Cell Communication, Signal Transduction, Feedback Mechanisms, and Cell Cycle Quiz

What structures do plant cells use to communicate?

• Desmosomes and plasmodesmata

• Gap junctions and tight junctions

• Plasmodesmata and gap junctions

• Tight junctions and plasmodesmata

Identify two reasons for why cell-to-cell communication is critical?

• To facilitate cell division and promote cell differentiation

• To enhance cellular respiration and increase ATP production

• To regulate gene expression and control cell growth

• To coordinate cellular activities and maintain homeostasis

Where would the estrogen receptors be in the target cell?

• Nucleus

• Cytoplasm

• Cell membrane

• Mitochondria

Name the 3 stages of cell signaling.

• Reception, transduction, response

• Transduction, amplification, response

• Reception, transduction, amplification

• Reception, amplification, response

In which stage of cell signaling would you find cAMP?

• Amplification

• Response

• Transduction

• Reception

What molecules help to relay and amplify messages during the signal transduction pathway?

• Proteins

• Nucleic acids

• Lipids

• Carbohydrates

What enzyme is responsible for shutting off pathways?

• Protein kinase

• Protein phosphatase

• Adenylyl cyclase

• G protein

In the last stage of the signal transduction pathway, the response, identify 3 different responses that can be seen in cells.

• Cell growth, metabolism, ion transport

• Cellular respiration, DNA replication, cell signaling

• Cell differentiation, protein synthesis, ATP production

• Cell division, apoptosis, gene expression

What is quorum sensing?

• The ability of cells to respond to external stimuli

• The ability of cells to sense their own density

• The ability of cells to communicate through electrical signals

• The ability of cells to regulate gene expression

How could cancer cells take advantage of mutated protein phosphatase?

• They can inhibit cell division

• They can bypass cell cycle checkpoints

• They can repair DNA damage

• They can activate tumor suppressor genes