HELP PLEASE! (AP BIOLOGY)

Dark Ness

wrote...

13 years ago

1.Are chemical reactions at equilibrium in living cells?
a) yes

b) no

c) only the exergonic reactions

d) all reactions except those powered by ATP hydrolysis

2.Adenosine monophosphate activates the enyzme phosphofructokinase by binding at a site distinct from the substrate binding site. This is an example of?

a) cooperative activation

b) allosteric activation

c)activation by an enzyme cofactor

d) coupling exergonic and endergonic reactions.

THANKS

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duddy

wrote...

Staff Member

13 years ago

1.Are chemical reactions at equilibrium in living cells?

a) yes

b) no

c) only the exergonic reactions

d) all reactions except those powered by ATP hydrolysis There are other types of EXERGONIC REACTIONS in the cell...

2.Adenosine monophosphate activates the enyzme phosphofructokinase by binding at a site distinct from the substrate binding site. This is an example of?

a) cooperative activation

b) allosteric activation

c)activation by an enzyme cofactor

d) coupling exergonic and endergonic reactions.

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- Master of Science in Biology
- Bachelor of Science

Dark N. Author

wrote...

13 years ago

ty sir!

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bio_man

wrote...

Educator

13 years ago

I agree with Duddy.

Reactions in a closed system eventually reach equilibrium and then do no work. Therefore, cells are not in equilibrium; they are open systems experiencing a constant flow of materials. A defining feature of life is that metabolism is never at equilibrium.

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Dark N. Author

wrote...

13 years ago

thanks a bunch. i also have more questions to ask but is theres a limit a day to ask

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bio_man

wrote...

Educator

13 years ago

Quote from: Dark Ness (13 years ago)

thanks a bunch. i also have more questions to ask but is theres a limit a day to ask

Just ask it Wink Face

But start a new topic!

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