Cell Communication Review 4.1-4.5

What is the first step of signal transduction?

• response

• reception

• transduction

• transcription

What is the signaling molecule called?

• Repressor

• Activator

• ligand

• enhancer

All cells respond to the same ligand with the same response

• True

• False

What is an example of a cellular response?

• turn on a gene

• activate an enzyme

• change in metabolism of the cell

• All of the answer are correct

During transduction a protein kinase changes confirmation (shape) when

• It is phosporylated

• before the ligand binds

• phosphorylase enzyme activates it

• during reception

Which is a secondary messenger?

• Ligand

• Hormone

• ATP

• cAMP

Calcium (Ca+) is released from the ER which allows for muscular contractions. What receptor mechanism is used to release the Ca+?

• Simple diffusion

• active transport

• gated ion channel

• ion channel

Signal transductions pathways have multiple step which allows for

• less ATP to be used

• amplification

• a longer response

• different responses at once

A mutation in the receptor protein will

• change the cells ability to respond to the signal

• allow for a different cellular response

• cause multiple cellular responses

• make no change for the cell

Tags

NGSS.HS-LS3-2

What is apoptosis?

• The relay of a signal through a gap junction

• Cells undergoing cell division after a wound

• programmed cell death

• endocrine cells secreting proteins