Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 55341
TLS Online TPP Program

#Question id: 13163

Following statements are regarding to the interaction between β2-adrenergic receptor and G- protein.

#Unit 4. Cell Communication and Cell Signaling
  1. Binding of ligand to the receptor induces major conformational changes in which there are substantial movements of transmembrane helices 5 and 6 and changes in the structure of the C3 loop; together, these changes create a surface that can bind to a segment of the Gα subunit and when unbound by ligand, the receptor has no surface that is complementary to the G protein and thus cannot bind to it.
  2. Binding of ligand to the receptor induces major conformational changes in which there are substantial movements of transmembrane helices 1 and 4 and changes in the structure of the C3 loop; together, these changes create a surface that can bind to a segment of the Gα subunit and when unbound by ligand, the receptor has no surface that is complementary to the G protein and thus cannot bind to it.
  3. Binding of ligand to the receptor induces major conformational changes in which there are substantial movements of transmembrane helices 5 and 6 and changes in the structure of the C3 loop; together, these changes have no surface that can’t bind to a segment of the Gα subunit and when unbound by ligand, the receptor creates a surface that is complementary to the G protein and thus can bind to it.
  4. Binding of ligand to the receptor induces major conformational changes in which there are substantial movements of transmembrane helices 3, 5, 6 and 7 and changes in the structure of the E2 loop; together, these changes create a surface that can bind to a segment of the Gα subunit and when unbound by ligand, the receptor has no surface that is complementary to the G protein and thus cannot bind to it.
More Questions
TLS Online TPP Program

#Question id: 19829

#Unit 12. Applied Biology

At the site of infection in plants accumulation of which compounds leads to host cell death
TLS Online TPP Program

#Question id: 19827

#Unit 12. Applied Biology

What kind of molecules is Phytoalexins

1. Low molecular weight antibiotic

2. High molecular weight antibiotic

3. Polyphenolic

4. Terpenoid compounds

Which of the following is a correct option?
TLS Online TPP Program

#Question id: 19826

#Unit 12. Applied Biology

 _________are low molecular weight antibiotic polyphenolic or terpenoid compounds produced by plant cells
TLS Online TPP Program

#Question id: 19825

#Unit 12. Applied Biology

The elicitor produced by a pathogen is which type of molecule 1. Protein encoded by an avirulence gene 2. Products of metabolic activity of this protein Which of them are correct?

1. Protein encoded by an avirulence gene

 2. Products of metabolic activity of this protein

Which of them are correct? 

Which of them are correct?ch of them are correct? 
TLS Online TPP Program

#Question id: 19824

#Unit 12. Applied Biology

Several biochemical reactions heading to the production of active oxygen species, phytoalexin biosynthesis occurs due to
TLS Online TPP Program

#Question id: 19823

#Unit 12. Applied Biology

The elicitors are recognized by receptor-like molecules present in resistant plants. This recognition initiates several biochemical reactions such as

1. Phytoalexin biosynthesis

2. Cell wall reinforcement

3. Release of hydrolytic enzymes

4. Rapid cell death

Which of the following is/are correct?