Biology - Study Guide
8th Edition
ISBN: 9780321501561
Author: Martha R. Taylor
Publisher: PEARSON EDUCATION (COLLEGE)
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Chapter 19, Problem 6TYK
Summary Introduction
Introduction: Viruses are infectious agents that cannot be seen through the naked eyes. The genetic material of viruses is either DNA or RNA. A virus that has RNA as its genetic material is known as an RNA virus. The
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Which of the following does NOT inititiate DNA synthesis?
a. a single-stranded DNA virus.
b. a (-) single stranded RNA virus
c. a (+) single stranded RNA virus
d. a double-stranded DNA virus (Poxviridae)
e. Both (-) and (+) single-stranded RNA viruses
Which is the part of the virus that attaches to the host cell?
a. Exterior proteins
b. Capsid proteins
c. Lipid envelope
d. mRNA
Chapter 19 Solutions
Biology - Study Guide
Ch. 19 - In the following diagram of lytic and lysogenic...Ch. 19 - Summarize the flow of genetic information during...Ch. 19 - How does a virus spread throughout a plant? Are...Ch. 19 - Create a concept map that describes the lytic and...Ch. 19 - Prob. 2SYKCh. 19 - Prob. 1TYKCh. 19 - Prob. 2TYKCh. 19 - Prob. 3TYKCh. 19 - Prob. 4TYKCh. 19 - T2 and T4 are two types of bacteriophage that...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Which statement is true? a. A virion contains DNA and RNA. b. Viruses are acellular. c. Viruses replicate outside of the cell. d. Most viruses are easily visualized with a light microscope.arrow_forwardHIV is a retrovirus what does this mean? A. That is a DNA virus and it must make RNA before it can make proteins. B. That it is an RNA virus and must convert its genetic material to DNA once it enters a cell. C. That is was a virus discovered in the recent past D. That is an RNA virus and goes directly to ribosomes of host cells to reproduce Please explain your answer!arrow_forwarda. Since viruses lack metabolic enzymes, how can they synthesize necessary components? b. Name some enzymes that viruses may have for invading and completing their cycles.arrow_forward
- Why do viruses need to infect a host? A. In order to reproduce B. In order to grow from eggs to adult viruses C. In order to eat other viruses D. In order to properly socialize with other virusesarrow_forwardWhy don’t scientists usually consider viruses living? A.They do not have DNA B.They do not have cells C.They cannot reproducearrow_forwardWhich statement is true of viral replication? a. In the process of apoptosis, the cell survives. b. During attachment, the virus attaches at specific sites on the cell surface. c. The viral capsid helps the host cell produce more copies of the viral genome. d. mRNA works outside of the host cell to produce enzymes and proteins.arrow_forward
- Viruses consist of either DNA or RNA wrapped inside a protein coat. Are viruses considered alive? A. Yes, because they contain DNA. B. Yes, because they contain DNA and proteins. C. No, because they lack carbohydrates and lipids. D. No, because some viruses use RNA as the main genetic molecule.arrow_forwardWhy do viruses need to infect a host? A. In order to eat other viruses B. In order to reproduce C. In order to grow from eggs to adult viruses D. In order to properly socialize with other virusesarrow_forwardAn experimental drug therapy to treat patients with antibiotic-resistant bacteria involves introduction of a highly specific bacteriophage to the infected patient's bloodstream. Which of the following bacteriophage types would be the LEAST useful for this therapy? a. a lytic bacteriophage b. An enveloped virus c. An RNA virus d. a lysogenic bacteriophagearrow_forward
- Which is true of DNA viruses? a. They use the host cell’s machinery to produce new copies of their genome. b. They all have envelopes. c. They are the only kind of viruses that can cause cancer. d. They are not important plant pathogens.arrow_forwardWhich of the following does NOT inititiate DNA synthesis ? (correct answer e) a. a single-stranded DNA virus. b. a (-) single stranded RNA virus c. a (+) single stranded RNA virus d. a double-stranded DNA virus (Poxviridae) e. Both (-) and (+) single-stranded RNA virusesarrow_forwardIn the case of the Ebola outbreak in the Democratic Republic of the Congo (then called Zaire) in 1976, how did the virus first transmit to humans? A. A teacher ate a wild bat B. A teacher ate a wild antelope C. Scientists are still unsure D. A mosquito bit a teacherarrow_forward
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