Unit 4 AP Biology Review

What is the process by which cells communicate with each other?

• Cell transportation

• Cell division

• Cell reception

• Cell signaling

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What is the role of receptors in cell communication?

• Receptors in cell communication have no role in triggering cellular responses

• Receptors in cell communication are only found in plant cells

• Receptors in cell communication produce signaling molecules

• Receptors in cell communication recognize and bind specific signaling molecules to trigger a cellular response.

How do cells regulate their progression through the cell cycle?

• Checkpoints controlled by cyclin-dependent kinases (CDKs) and cyclins

• Cells regulate their progression through the cell cycle by external factors only

• Cells regulate their progression through the cell cycle by random chance

• Cells regulate their progression through the cell cycle by following a predetermined schedule

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What is the significance of mitosis in the cell cycle?

• Mitosis leads to cell death

• Mitosis ensures genetic stability and growth by producing two identical daughter cells.

• Mitosis causes genetic mutations

• Mitosis is only relevant in plant cells

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Which of the following best describes the function of the nucleolus within the nucleus?

• It stores DNA.

• It synthesizes ribosomal RNA.

• It regulates cell division.

• It modifies proteins.

What is the primary function of the mitochondria in eukaryotic cells?

• Photosynthesis

• Protein synthesis

• Energy production

• Lipid storage

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Compare and contrast the functions of the smooth and rough endoplasmic reticulum.

• Both synthesize proteins; the rough ER also detoxifies chemicals.

• The smooth ER synthesizes lipids; the rough ER synthesizes proteins.

• Both store calcium ions; the smooth ER also synthesizes proteins.

• The rough ER detoxifies chemicals; the smooth ER stores genetic material.

Explain how the structure of the cell membrane contributes to its function.

• The rigid structure provides support and protection.

• The fluid mosaic model allows selective permeability.

• The thick layer prevents all substances from entering.

• The solid structure allows for easy transport of materials.

A cell is observed to have a large number of lysosomes. What might this indicate about the cell's function?

• It is involved in energy production.

• It is involved in protein synthesis.

• It is involved in waste processing and recycling.

• It is involved in lipid storage.

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Which organelle is responsible for modifying, sorting, and packaging proteins for secretion?

• Ribosome

• Golgi apparatus

• Endoplasmic reticulum

• Lysosome