Lesson 3

What is the basic unit of all living things?

• Cell
• Nucleus
• Cytoplasm
• Organelles

What forms the outer boundary of the cell?

• Plasma membrane
• Nucleus
• Cytoplasm
• Organelles

What directs the cell activities?

• Nucleus
• Plasma membrane
• Cytoplasm
• Organelles

Where is the cytoplasm located?

• Between plasma membrane and nucleus
• Inside the nucleus
• Inside the mitochondria
• Outside the cell

What performs specialized functions within the cell?

• Organelles
• Cytoplasm
• Nucleus
• Cell

Which of the following are types of microscopes?

• Light microscope
• Electron microscope
• Scanning microscope
• Transmission microscope

Which microscope visualizes general cell features?

• Light microscope
• Transmission microscope
• Electron microscope
• Dissecting microscope

Which microscope is used for studying fine cell structures?

• Electron microscope
• Light microscope
• Phase contrast microscope
• Dissecting microscope

What substance accounts for 45-50% of cell membrane composition?

• Lipids
• Proteins
• Carbohydrates
• Nucleic acids

What is the function of membrane cholesterol?

• Stabilizes membrane
• Acts as a barrier
• Repairs membrane
• Increases flexibility