RAHS AP Biology Signal Transduction Pathway

What are the three parts of signal transduction pathway?

• reception, transduction, response

• confirmation, transduction, transcription

• reception, amplification, transcription

• confirmation, amplification, response

Transduction step traditionally amplifies the signal, which of the following are NOT involved with transduction?

• secondary messengers

• protein modification

• phosphorylation cascade

• ligands

Which of the following is NOT a response by the cell from a signal transduction pathway?

• cell growth

• gene expression

• secretion of molecules

• all of the above are responses

Describe what occurs when the ligand binds to the receptor.

• confirmation change in shape of receptor

• phosphorylation of ligand

• ligand passes through the membrane

• receptor binds additional ligands

Describe the impact of a mutation in any domain of the protein components of the transduction signaling pathway.

• receptor unable to bind to ligand

• no changes in transduction due to initial signal transduction from ligand

• alters response of the cell

• amplification of signaling pathway to bind more ligands

Tags

NGSS.HS-LS3-2

To respond to a signal, a cell must have a(n) molecule that can detect the signal.

• receptor

• ligand

• responder

Signals that travel to distant cells through the circulatory system use what type of communication?

• Autocrine

• Paracrine

• Endocrine

• Juxtacrine

What is the role of protein kinase in a signal transduction pathway?

• activates a molecule by adding a phosphate to the target molecule

• deactivate a molecule by removing a phosphate from the target molecule

• activates a molecule by removing a phosphate from the target molecule

• deactivate a molecule by adding a phosphate to the target molecule

What is the purpose of transduction?

• send a signal to a target cell

• receive a signal from another cell

• respond to a signal pass along internally

• pass along a signal through the cell to the location where the cell response will occur.

Once a cell responds to a signal, what would need to occur to stop the response?

• activate the relay proteins

• deactivate the relay proteins

• destroy the cell

• genetically modify the DNA of the cell