Quiz - Chapter 6 (Cell Membrane)
What happens to a cell in a hypertonic solution? A) The cell becomes very thin and undergoes plasmolysis. B) The cell grows in size and might burst in a process called cytolysis. C) Water moves into the cell, making the net movement zero. D) Water moves out of the cell, making the cell shrink.
Answer: A and D
What are the two types of proteins involved in facilitated diffusion? A) Channel proteins and carrier proteins B) Channel proteins and receptor proteins C) Transporter proteins and carrier proteins D) Transporter proteins and receptor proteins
Answer: A) Channel proteins and carrier proteins
Which type of binding involves cells using the same protein to form a bond? A) Homotypic binding B) Heterotypic binding C) Extrinsic binding D) Integral binding
Answer: A) Homotypic binding
What are the three forms of cell junctions? A) Tight junctions, anchoring junctions, and gap junctions B) Extracellular matrix, transmembrane proteins, and cell adhesion molecules C) Passive transport, active transport, and secondary active transport D) Homotypic binding, heterotypic binding, and glycolipids
Answer: A) Tight junctions, anchoring junctions, and gap junctions
What is the main difference between channel and carrier proteins? A. Channel proteins provide a pore for substances to move across the membrane, while carrier proteins bind to and transport substances across the membrane. B. Channel proteins allow movement of substances in only one direction, while carrier proteins allow movement of substances in both directions. C. Carrier proteins expend energy to pump substances across the membrane against a concentration gradient, while channel proteins provide passage via facilitated diffusion of substances without expending energy. D. Carrier proteins provide a means for large, polar substances to move across the membrane, while channel proteins provide a means for small, nonpolar substances to pass through the membrane.
Answer: A. Channel proteins provide a pore for substances to move across the membrane, while carrier proteins bind to and transport substances across the membrane.
What happens when Na+ enters the cell with the help of Secondary Active transport? A. It takes with it other molecules when entering, like sugars B. It moves out of the cell, against the concentration gradient C. It combines with K+ to form a salt D. It becomes a part of the lipid bilayer
Answer: A. It takes with it other molecules when entering, like sugars
skip
Answer: B) Recognition sites
What happens to a cell in a hypotonic solution? A) The cell becomes very thin and undergoes plasmolysis. B) The cell grows in size and might burst in a process called cytolysis. C) Water moves into the cell, making the net movement zero. D) Water moves out of the cell, making the cell shrink.
Answer: B) The cell grows in size and might burst in a process called cytolysis.
Where does the energy come from for Secondary Active transport? A. Hydrolysis of ATP B. The ion concentration gradient established by Primary Active transport C. The movement of water molecules D. The binding of carrier proteins
Answer: B. The ion concentration gradient established by Primary Active transport
skip
Answer: C) Integral membrane proteins
What is the term used to describe a solution in which there is an equal concentration of solutes on both sides of a membrane? A) Hypertonic B) Hypotonic C) Isotonic D) Cytolysis
Answer: C) Isotonic
What happens to an animal cell when placed in a hypotonic solution? A) It shrinks B) It stays the same size C) It bursts D) It becomes rigid
Answer: C) It bursts
What is the function of tight junctions? A) Connect neighboring cells together B) Create a strong but flexible sheet of cells C) Seal cells tightly to form a barrier D) Allow small molecules to pass through the membrane
Answer: C) Seal cells tightly to form a barrier
What is facilitated diffusion? A) The active movement of molecules along the concentration gradient facilitated by proteins B) The passive movement of molecules against the concentration gradient facilitated by proteins C) The passive movement of molecules along the concentration gradient facilitated by proteins D) The active movement of molecules against the concentration gradient facilitated by proteins
Answer: C) The passive movement of molecules along the concentration gradient facilitated by proteins
What is the term used to describe a measure that compares the concentration of solutes inside and outside the cell? A) Osmosis B) Diffusion C) Tonicity D) Plasmolysis
Answer: C) Tonicity
What is the Sodium-Potassium Pump? A. A carrier protein that moves glucose across the membrane B. A uniport protein that moves sodium ions across the membrane C. An integral membrane antiport protein that moves substances in opposite directions D. A symport protein that moves potassium ions into the cell
Answer: C. An integral membrane antiport protein that moves substances in opposite directions
What type of substances do carrier proteins transport across the membrane? A. Nonpolar substances B. Small ions C. Polar molecules D. Large proteins
Answer: C. Polar molecules.
