substrate & noitol is a competitive inhibitor
Patients with McArdle's Disease lack an enzyme in their livers that catalyzes the hydrolysis of glycogen. These individuals tire easily during exercise because of low blood sugar. Which of the following would best explain this symptom?
Glycogen isn't be broken down to glucose to serve as fuel during exercise.
Which best describes the role of thiamine pyrophosphate in the reaction to cleave pyruvate?
It behaves like a catalyst and is not consumed during the reaction.
Which statement is NOT correct in the cycling of ATP?
Because we need ATP for all cell energy needs, huge amounts of ATP are stored in cells.
Your body needs amino acids to build new proteins encoded by your genes. Many of these amino acids come from your diet through the ____ of proteins you eat.
An apple tree grows fruit through photosynthesis, in which carbon dioxide gas combines with water to form glucose. This is an example of
After ATP donates a phosphate group in a coupled reaction, it becomes ADP. The ADP can be converted back to ATP in a(an) ____ reaction.
Which of the following reactions is the MOST endergonic one that could be driven by coupling it with the hydrolysis of ATP?
glucose to glucose-6-P (+4 kcal/mol)
During normal metabolism in a cell, the ______ release of energy from catabolic reactions must be greater than the energy requirement for maintaining an organized cell structure and function.
During feedback inhibition, the last product of the pathway acts as ________ inhibitor of the first enzyme in the pathway.
allosteric or competitive
In the reaction A- + B => A + B-,
molecule A is oxidized and B is reduced.
The synthesis of ATP using energy provided by an electrochemical gradient is most accurately referred to as
Which of the following is the correct equation for cellular respiration?
C6H12O6 + 6 O2 → 6 CO2 + 6 H2O
Which of the following statements is FALSE about the coenzyme FAD+ as it is converted to FADH.
FADH shuttles one electron and two protons to the electron transport chain.
Once ATP donates its phosphate to a coupled reaction it becomes ADP. The ADP
can be recharged in an endergonic reaction to form ATP.
In the equation for cellular respiration, ATP and heat would be on which side of the reaction?
The products because this is an exergonic reaction.
Below is the summary formula of photosynthesis, another biologically important metabolic process: 6CO2 + 6H2O → C6H12O6 + 6O2 Which atoms are being reduced and oxidized in this process?
carbon is being reduced and oxygen is oxidized
Which of the following processes release carbon dioxide gas?
pyruvate breakdown and the citric acid cycle
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