Hedgehog (Hh) presence causes__ 

a) binds to Smo, causing Smo to be endocytosed from the cell surface and degraded

b) binds to Ptc, causing Ptc to be endocytosed from the cell surface and degraded

c) degraded Ptc and relieving the inhibition of Smo

d) degraded Smo and relieving the inhibition of Ptc

TLS Online TPP Program

#Question id: 981

#Unit 1. Molecules and their Interaction Relevant to Biology

Which is a method by which the synthesis of AMP or GMP is regulated?

TLS Online TPP Program

#Question id: 982

#Unit 1. Molecules and their Interaction Relevant to Biology

What is the source of the N-3 during the de novo biosynthesis of pyrimidines?

TLS Online TPP Program

#Question id: 983

#Unit 1. Molecules and their Interaction Relevant to Biology

The pyrimidine ring system is shown below. What is the source of the C-2 during the de novo biosynthesis of pyrimidines?

TLS Online TPP Program

#Question id: 984

#Unit 1. Molecules and their Interaction Relevant to Biology

What is the source of the N-1 during the de novo biosynthesis of pyrimidines?

TLS Online TPP Program

#Question id: 985

#Unit 1. Molecules and their Interaction Relevant to Biology

 In the pyrimidine ring system, what is the source of the carbons 4,5 and 6 during the de novo biosynthesis of pyrimidines?

TLS Online TPP Program

#Question id: 986

#Unit 1. Molecules and their Interaction Relevant to Biology

Inhibition of ATCase by a ________ nucleotide and activation of ATCase by a ________ nucleotide keep the balance of purine and pyrimidine pools in E. coli.