Cells and Homeostasis Unit Review

What is the primary function of the cell membrane in both prokaryotic and eukaryotic cells?

• Energy production

• Protein synthesis

• Regulation of substances entering and leaving the cell

• DNA replication

Which of the following structures is found in eukaryotic cells but not in prokaryotic cells?

• Ribosome

• Nucleus

• Cell wall

• Plasma membrane

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

• The rigid structure prevents any movement of molecules.

• The semi-permeable nature allows selective transport of molecules.

• The cell membrane is impermeable to all substances.

• The cell membrane actively transports all molecules without selection.

Compare the complexity of prokaryotic and eukaryotic cells in terms of their organelles.

• Both have the same number of organelles.

• Prokaryotic cells have more complex organelles.

• Eukaryotic cells have more complex and numerous organelles.

• Neither type of cell has organelles.

Which process is primarily responsible for the movement of water across the cell membrane?

• Active transport

• Osmosis

• Endocytosis

• Exocytosis

Describe how prokaryotic cells differ from eukaryotic cells in terms of genetic material organization.

• Prokaryotic cells have a nucleus, while eukaryotic cells do not.

• Eukaryotic cells have circular DNA, while prokaryotic cells have linear DNA.

• Prokaryotic cells have circular DNA in the cytoplasm, while eukaryotic cells have linear DNA within a nucleus.

• Both have their DNA organized in the same way.

What role does the cell membrane play in the process of homeostasis?

• It generates energy for the cell.

• It synthesizes proteins.

• It regulates the internal environment by controlling the entry and exit of substances.

• It stores genetic information.

Evaluate the impact of a malfunctioning cell membrane on cellular homeostasis.

• The cell would continue to function normally.

• The cell would be unable to maintain a stable internal environment.

• The cell would produce more energy.

• The cell would replicate its DNA more efficiently.

Which of the following is a characteristic of eukaryotic cells but not prokaryotic cells?

• Presence of ribosomes

• Presence of a plasma membrane

• Presence of membrane-bound organelles

• Presence of a cell wall

How does the process of diffusion contribute to cellular homeostasis?

• It allows for the active transport of molecules against a concentration gradient.

• It enables the passive movement of molecules along a concentration gradient, helping balance concentrations.

• It prevents any movement of molecules across the cell membrane.

• It requires energy to move molecules across the cell membrane.