Biology
Biology
11th Edition
ISBN: 9781259188138
Author: Peter H Raven, George B Johnson Professor, Kenneth A. Mason Dr. Ph.D., Jonathan Losos Dr., Susan Singer
Publisher: McGraw-Hill Education
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Chapter 27, Problem 8A
Summary Introduction

Introduction:

SARS coronavirus belongs to class IV that contain plus single stranded RNA as their genetic material. They are enveloped virus that contains lipid particles on their envelope. The SARS causes the severe acute respiratory syndrome in humans.

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A researcher, studying two different animal viruses (A and B) that infect the same cell type, digests away all the protein and transfers the nucleic acid directly into the host cell.  Only virus B causes the infection. This suggests:        a. Virus A is likely to be a naked virus.         b. Virus A is likely to be an enveloped virus.         c. Virus A is likely to be a -ssRNA virus.         d. Virus A is likely to be a +ssRNA virus.         e. Virus A is likely to be a dsDNA virus.  And now explain why.
Which of the following statements about viruses is false? a. Viruses require a host cell to reproduce. b. Viruses are sensitive to interferons. c. Viral infections can generally be controlled with antibiotics. d. Viruses encode their own genome.
Which of the following statements is not true?        Select one: a. Viruses multiply inside living cells using viral - mRNA, tRNA & ribosomes. b. Viruses multiply inside living cells. c. Viruses contain DNA or RNA. d. The nucleic acid of a virus is surrounded by a protein coat. e. Viruses cause the synthesis of specialized infectious elements.
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