Cell Signaling and Ligands Quiz

What is the role of a ligand in cell signaling?

• To bind to receptors and initiate a cellular response

• To transport nutrients across the cell membrane

• To provide energy for cellular processes

• To replicate DNA within the cell

Where are hydrophilic ligands most likely to bind?

• Membrane receptor

• Intracellular receptor

• Cytoplasm

• Nucleus

What is the final outcome of a signal transduction pathway?

• Cellular response

• DNA replication

• Protein synthesis

• Energy production

What is the primary function of receptors in cells?

• To produce energy

• To recognize signals called ligands

• To store genetic information

• To transport nutrients

What are most receptors made of?

• Lipids

• Carbohydrates

• Proteins

• Nucleic acids

What is the role of a signal transduction pathway in cells?

• To store energy

• To enable the cell to respond to signals

• To replicate DNA

• To transport oxygen

What type of molecules do cells use to recognize hydrophilic signals?

• Lipids

• Proteins

• Carbohydrates

• Nucleic acids

What is the function of scaffolding proteins in cells?

• To store energy

• To organize molecules for signal recognition and transduction

• To replicate DNA

• To transport nutrients

What is the role of the protein kinase cascade in cellular signaling?

• It inhibits a recognized signal.

• It amplifies a recognized signal.

• It degrades a recognized signal.

• It ignores a recognized signal.

What must each of your cells recognize to perform its function in your body?

• Only external signals.

• Only intracellular signals.

• Both external and intracellular signals.

• Neither external nor intracellular signals.