Which of the following is true about ion channels? A. They are activated by a physical stimulus B. They are activated by a change in voltage C. They are activated by a chemical signal D. They are activated by a change in temperature
Answer: C. They are activated by a chemical signal.
What is the function of the Sodium-Potassium Pump? A. To pump 3 K+ out of the cell and 2 Na+ into the cell B. To pump 2 K+ out of the cell and 3 Na+ into the cell C. To pump 3 Na+ out of the cell and 2 K+ into the cell D. To pump 2 Na+ out of the cell and 3 K+ into the cell
Answer: C. To pump 3 Na+ out of the cell and 2 K+ into the cell
What is the difference between passive and active transport? A) Passive transport requires energy, while active transport does not B) Active transport moves materials from an area of higher concentration to the lower, while passive transport does not C) Passive transport moves materials from an area of higher concentration to the lower, similar to active transport D) Active transport moves materials from an area of lower concentration to the higher, while passive transport does not
Answer: D) Active transport moves materials from an area of lower concentration to the higher, while passive transport does not
Which of the following is not a type of tonicity? A) Hypertonic B) Hypotonic C) Isotonic D) Mesotonic
Answer: D) Mesotonic
What is the purpose of gap junctions? A) To allow cells to stretch B) To connect neighboring cells together C) To serve as a barrier in the body D) To communicate and transfer molecules and ions between cells
Answer: D) To communicate and transfer molecules and ions between cells
Skip
Answer: D) Transmembrane proteins
Which of the following is NOT a role of membrane proteins? a) Facilitated/Passive Diffusion b) Active Transport c) Signal Transduction d) Connect Cells Together e) Markers for Cell Identification
Answer: NONE, all of these are exactly what membrane proteins do
What is the driving force for active transport? a) Against the concentration gradient b) With the concentration gradient c) Requires energy d) Requires a membrane protein
Answer: a) Against the concentration gradient
What are the two ways membrane proteins can be contained in the membrane? a) Extend across the membrane or attach to one side only b) Extend only to one side of the membrane c) Contained within the lipid bilayer d) Attached to the membrane by cholesterol molecules
Answer: a) Extend across the membrane or attach to one side only
Is facilitated diffusion specific? a) Yes b) No c) Requires energy d) Requires a membrane protein
Answer: a) Yes
How do cells recognize one another before they start binding? a) By recognizing the signals given by glycoproteins b) By recognizing the signals given by glycolipids c) By recognizing the signals given by integral proteins d) By recognizing the signals given by extrinsic proteins
Answer: b) By recognizing the signals given by glycolipids
A cell with 3% salt with a body of 2% salt, which way will water move? a) From the cell to the body b) From the body to the cell c) Water will not move d) It depends on the size of the cell.
Answer: b) From the body to the cell
In which environment will a cell have water move from outside towards the high concentration of solute inside the cell? a) Hypertonic b) Hypotonic c) Isotonic d) None of the above
Answer: b) Hypotonic
What is the driving force for simple diffusion? a) Against the concentration gradient b) With the concentration gradient c) Requires energy d) Requires a membrane protein
Answer: b) With the concentration gradient
How does cholesterol affect the fluidity of the cell membrane? a) It makes the membrane more fluid b) It has no effect on membrane fluidity c) It makes the membrane stiffer and less fluid d) It causes the membrane to break down
Answer: c) It makes the membrane stiffer and less fluid
Which of the following is NOT a component of the cell membrane? a) Phospholipids b) Cholesterol c) Nucleotides d) Proteins
Answer: c) Nucleotides
How do unsaturated and shorter fatty acid tails affect the fluidity of the membrane? a) They decrease the fluidity b) They have no effect on fluidity c) They increase the fluidity d) They make the membrane rigid
Answer: c) They increase the fluidity
Which of the following best describes why active processes require energy? a) They move substances with the concentration gradient b) They move substances through protein channels c) They move substances against the concentration gradient d) They move substances via facilitated diffusion
Answer: c) They move substances against the concentration gradient.
