AP Biology - Unit 4 Review

Front

What is the role of secondary messengers in cell signaling?

Back

Secondary messengers amplify the signal received by a receptor, leading to a cellular response.

Front

Define apoptosis.

Back

Apoptosis is the process of programmed cell death that occurs in multicellular organisms.

Front

What occurs during the transduction phase of cell signaling?

Back

Transduction involves the conversion of the signal into a form that can bring about a cellular response, often through protein modification and phosphorylation cascades.

Front

What are plasmodesmata?

Back

Plasmodesmata are channels between plant cells that allow for the exchange of small soluble compounds.

Front

What is the end result of mitosis?

Back

The end result of mitosis is two genetically identical diploid daughter cells.

Front

Explain the significance of ligand-receptor interactions in cell signaling.

Back

Ligand-receptor interactions initiate the signaling cascade that leads to a cellular response.

Front

What is the difference between mitosis and meiosis?

Back

Mitosis results in two identical diploid cells, while meiosis results in four genetically unique haploid cells.

Front

Define signal transduction pathway.

Back

A signal transduction pathway is a series of molecular events and chemical reactions that lead to a cellular response following the binding of a ligand to a receptor.

Front

What is the function of gap junctions in animal cells?

Back

Gap junctions allow for direct communication and transfer of ions and small molecules between adjacent animal cells.

Front

Describe the role of phosphorylation in cell signaling.

Back

Phosphorylation is the addition of a phosphate group to a protein, which can activate or deactivate the protein, thus regulating the signaling pathway.