Practice Final Ans

5 in the presence of ctp c ctp is the eventual

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: is sufficient for the needs of the cell, CTP inhibits an enzyme that catalyzes an early step in the synthetic pathway, ATCase, by feedback inhibition. (d) ATP is a positive effector because when ATP is added the affinity of the E for the S increases. This is indicated by the decrease in K0.5 in the presence of ATP. (e) One reason, there may be other reasonable ideas: ATP is a purine nucleotide whereas CTP is a pyrimidine nucleotide. Activation of ATCase by ATP promotes CTP synthesis when [ATP] is high thus balancing the cellular pool of purine and pyrmidine nucleotides....
View Full Document

Ask a homework question - tutors are online