The Cellular Level of Organization

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Chapter 3: The Multiple Choice 1. a. b. c. d. e. 2. a. b. c. d. e. 3. a. b. c. d.

Cellular Level of Organization

What are the three main parts of a eukaryotic cell? Plasma membrane, organelles, cytoplasm Plasma membrane, organelles, nucleus Plasma membrane, cytoplasm, organelles Plasma membrane, cytoplasm, nucleus Plasma membrane, cytosol, organelles Plasma membranes consist of what three components? Phospholipids, glycoproteins, water Proteins, cholesterol, fatty acids Cholesterol, fatty acids, glycolipids Proteins, phospholipids, cholesterol Water, proteins, fatty acids What are the nonpolar parts of a phospholipid? Head group Tail group Both are nonpolar Neither are nonpolar

4. This is the only polar portion of a cholesterol molecule and it forms hydrogen bonds with the polar heads of phospholipids. a. –OH group b. –CH3 group c. –CH4 group d. –OOH group e. None of the above 5. This type of membrane protein will extend throughout the entire membrane touching both the Intracellular fluid and the Extracellular fluid. a. Integral proteins b. Transmembrane proteins c. Phospholipids d. Integral proteins and Transmembrane proteins e. All of the above 6. This portion of the cell membrane enables cell membranes to produce chemical products. a. Receptors b. Phospholipids c. Cholesterol d. Enzymes e. Ligand 7. Which of the following is a function of a membrane protein that binds with hormones and neurotransmitters? a. Transporters b. Receptors c. Enzymes d. Linkers e. Cell Identification markers

Dr. D.

Houston Community College

Page 1

8. This type of membrane protein helps to anchor proteins in the plasma membrane of neighboring cells to one another. a. Transporters b. Receptors c. Ligand d. Ion channels e. Linkers 9. The characteristic of plasma membranes allowing only some substances to move through is known as _________________ a. Selective permeability b. Concentration gradient c. Electrical gradient d. Solubility e. Transportation 10. a. b. c. d. e. 11. a. b. c. d. e. Which of the following does NOT influence the rate of diffusion? Steepness of the concentration gradient Mass of the diffusing substance Charge of the diffusing substance Amount of ATP available Temperature This is the transport process by which gases move through a membrane. Osmosis Active transport Secondary active transport Simple diffusion Endocytosis

12. In this type of transport process a solute, like Glucose, binds to a specific transporter protein on one side of the membrane and is released on the other side after the transporter protein undergoes a change in shape. a. Osmosis b. Active transport c. Secondary active transport d. Facilitated diffusion e. Endocytosis 13. In this transport process, the energy from hydrolysis of ATP is used to drive substances across the membrane against their own concentration gradients. a. Primary active transport b. Secondary active transport c. Facilitated diffusion d. Passive diffusion e. Osmosis 14. If the solute concentration is greater in the solution on the inside of the cell, compared to the solute concentration of the solution that is outside the cell, then what direction will water move? a. into the cell b. out of the cell c. no movement

Dr. D.

Houston Community College

Page 2

15. In this transport process, the energy stored in Na+ or H+ concentration gradient is used to drive other substances across the membrane against their own concentration gradients. a. Primary active transport b. Secondary active transport c. Facilitated diffusion d. Passive diffusion 16. This is a transport process by which cells secrete materials, within vesicles, into the extracellular fluid. a. Endocytosis b. Exocytosis c. Active transport d. Diffusion 17. This is a transport process by which cells take up extracellular substances within vesicles.. a. Endocytosis b. Exocytosis c. Active transport d. Diffusion 18. This is an extension of the plasma membrane that will surround a particle outside the...
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