Biological Membranes and Cellular Processes Quiz

What is the property of biological membranes that allows some substances to cross more easily than others?

• Selective permeability

• Amphipathic

• Fluid mosaic model

• Integral proteins

Which molecule has both a hydrophilic region and a hydrophobic region?

• Glycolipids

• Amphipathic

• Transport proteins

• Glycoproteins

What is the term for the movement of molecules from an area of higher concentration to an area of lower concentration?

• Osmosis

• Active transport

• Diffusion

• Facilitated diffusion

Which type of protein is integrated into the phospholipid bilayer and forms membrane channels?

• Peripheral proteins

• Integral proteins

• Glycoproteins

• Channel proteins

What is the process called when a cell surrounds a substance in the outside environment, enclosing it in a portion of the plasma membrane?

• Pinocytosis

• Phagocytosis

• Endocytosis

• Exocytosis

Which protein transfers phosphate groups from ATP to a protein?

• Ligand-gated ion channel

• Protein phosphatases

• G protein

• Protein kinases

What is the term for the diffusion of water across a semipermeable membrane?

• Facilitated diffusion

• Active transport

• Tonicity

• Osmosis

Which transport protein specifically facilitates the diffusion of water across the membrane?

• Aquaporins

• Sodium-potassium pump

• Ion channels

• Gated channels

What is the term for the charge difference between a cell's cytoplasm and the extracellular fluid?

• Membrane potential

• Turgor pressure

• Electrochemical gradient

• Concentration gradient

Which process involves the uptake of liquids by engulfing a sample of the external medium into a pocket of the plasma membrane?

• Phagocytosis

• Exocytosis

• Pinocytosis

• Receptor-mediated endocytosis