1) Which of the following is a function of the cell membrane? a) Packaging and sorting proteins b) Removing waste and worn out cells c) Regulating the flow of materials into and out of the cell 2) Another name for the cell membrane is a) Oligosaccharide chain b) Hydrophobic layer c) Plasma membrane 3) The cell membrane is constructed mainly of a) Protein b) Phospholipids c) Cholesterol 4) Phospholipids are composed of __________ head and ___________ tails. a) Sugar, fatty acid b) Phosphate, phosphate c) Phosphate, fatty acid 5) The heads of the phospholipids are considered to be a) Hydrophilic b) Hydrophobic 6) The tails of the phospholipids are considered to be a) Hydrophilic b) Hydrophobic 7) The cell membrane contains phospholipids that arrange themselves with the heads facing outward and the tails facing inward. a) True b) False 8) The cell membrane is considered to be selectively permeable, which means a) It only allows certain molecules to pass through b) It allows everything to pass through c) It does not allow anything to pass through 9) Short, branched chains of glucose monomers found on the outside of the cell membrane are called a) Glycoproteins b) Oligosaccharides c) Cholesterols 10) Glycolipids are a phospholipid with a _______ attached to the surface a) Protein b) Lipid c) Sugar 11) Glycoproteins are embedded in the lipid bilayer and act as ________ for the cell membrane a) Guards b) Receptors c) Transport 12) Proteins that are partially inserted into the plasma membrane are called a) Integral proteins b) Glycolipids c) Peripheral proteins 13) Proteins that span the entire membrane and act as channels through the cell membrane are called? a) Peripheral proteins b) Transmembrane proteins c) Phospholipids 14) Peripheral proteins interact with the hydrophobic core of the plasma membrane. a) True b) False 15) Cholesterol is found in the plasma membrane, at low temperatures it prevents ________ a) Signal molecules from being released b) Fatty acid tails from packing together c) Fluidity and movement of phospholipids 16) Cholesterol is found in the plasma membrane, at high temperatures it prevents ________ a) Signal molecules from being released b) Fatty acid tails from packing together c) Fluidity and movement of phospholipids 17) A ________ is something that can be dissolved. a) Solute b) Solvent c) Dilute 18) Water is considered the universal ______ because it can dissolve almost everything. a) Solute b) Solvent c) Dilute 19) What is the best definition of equilibrium? a) Slightly higher concentration outside the cell compared to the inside of the cell. b) Equal concentrations of a substance inside and outside of the cell. c) Slightly lower concentration inside the cell compared to the outside of the cell 20) The function of cell transport is to move a) Materials into and out of the cell b) Cells around the body c) Organelles around inside the cell 21) Which of the following is not true about passive transport a) The movement of molecules from [ low ] to [ high ] b) Energy is not required for transport c) Transmembrane proteins help move molecules 22) Which if the following is an example of passive transport a) Exocytosis b) Osmosis c) Bulk transport 23) The membrane is required for simple diffusion. a) True b) False 24) During simple diffusion, particles pass through a) Transmembrane proteins b) Phospholipids c) Transport proteins 25) Facilitated diffusion requires help from ______ that are found in the cell membrane a) Transmembrane proteins b) Peripheral proteins c) Cholesterols 26) Osmosis is the movement of ______ from [ high ] to [ low ] until homeostasis is reached. a) Particles b) Water c) Salt 27) Pouring salt on a slug causes it to shrink, this is an example of a _________ concentration. a) Hypertonic b) Hypotonic c) Isotonic 28) A cell has been surrounded by water. Over time the cell swells or expands and the solutions outside and inside of the cell become equal. This is an example of a _______ concentration. a) Hypertonic b) Hypotonic c) Isotonic 29) A red blood cell is in an isotonic concentration, what does this mean for the concentrations inside and outside of the cell a) [ outside ] > [ inside ] b) [ outside ] < [ inside ] c) [ outside ] = [ inside ] 30) The movement of molecules from [ low ] to [ high ] concentration until equilibrium is called a) Passive Transport b) Active Transport c) Cell Transport 31) Active transport requires _______, passive transport does not. a) Membranes b) Transport c) Energy 32) _________ is the movement of a lot of molecules at one time a) Active transport b) Bulk transport c) Cell Transport 33) Endocytosis moves materials _____ the cell, exocytosis moves things ___ the cell. a) Out of, Into b) Into, Out of

Unit 4: Cell membrane and transport

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