Biology Final Chapter 6
In the example above, how does the final product of the pathway inhibit the pathway?
By binding to an allosteric site of the first enzyme in the pathway.
If product D is abundant, why is it preferable to inhibit E2 rather than E1?
E1 can only be regulate by B or E
Release of the last phosphate from ATP is endergonic.
False
When ATP is hydrolyzed to form ADP, the energy is released into the cytoplasm where enzymes use it to run endergonic reactions.
False
What happens when the coenzyme NAD+ gains an H atom?
It also gains an electron causing it to be reduced.
Based on the reaction in the animation, what can you say about the change in free energy of the cleavage of sucrose into glucose and fructose?
It is negative and the reaction is exergonic.
Based on the animation, which of the following observations is true?
The product from one reaction served as the substrate for the next reaction.
Once phosphates are released from ATP they can be added back in an endergonic reaction.
True
The creatine-Phosphate to creatine reaction has a ΔG of -11kcal/mole and thus can be used to generate ATP from ADP.
True
When ATP is used in a reaction, the last phosphate is transferred to the substrate.
True
Sucrase uses ____ to cleave sucrose into two monosaccharides.
Water
A hydrogen atom consists of
a proton and an electron.
The enzyme in the animation is most likely catalyzing _____.
an anabolic reaction.
Molecules are synthesized in _____ reactions.
anabolic
Molecules are broken down in _____ reactions.
catabolic
Anabolic reactions _____ NADH and ATP.
consume
How often can a sucrase molecule be used to hydrolyze sucrose?
many times
A E1 B E2 C ---> --->
only A as substrate
Cells obtain energy by ________ food molecules such as glucose.
oxidizing
Catabolic reactions ______ NADH and ATP.
produce
What is the ultimate source of most energy in the biosphere?
solar energy from the sun
Which of the following binds most tightly to the active site of an enzyme?
substrate
In feedback inhibition, the inhibitor of the biochemical pathway is often
the final product of the biochemical pathway.