Which of the following is a mechanism for down regulation of signaling from G protein-coupled receptors?

a. a change in the Kd of the receptor-hormone complex

b. proteolysis of the Gα subunit                     

c. hydrolysis of cAMP to 5´-AMP

d. dephosphorylation of adenylyl cyclase

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#Question id: 13234

#Unit 6. System Physiology – Plant

Some roots can develop positive hydrostatic pressure in their xylem is called

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#Question id: 1965

#Unit 4. Cell Communication and Cell Signaling

In some insects, such as Drosophila, fungal cell wall elements can activate the protein Toll. What is Tollʹs function?

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#Question id: 10650

#Unit 10. Ecological Principles

Following some characteristic feature of K selected species

A. semelparity 

B. Mate choice

C. Density independent mortality

D. large size of offspring

What is the above combination is correct?

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#Question id: 19277

#Unit 9. Diversity of Life Forms

which of these statements correctly describes a portion of the pine life cycle? 

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#Question id: 12297

#Unit 10. Ecological Principles

___________ is the pattern of individuals of a population scattered throughout habitat space.