if ATP is not present in an ATP requiring rxn, Does it occur slowly?

[TalinAagam]

so if a reaction requires ATP, (ie. a lysis), and ATP is not present, does this reaction occur more slowly in the absense of ATP?
Here is the exact question from Page 296 in the TPR book

In the absense of ATP, the Ubiqutination reaction would:

A. occur more slowly than in the presense of ATP
b. occur more quickly than in the presense of ATP
c. not be affecteed
D. not occur.

answer according to TPR is D...

but I think A is the correct ans, because ATP hydrolysis provides energy to reach the activation energy so that is in effect helping the reaction occur faster, correcT?

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[Sterling Archer]

No, if a reaction REQUIRES ATP then the reaction will not occur at all without ATP. In the question posted, the reaction is not spontaneous unless coupled with the hydrolysis of ATP, making the net reaction spontaneous.

 

[487806]

so if a reaction requires ATP, (ie. a lysis), and ATP is not present, does this reaction occur more slowly in the absense of ATP?
Here is the exact question from Page 296 in the TPR book

In the absense of ATP, the Ubiqutination reaction would:

A. occur more slowly than in the presense of ATP
b. occur more quickly than in the presense of ATP
c. not be affecteed
D. not occur.

answer according to TPR is D...

but I think A is the correct ans, because ATP hydrolysis provides energy to reach the activation energy so that is in effect helping the reaction occur faster, correcT?

ATP hydrolysis drives the endergonic reaction, making the overall reaction spontaneous. Without ATP, the reaction is nonspontaneous and won't occur. You're getting confused between activation energy and spontaneity.