Dimitri signalling pathway quiz

Which of the followin is wrong?

• A hormone molecule would bind a receptor on the membrane and trigger response pathways.

• Endocrine signals involve hormones.

• Paracrine is a cell secret signaling molecules that bind next to its neighbors.

• Autocrine is a cell secret signalling molecules that target tissues or organs that is far away.

Signal transduction pathway is a pathway that relays a signal from outside of the cell to inside where a responses is triggered, like specific gene transcription.

• True

• False

What does a protein kinase do?

• Add a methyl group to histone

• Add a phosphate group to other proteins (phosphorylation)

• Destroy and recycle an enzyme.

• Adjust a pH of the environment of an enzyme.

Which enzyme does the opposite function to protein kinase?

• Phosphatase

• Trypsin

• Insulin

• lysozyme

Which of the following is not a major component of signal transduction pathway?

• Receptors

• second messenger

• phosphorylation cascade

• nuclear response

• the destroy of the signaling molecule

Which of the following is the a TYPICAL response to signal transduction that happens all the time?

• Nuclear response

• Enzyme response

• Endocytosis

• Exocytosis

• breakdown of cell membrane

Which of the following is not a reason that signal transduction is important?

• The cells need to survive in the fast changing environment..

• The cells need to know when to grow and hibernate.

• The cells need to know when to destroy itself.

• The cells need to know when to differentiate into different tissues.

• All these choices are correct.

What if the signal transduction pathway goes wrong?

• A cell might develop into cancer cell.

• Embryonic stem cell won't develop into right tissue.

• Cell is not optimized in the challenging environment

• Cell may go forward to necrosis.

• All these choices are correct

The molecules bind to the receptors and start the signalling transduction pathway is called

• Starton

• Makon

• Binder

• Ligand

• Positron

Which of the following is not a receptor involve in the signal transduction pathway?

• ligand gated ion receptor

• GPCRs

• G-protein receptor

• RTKs--Receptor tyrosine kinase.

• clathrin receptor