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TLS Online TPP Program

#Question id: 1303

What is a primary function of integrins?

#Unit 4. Cell Communication and Cell Signaling

  1. connecting intermediate filaments to microtubules involved in vesicular transport

  2. linking the primary and secondary cell walls in plants

  3. transmitting signals from the extracellular matrix to the cytoskeleton

  4. transmitting chemical signals from the Golgi apparatus to the plasma membrane

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TLS Online TPP Program

#Question id: 30107

#Unit 1. Molecules and their Interaction Relevant to Biology

Major controls of de novo AMP synthesis include:

1. allosteric inhibition by GMP.
2. allosteric inhibition by AMP.
3. availability of PRPP.
4. stimulation by GTP.
TLS Online TPP Program

#Question id: 30108

#Unit 1. Molecules and their Interaction Relevant to Biology

Aspartate plays a role in all of the following EXCEPT:
TLS Online TPP Program

#Question id: 30109

#Unit 1. Molecules and their Interaction Relevant to Biology

Allopurinol is an inhibitor of xanthine oxidase. Administration of allopurinol to a patient with gout and normal HG-PRT levels would be expected to lead to all of the following EXCEPT:
TLS Online TPP Program

#Question id: 30110

#Unit 1. Molecules and their Interaction Relevant to Biology

The ribose phosphate group of purine nucleotide is taken from which compound?
TLS Online TPP Program

#Question id: 30111

#Unit 1. Molecules and their Interaction Relevant to Biology

What is the source of the C-2 during the de novo biosynthesis of pyrimidines?
TLS Online TPP Program

#Question id: 30112

#Unit 1. Molecules and their Interaction Relevant to Biology

With respect to the de novo synthesis of nucleotides, which one of the following statements is INCORRECT?