Are most chemical reactions in living cells at equilibrium?
Enzyme

Quiz
•
Biology
•
University
•
Hard

Anh Nguyen Le My
Used 36+ times
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12 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Yes
No
only the exergonic reactions
all reactions except those powered by ATP hydrolysis
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Choose the pair of terms that correctly completes this sentence: Catabolism is to anabolism as is to .
exergonic; spontaneous
exergonic; endergonic
free energy; entropy
work; energy
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A reaction has a ∆G of –5.6 kcal/mol. Which of the following would most likely be true?
The reaction could be coupled to power an endergonic reaction with a ∆G of +8.8 kcal/mol
The reaction is nonspontaneous.
To take place, the reaction would need to couple to ATP hydrolysis.
The reaction would result in products with a greater free-energy content than in the initial reactants
The reaction would proceed by itself but might be very slow
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The oxidation of glucose to CO2 and H2O is highly exergonic: ∆G = –636 kcal/mole. This is spontaneous, but why is it very slow?
Few glucose and oxygen molecules have the activation energy at room temperature.
There is too much CO2 in the air.
CO2 has higher energy than glucose.
The formation of six CO2 molecules from one glucose molecule decreases entropy.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A friend is designing an industrial process around an endergonic biological reaction. You recommend finding a way to provide
ATP
minerals
a lower pH
a plasma membrane
mitochondria
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following statements about enzymes is incorrect?
Enzymes can be used to accelerate both anabolic and catabolic reactions
An enzyme lowers the activation energy of a chemical reaction
An enzyme is very specific in terms of the substrate to which it binds
An enzyme is consumed during the reaction it catalyzes
Most enzymes are proteins
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When a substrate molecule binds to an enzyme, it binds to a particular location known as the …………
active site
regulatory site
allosteric site
binding site
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