Biology: Life on Earth with Physiology (11th Edition)
11th Edition
ISBN: 9780133923001
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Chapter 1, Problem 4MC
Summary Introduction
Introduction:
Viruses are defined as the small infectious agents that are able to replicate inside the cell of living organisms. They lack the capacity to reproduce outside of host cell. It contains either DNA or RNA as a genetic material.
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Virusesa. have DNA confined in a nucleus.b. are relatively rare compared to living organisms.c. do not evolve.d. may be surrounded by plasma membrane from their host cell.
There is a big debate if viruses are alive or not.
Either way, look at the list below and pick out the accurate statements.
A.
Can only reproduce/replicate in a living cell.
B.
They have a protein coat surrounding and protecting the nucleic acid.
C.
Viruses have either DNA OR RNA - not both
D.
They sometimes have an envelope.
Which of the following is a reason that scientists do not classify viruses as living things?
A. They must infect a host because they cannot reproduce on their own.
B. They contain DNA, like all living organisms.
C. The experience evolution through natural selection.
D. They replicate themselves and reproduce
Chapter 1 Solutions
Biology: Life on Earth with Physiology (11th Edition)
Ch. 1.1 - Describe the source of the energy stored In the...Ch. 1.1 - Prob. 1CYLCh. 1.1 - explain why these characteristics are necessary to...Ch. 1.1 - describe how reproduction allows evolution to...Ch. 1.1 - The Boundaries of Life Are viruses alive? Viruses...Ch. 1.2 - explain what mutations are, how they occur, what...Ch. 1.2 - explain how natural processes lead inevitably to...Ch. 1.2 - describe how a new species can be produced by...Ch. 1.2 - The largest dinosaurs were plant-eaters. Based on...Ch. 1.3 - Prob. 1CYL
Ch. 1.3 - Prob. 2CYLCh. 1.3 - describe the fundamental differences between...Ch. 1.3 - What current, ongoing environmental change is...Ch. 1.4 - describe the principles underlying science?Ch. 1.4 - outline the scientific method?Ch. 1.4 - explain why controls are crucial in biological...Ch. 1.4 - explain why fundamental scientific principles are...Ch. 1.4 - distinguish between inductive and deductive...Ch. 1.4 - Prob. 1TCCh. 1.4 - Fruit flies, bacteria from hot springs, sea...Ch. 1.4 - The Boundaries of Life If viruses aren't a form of...Ch. 1 - Evolution is a. a belief. b. a scientific theory....Ch. 1 - Prob. 2MCCh. 1 - Prob. 3MCCh. 1 - Prob. 4MCCh. 1 - Which one of the following is True? a. The...Ch. 1 - Organisms respond to ________. Organisms acquire...Ch. 1 - Prob. 2FIBCh. 1 - Prob. 3FIBCh. 1 - Prob. 4FIBCh. 1 - Prob. 5FIBCh. 1 - Prob. 1RQCh. 1 - Prob. 2RQCh. 1 - Prob. 3RQCh. 1 - Prob. 4RQCh. 1 - What are some differences between prokaryotic and...Ch. 1 - What basic principles underlie scientific inquiry?Ch. 1 - Prob. 7RQCh. 1 - Prob. 8RQCh. 1 - Explain the differences between inductive and...Ch. 1 - List the steps in the scientific method with a...Ch. 1 - What misunderstanding causes some people to...Ch. 1 - Prob. 2ACCh. 1 - Review Alexander Flemings experiment that led to...Ch. 1 - Prob. 4ACCh. 1 - Prob. 5AC
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- Which of the following statements correctly describes viruses? Select one: A. They can reproduce by dividing. B. They cannot reproduce without a host cell. C. They have a genome similar to prokaryotic and eukaryotic cells. D. They can carry out their own metabolic activities.arrow_forward________ can have a genome of either RNA or DNA. a. Bacteria b. Eukaryotes c. Viruses d. Archaeaarrow_forwardWhich 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.arrow_forward
- Viruses are considered nonliving because Select one: A. They do not locomote. B. They can reproduce independently. C. Their nucleic acid does not code for protein. D. They are noncellular.arrow_forwardWhich of the following refer/s to viruses? A. They are disease-causing. B. They contain DNA or RNA. C. They must have protection for their own genetic material. D. They are parasitic. A, B, C only A, B, C, D A, C, D B, C, Darrow_forwardWhich of the following can be used to grow and study viruses? A. embryonated eggs B. living animals. C. cell cultures D. continuous cell lines such as HeLa cells.arrow_forward
- Based on devolution or the regressive hypothesis, it proposes to explain the origin of viruses by suggesting that they evolved from free-living cells. a. True b. Falsearrow_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_forwardA positive-strand RNA virus: a.must first be converted to a mRNA before viralproteins can be translated b.is not recognized by host ribosomes. c.can directly translate viral proteins. d.will be degraded by host enzymes. e.needs RNA dependent RNA polymerase to get converted into mRNAarrow_forward
- The genome of________ can be either RNA or DNA. a. a bacterium c. a virus b. a eukaryote d. an archaeonarrow_forwardMost viruses use their own virally encoded: a. DNA/RNA polymerase b. Endoplastmic reticulum c. Ribosomes d. Mitochondriaarrow_forwardSome viruses poke holes in the nuclear envelope to enter the nucleus and attach to a chromosome. They would pass through in order: a. the nuclear lamina and then two membranes b. the nuclear lamina and then a membrane c. a membrane, the nuclear lamina, and then another membrane d. a membrane and then the nuclear lamina e. two membranes and then the nuclear laminaarrow_forward
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