unit 4 questions

What does the cell theory state?

• All cells arise from inorganic matter

• All cells come from preexisting cells

• Cells are only found in multicellular organisms

• Cells do not contain genetic material

Who first observed cells using a primitive light microscope in 1665?

• Anton van Leeuwenhoek

• Robert Hooke

• Louis Pasteur

• Matthias Schleiden

What type of microscope allows scientists to view living cells?

• Electron microscope

• Light microscope

• Scanning electron microscope

• Transmission electron microscope

What is the main advantage of electron microscopes over light microscopes?

• Ability to view living cells

• Higher resolution

• Simpler design

• Lower cost

What is the primary function of the plasma membrane?

• Synthesizing proteins

• Enclosing the cell and regulating material movement

• Storing genetic material

• Producing energy

What is the fluid portion of the cytoplasm called?

• Cytoskeleton

• Cytosol

• Nucleoplasm

• Interstitial fluid

What is the role of the cytoskeleton in cells?

• A) Synthesizing DNA

• B) Providing support and enabling movement

• C) Storing nutrients

• D) Producing ATP

What is the hereditary material found in all cells?

• RNA

• DNA

• Proteins

• Lipids

What type of cells lack a nucleus?

• Eukaryotic cells

• Prokaryotic cells

• Plant cells

What structure in prokaryotic cells contains the single circular chromosome?

• Nucleus

• Nucleoid

• Ribosome

• Plasmid