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Chapter 9: Q. 34 (page 252)

What characteristics make yeasts a good model for learning about signaling in humans?

Short Answer

Expert verified

Prokaryotes are yeasts. They have a brief life cycle, are easy to cultivate, and share certain regulatory systems with humans.

Step by step solution

01

Step. 1 Introduction

Yeasts are single celled creatures which emerged from multicellular progenitors, with certain types capable of developing multicellular traits through the formation of strands of interconnected budding cells called as pseudohyphae as well as false hyphae.

Cell signalling refers toward a cell's capacity to receive, analyse, and transfer information with it's own surroundings as well as with itself.

02

Step. 2 Explanation

Yeasts are eukaryotes, which indicates those who have many of the same systems as people because they are single-celled, they are easy to grow, develop quickly, have a short generation period, and are considerably simpler than humans.

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Most popular questions from this chapter

Histamine binds to the H1 G-protein-linked receptor to initiate the itchiness and airway constriction associated with an allergic response. If a mutation in the associated G-protein’s alpha subunit prevented the hydrolysis of GTP how would the allergic response change? a. More severe allergic response compared to normal G-protein signaling. b. Less severe allergic response compared to normal G-protein signaling. c. No allergic response. d. No change compared to normal G-protein signaling.

How does NF-κB induce gene expression?

a. A small, hydrophobic ligand binds to NF-κB, activating it.

b. Phosphorylation of the inhibitor Iκ-B dissociates the complex between it and NF-κB, and allows NF- κB to enter the nucleus and stimulate transcription.

c. NF-κB is phosphorylated and is then free to enter the nucleus and bind DNA.

d. NF-κB is a kinase that phosphorylates a transcription factor that binds DNA and promotes protein production.

What property enables the residues of the amino acids serine, threonine, and tyrosine to be phosphorylated?

a. They are polar.

b. They are non-polar.

c. They contain a hydroxyl group.

d. They occur more frequently in the amino acid sequence of signaling proteins.

The secretion of hormones by the pituitary gland is an example of _______________.

a. autocrine signaling

b. paracrine signaling

c. endocrine signaling

d. direct signaling across gap junctions

What would happen if the intracellular domain of a cellsurface receptor was switched with the domain from another receptor?
See all solutions

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