19 - CHAPTER 19 1) The simplest infectious biological...

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CHAPTER 19 AP BIOLOGY 1) The simplest infectious biological systems are A) viruses. B) bacteria. C) viroids. D) A and B. E) B and C. 2) Which of the following is a true statement about viruses? A) Viruses are classified below the cellular level of biological organization. B) Even small virus particles are visible with light microscopes. C) A single virus particle contains both DNA and RNA. D) A and B only are true. E) A, B, and C are true. 3) A researcher lyses a cell that contains nucleic acid molecules and capsid units of tobacco mosaic virus (TMV). The cell contents are left in a covered test tube overnight. The next day this mixture is sprayed on tobacco plants. Which of the following would be expected to occur? A) The plants would develop symptoms typically produced by viroids. B) The plants would not show any disease symptoms. C) The plants would develop the typical symptoms of TMV infection. D) The plants would develop some but not all of the symptoms of the TMV infection. E) The plants would become infected, but the sap from these plants would be unable to infect other plants. 4) Which of the following is a characteristic of all viruses? A) a protein capsid B) nucleic acid genome C) glycoprotein cell wall D) A and B only E) A, B, and C 5) Viruses have some of the properties of living organisms. Which of the following is a characteristic of all organisms, but not of viruses? A) structure includes proteins B) ability to control metabolism C) genetic information stored as nucleic acid D) ability to reproduce E) plasma membrane 6) The host range of a virus is determined by A) the structure of the viral capsid. B) whether the virus nucleic acid is DNA or RNA. C) proteins on the surface of the cell. D) enzymes produced by the virus before it infects the cell. E) both A and C. 7) Viruses are referred to as obligate parasites because A) they reproduce and then exit the cell. B) they use the host's energy to live. C) viral DNA inserts itself into host DNA. D) they are nonliving. E) they use the host cell's nucleotides and enzymes to reproduce. 8) The phage DNA is not hydrolyzed with the host DNA because A) phage DNA contains an urecognizable form of cytosine. B) a protein sheath protects phage DNA. C) phage DNA remains outside the host cell. D) the host cell ceases to function. E) lysozyme releases phage particles before hydrolysis can occur.
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CHAPTER 19 AP BIOLOGY 9) Double-stranded viruses can reproduce the lytic cycle and the lysogenic cycle. Which of the following is characterstic of the lytic cycle? A) The viral genome replicates without destroying the host. B) The virus-host relationship usually lasts for generations. C) Many bacterial cells containing viral DNA are produced. D) Viral DNA is incorporated into the host chromosomes.
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This note was uploaded on 02/26/2011 for the course BIO 104 taught by Professor Smith during the Spring '11 term at Saddleback.

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19 - CHAPTER 19 1) The simplest infectious biological...

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