What is the function of the cell membrane? a) To control the movement of all molecules in and out of the cell b) To allow free movement of all molecules in and out of the cell c) To protect the cell from external factors d) To maintain the cell shape
Answer: c) To protect the cell from external factors
The plasma membrane has specialized channels called Aquaporin for the movement of which substance? a) Oxygen b) Carbon dioxide c) Water d) Ions
Answer: c) Water
Which process is required to move substances against their concentration gradient from low to high concentration? a) Simple diffusion b) Facilitated diffusion c) Osmosis d) Active transport
Answer: d) Active transport
What kind of protein carriers are involved in active transport? a) Uniports b) Symports c) Antiports d) All of the above
Answer: d) All of the above
Which of the following is NOT a form of passive transport? a) Simple diffusion through the lipid bilayer b) Facilitated diffusion through protein channels c) Facilitated diffusion through carrier proteins d) Antiport transport
Answer: d) Antiport transport
In what type of cells is Pinocytosis a constant process? a) Muscle cells b) Epithelial cells c) Nerve cells d) Endothelial (capillary) cells
Answer: d) Endothelial (capillary) cells
What is Pinocytosis in Endocytosis? a) Engulfing of molecules to form vesicles b) Folding in of the plasma membrane around the material c) Formation of a food vacuole or phagosome d) Formation of small vesicles to bring fluids into the cell
Answer: d) Formation of small vesicles to bring fluids into the cell
What is the main difference between integral and extrinsic membrane proteins? a) Integral proteins are hydrophilic, while extrinsic proteins are hydrophobic b) Integral proteins do not cross the whole bilayer, while extrinsic proteins do c) Extrinsic proteins are transmembrane, while integral proteins are not d) Integral proteins have both hydrophobic and hydrophilic amino acids, while extrinsic proteins have only hydrophilic amino acids
Answer: d) Integral proteins have both hydrophobic and hydrophilic amino acids, while extrinsic proteins have only hydrophilic amino acids
What fuses with a lysosome in Phagocytosis? a) The plasma membrane b) The vesicle membrane c) The food vacuole d) The phagosome
Answer: d) The phagosome
What is the function of carrier proteins in facilitated diffusion? a) They provide a pore for substances to move across the membrane b) They move substances in only one direction c) They pump substances across the membrane against a concentration gradient d) They bind to the substances they transport and change shape
Answer: d) They bind to the substances they transport and change shape
What is the function of carbohydrates in cell membranes? a) To regulate fluidity of the membrane b) To transport molecules across the membrane c) To provide structural support to the membrane d) To serve as recognition sites allowing cells to recognize one another
Answer: d) To serve as recognition sites allowing cells to recognize one another
What is the function of carbohydrates in cell membranes? A) Act as recognition sites B) Transport molecules across the membrane C) Strengthen cell connections D) Regulate membrane fluidity
Answer: A) Act as recognition sites
What is the term used to describe the general structure of membranes? a) Fluid mosaic b) Phospholipid bilayer c) Protein channel model d) Cholesterol framework
Answer: a) Fluid mosaic
What is the process used to bring molecules into the cell when they are too large for active transport? a) Osmosis b) Endocytosis c) Exocytosis d) Pinocytosis
Answer: b) Endocytosis
How does secondary active transport create the concentration gradient required for the movement of ions? a) Directly uses ATP b) Indirectly uses ATP c) Does not require ATP d) Uses selective protein carriers
Answer: b) Indirectly uses ATP
What is the other name for integral membrane proteins? a) Extracellular proteins b) Transmembrane proteins c) Peripheral proteins d) Hydrophobic proteins
Answer: b) Transmembrane proteins
What type of protein carrier is the Sodium-Potassium Pump? a) Uniport b) Symport c) Antiport d) Non-port
Answer: c) Antiport
What is the source of energy for primary active transport? a) Energy from glucose b) Energy from sunlight c) Energy from ATP d) Energy from oxygen
Answer: c) Energy from ATP
What is Phagocytosis in Endocytosis? a) Engulfing of molecules to form vesicles b) Folding in of the plasma membrane around the material c) Formation of a food vacuole or phagosome d) Constant acquisition of fluids by endothelial cells
Answer: c) Formation of a food vacuole or phagosome
When the substance being moved across the membrane is water, the process is called? a) Active transport b) Facilitated diffusion c) Osmosis d) Simple diffusion
Answer: c) Osmosis
Skip
Answer: c) Symports move two substances in the same direction, while antiports move a single substance in one direction
What is Exocytosis? a) Engulfing of molecules to form vesicles b) Folding in of the plasma membrane around the material c) Formation of a food vacuole or phagosome d) Vesicle membrane fusing with the plasma membrane or a pore forming
Answer: d) Vesicle membrane fusing with the plasma membrane or a pore forming
Quiz about Cell Membrane (Please Inform us if you find a mistake)
By the Open Book Team
