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29 Nov 2019

Hydrophobic extracellular signaling molecules would most likelyinteract with ____________ in/on target cells.

A.

receptor tyrosine kinases

B.

intracellular receptors

C.

G protein-coupled receptors

D.

ligand-gated ion channels

E.

membrane transport proteins

0.5 points

Question 2

__________ signal(s) through enzyme-linked receptors where thereceptor is not itself a kinase but instead recruits cytosolickinases.

A.

Cytokines

B.

Insulin

C.

Adrenaline

D.

Neurotransmitters

E.

Thyroid hormones

0.5 points

Question 3

Which of the following is a post-translationalmodification that's oftentimes used to regulate proteinfunction within intracellular signaling cascades?

A.

Allosteric interaction

B.

Compartmentalization

C.

Second messenger system

D.

Assembly of protein complexes

E.

Ubiquitination

0.5 points

Question 4

___________ is a common type of "allosteric switch" proteinwhich gets directly activated by intracellular calcium.

A.

GTP-binding protein

B.

Kinase

C.

Calmodulin

D.

Phosphatase

E.

Heterotrimeric G protein

0.5 points

Question 5

When a small GTP-binding protein (GBP) is in the "on" (active)state (select any/all answers that apply):

A.

its Switch I and Switch II domains tilt toward one another.

B.

the GBP can physically interact with downstream effectormolecules.

C.

GDP is bound within the nucleotide-binding pocket of theGBP.

D.

the GBP is incapable of hydrolyzing its bound GTP.

E.

the Switch II domain is phosphorylated on multiple tyrosineresidues.

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Collen Von
Collen VonLv2
17 Dec 2019
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