Quiz 16

The first step in a signaling pathway that responds to a molecule that stays in the extracellular space is

What type of cell response would take the longest amount of time (on the scale of minutes to hours) to execute?

Which of the following is NOT an intracellular signaling protein activated by an RTK?

Steroid hormones trigger transcription of target genes by

Which of the following types of cell signaling is long range and uses hormones as signals?

The active form of a monomeric GTP-binding protein is the

Which of the following describes negative feedback regulation?

Enzymes that add a phosphate group to a switch protein are called

How does the binding of a signal molecule activate an RTK for downstream signaling?

Shown below is a diagram of how theoretical intracellular signaling pathways could integrate incoming signals to produce a coordinated cell response.

Signaling pathways that respond to molecules in the extracellular space start with the binding of the molecule to a receptor on the cell surface.

Cell responses that take the longest amount of time (on the scale of minutes to hours) to execute are typically transcriptional responses.

One protein that is NOT activated by an RTK (Receptor Tyrosine Kinase) is G protein.

Steroid hormones trigger transcription of target genes by binding to intracellular receptors.

Negative feedback regulation occurs when the product of a pathway inhibits an earlier step in the same pathway.

Enzymes that add a phosphate group to a switch protein are called protein kinases.

The binding of a signal molecule to an RTK (Receptor Tyrosine Kinase) activates it for downstream signaling by causing the receptor to dimerize and autophosphorylate.

Intracellular signaling pathways can integrate incoming signals to produce a coordinated cell response by converging on common signaling components or by having opposing effects on a shared target.