Betsy T., Keogh J. Microbiology Demystified
Подождите немного. Документ загружается.
54. What enables scientists to take nucleotide fragments from other DNA
and reassemble fragments into a new nucleotide sequence?
(a) enzyme DNA technology
(b) enzyme technology
(c) recombinant DNA technology
(d) recombinant enzyme technology
55. The result of two incisions made in a double-helical segment is called
(a) overhang
(b) recognition sequence
(c) restriction enzymes
(d) restriction fragment
56. Restriction enzymes are used to cut double stranded DNA along the exte-
rior of the strand.
(a) True
(b) False
57. What is another name for a restriction endonuclease?
(a) plasmid
(b) vector
(c) agarose gel
(d) restriction enzyme
58. The nucleotide genome consists of the seven nucleic acids that encode
genetic information on RNA.
(a) True
(b) False
59. The end of the cut of a double-helical segment is called _________ in
certain enzymes.
(a) restriction enzymes
(b) overhang
(c) recognition sequence
(d) restriction fragment
60. The four nucleotides are adenine (A), cytosine (C), guanine (G), and
thymine (T).
(a) True
(b) False
Final Exam
257
c17_betsy_final exam.qxd 5/9/05 6:11 PM Page 257
61. Which of the following is not a type of RNA?
(a) rRNA
(b) uRNA
(c) tRNA
(d) mRNA
62. An operon consists of structural DNA, regulatory RNA, and control cells.
(a) True
(b) False
63. What process begins protein synthesis?
(a) transcription
(b) translation
(c) polypeptide
(d) genotyping
64. The point at which the double-stranded DNA molecule unwinds is called
polymerase.
(a) True
(b) False
65. What is the promotor site?
(a) A site where RNA polymerase binds to DNA.
(b) A site where RNA polymerase binds to protein.
(c) A site where RNA polymerase binds to free nucleotides.
(d) A site where RNA polymerase binds to ATP.
66. The unexpressed properties of heredity are called the
(a) genotype
(b) exons
(c) introns
(d) phenotype
67. An RNA polymerase is an enzyme that is used in the synthesis of RNA.
(a) True
(b) False
68. The three nucleotide units withing the mRNA strand are called exons.
(a) True
(b) False
Final Exam
258
c17_betsy_final exam.qxd 5/9/05 6:11 PM Page 258
69. An incubatory carrier is an individual who transmits the disease before
becoming symptomatic.
(a) True
(b) False
70. The number of people infected by a disease at any point in time is called
the
(a) incidence
(b) morbidity rate
(c) prevalence
(d) none of the above
71. Morbidity rate is the number of people is a given population who
are ill.
(a) True
(b) False
72. When there are small isolated occurrences of a disease reported it is
called a
(a) pandemic
(b) source epidemic
(c) sporadic disease
(d) propagated epidemic
73. A disease is called an epidemic when there is a worldwide distribution of
the disease.
(a) True
(b) False
74. When large numbers of a population are infected suddenly from a com-
mon source it is called a
(a) pandemic
(b) sporadic disease
(c) propagated epidemic
(d) none of the above
75. The carrier period is the period of time when a disease is contagious and
communicable before showing signs and symptoms and during recovery.
(a) True
(b) False
Final Exam
259
c17_betsy_final exam.qxd 5/9/05 6:11 PM Page 259
76. The sum of old and new cases of a disease is called
(a) incidence
(b) prevalence rate
(c) morbidity rate
(d) prevalence
77. Convalescent carriers are individuals who develop chronic infections and
transmit them for long periods of time.
(a) True
(b) False
78. A lytic virus injects nucleic acid into a host cell.
(a) True
(b) False
79. A bacteriophage is
(a) a virus that can be killed by antibiotics
(b) a virus that acts like a bacterium
(c) a bacterium that acts like a virus
(d) none of the above
80. A small infectious particle that contains a protein is called a
(a) viroid
(b) capsid
(c) viron
(d) none of the above
81. What is a capsid?
(a) A capsid is the membrane bilayer of a virus.
(b) A capsid is the protein coat that encapsulates a virus.
(c) A capsid is another name for a bacteriophage.
(d) A capsid is the envelope around a virus.
