The Biology Project
Cell Signaling > Problem
8: Protein Kinase Cascades
Some receptors for growth factors activate a protein kinase cascade,
with the participation of multiple enzymes to effect a change in gene
expression. Which of the following statements about a protein kinase cascade
Problem 8 |
Tutorial | Problem 9
||Multiple steps allow the amplification of the signal.
||External signals can lead to changes in gene expression.
||Multiple steps leading to kinase activations can result
in cells having different responses, depending on the presence or
absence of target proteins.
||Multiple steps in an activation mean that abnormal
stimulation of a cell response such as growth can occur with mutations
in more than one gene.
All of the above are true.
Yes, protein kinase cascades are important
components of membrane signaling. The signal is amplified, target
proteins for kinases determine responses, and mutations in signaling
pathways are a significant part of cancer cell growth.
Project > Cell
Biology > Cell
Signaling > Problem
All contents copyright © 2002-04. All rights reserved.