5 - Biology Concepts and Connections 6e(Campbell Chapter 5...

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Unformatted text preview: Biology: Concepts and Connections, 6e (Campbell) Chapter 5 1 The Working Cell Multiple-Choice Questions 1) Many of the enzymes that control a deep-sea firefly squid's ability to produce light energy from chemical energy are located A) in membranes. B) in the nucleus. C) within chloroplasts. D) outside of cells. E) within mitochondria. Answer: A Topic: Opening Essay Skill: Factual Recall 2) The fluid mosaic model describes the plasma membrane as consisting of A) a phospholipid bilayer with embedded carbohydrates. B) two layers of phospholipids with protein sandwiched between them. C) a protein bilayer with embedded phospholipids. D) carbohydrates, proteins, and phospholipids that can drift in the membrane. E) individual proteins and phospholipids that can drift in a phospholipid bilayer. Answer: E Topic: 5.1 Skill: Factual Recall 3) Membran e phospholipids A) have hydrophobic heads that face the center of the membrane and are shielded from water. B) have hydrophilic tails that face outward and are exposed to water. C) often have "kinks" in their tails caused by the presence of a double bond between carbons. D) remain fluid because they are tightly packed against one another. E) form impermeable layers for cells . Answer: C Topic: 5.1 Skill: Factual Recall 4) The cholesterol associated with animal cell membranes A) is attached to membrane proteins and extends into the watery environment surrounding the cell. B) helps to stabilize the cell membrane at body temperature. C) makes the cell membrane fluid at room temperature. D) is an abnormality resulting from a diet high in cholesterol. E) helps solidify the membranes when the room temperature is below freezing. Answer: B Topic: 5.1 Skill: Factual Recall 5) A major function of glycoproteins and glycolipids in the cell membrane is to A) glue cells together to form tissues. B) allow the cells of an embryo to sort themselves into tissues and organs. C) attach the cell membrane to the cytoskeleton. D) help the cell resist swelling. E) help the cell retain its shape. Answer: B Topic: 5.1 Skill: Factual Recall 6) When physician s perform an organ transplant, they choose a donor whose tissues match those of the recipient as closely as possible. Which of the following cell components are being matched? A) plasma membrane phospholipids B) plasma membrane proteins C) cell-surface carbohydrates D) plasma membrane cholesterols E) cytoskeletal elements Answer: C Topic: 5.1 Skill: Application 7) Most of the functions of a cell membrane are performed by A) glycolipids. B) proteins. C) phospholipids. D) cholesterol. E) nucleotides. Answer: B Topic: 5.1 Skill: Factual Recall 8) Which of the following statements regarding membrane protein function is false ? A) Membrane proteins serve as enzymes. B) Membrane proteins act as receptors to molecules like hormones. C) Membrane proteins provide cellular identification tags. D) Membrane proteins form junctions between cells. E) Membrane proteins transfer genetic information to the cytoplasm. Answer: E Topic: 5.1 Skill: Factual Recall 9) Relaying a message from a membrane receptor to a molecule that performs a specific function within a cell is called A) signal transduction. B) inhibition. C) competition. D) self-recognition. E) selective permeability. Answer: A Topic: 5.1 Skill: Factual Recall...
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This note was uploaded on 02/12/2011 for the course BIOL biology taught by Professor Ahmed during the Spring '11 term at Arizona Western College.

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5 - Biology Concepts and Connections 6e(Campbell Chapter 5...

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