82. A free virus particle is
(a) another name for a virus
(b) a synthesized virus
(c) a viron
(d) a mature virus
Final Exam
260
c17_betsy_final exam.qxd 5/9/05 6:11 PM Page 260
83. Pieces of the host cell's membrane make
(a) the capsid
(b) the envelope of a virus
(c) the nuclei of the virus
(d) the nuclei of the host cell
84. The central nucleic acid contains the genetic information of a virus.
(a) True
(b) False
85. Oncogenic viruses
(a) cause herpes
(b) cause the common cold
(c) cause tumors
(d) none of the above
86. A naked virus is a virus without a capsid.
(a) True
(b) False
87. A state of lysogeny occurs when the envelope of a virus interacts with the
capsid.
(a) True
(b) False
88. What are protists?
(a) hemoflagellates
(b) nematodes
(c) proglottids
(d) scolex
89. Mushrooms are
(a) protozoa
(b) fungi
(c) helminths
(d) algae
Final Exam
261
c17_betsy_final exam.qxd 5/9/05 6:11 PM Page 261
90. Which is not a layer of the body of helminths?
(a) mesoderm
(b) ectoderm
(c) exoderm
(d) endoderm
91. Stipes support
(a) blades
(b) thallus
(c) algae
(d) photoautotrophs
92. What is the method used by multicellular algae to reproduce?
(a) cytokinesis
(b) scolex
(c) nematodes
(d) none of the above
93. Fungi are different from plants because plants absorb nutrients from
organic matter.
(a) True
(b) False
94. Some protists use cilia to move food into a mouth-like opening called
(a) pseudopods
(b) mesoderm
(c) vacuole
(d) none of the above
95. What are flatworms?
(a) platyhelminths
(b) nematodes
(c) ringhelminths
(d) hookhelminths
96. A helminth is an alga.
(a) True
(b) False
Final Exam
262
c17_betsy_final exam.qxd 5/9/05 6:11 PM Page 262
97. A pneumatocyst is
(a) a gas-filled bladder that enables algae to float
(b) a way for protozoa to absorb nutrients
(c) something that anchors fungi to rocks
(d) something that enables helminths to reproduce
98. A serum that contains most antibodies is called gamma globulin.
(a) True
(b) False
99. What kind of immunity uses specialized lymphocyte cells called T cells?
(a) antibody-mediated immunity
(b) epitopes
(c) cell-mediated immunity
(d) none of the above
100. Immunity in which antibodies are developed outside the organism in an
immune serum is called active naturally acquired immunity.
(a) True
(b) False
Final Exam
263
c17_betsy_final exam.qxd 5/9/05 6:11 PM Page 263
c17_betsy_final exam.qxd 5/9/05 6:11 PM Page 264
This page intentionally left blank.
265
Answers to Quiz
and Exam Questions
CHAPTER 1
1. a 2. d 3. d 4. a 5. a
6. c 7. c 8. b 9. a 10. b
CHAPTER 2
1. d 2. c 3. d 4. c 5. b
6. b 7. a 8. a 9. a 10. c
CHAPTER 3
1. a 2. a 3. c 4. d 5. c
6. a 7. a 8. a 9. c 10. b
c18_betsy_answers to quiz.qxd 5/9/05 6:12 PM Page 265
Copyright © 2005 by The McGraw-Hill Companies, Inc. Click here for terms of use.
CHAPTER 4
1. b 2. d 3. a 4. b 5. c
6. c 7. b 8. c 9. c 10. b
CHAPTER 5
1. a 2. b 3. a 4. b 5. b
6. b 7. c 8. a 9. c 10. c.
CHAPTER 6
1. b 2. a 3. c 4. b 5. b
6. a 7. c 8. d 9. a 10. c
CHAPTER 7
1. a 2. b 3. d 4. b 5. a
6. a 7. b 8. d 9. a 10. b
CHAPTER 8
1. a 2. c 3. b 4. d 5. a
6. c 7. a 8. c 9. a 10. a
CHAPTER 9
1. a 2. c 3. a 4. b 5. d
6. a 7. c 8. b 9. a 10. a
CHAPTER 10
1. a 2. c 3. d 4. a 5. b
6. a 7. c 8. d 9. a 10. b
Answers
266
c18_betsy_answers to quiz.qxd 5/9/05 6:12 PM Page 266