Cell Structure and Function

Which of the following best defines selective permeability?

• Allows all substances to pass freely
• Blocks all substances completely
• Only allows water to pass
• Allows some substances to pass while blocking others

Which organelle is NOT considered part of the endomembrane system?

• Endoplasmic reticulum
• Lysosome
• Vacuole
• Mitochondria

What is the term for the passive movement of molecules assisted by specific proteins?

• Active transport
• Osmosis
• Simple diffusion
• Facilitated diffusion

What determines whether a molecule can passively diffuse through the membrane?

• Color and shape
• Density and mass
• Charge only
• Size and polarity

Which system coordinates the functions of the endoplasmic reticulum, Golgi apparatus, lysosomes, and vacuoles?

• Respiratory system
• Photosynthetic system
• Cytoskeletal system
• Endomembrane system