Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Textbook Question
Chapter 20, Problem 4MC
Viruses
- a. are usually photosynthetic.
- b. consist of a single cell.
- c. consist of DNA or RNA and a protein coat
- d. consist of ATP and a lipid coat.
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Check out a sample textbook solutionStudents have asked these similar questions
Which 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, D
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.
Viruses are not considered living because they ________. a. are not made of cells b. lack cell nuclei c. do not contain DNA or RNA d. cannot reproduce
Chapter 20 Solutions
Biology
Ch. 20.1 - describe some differences between bacteria and...Ch. 20.1 - describe the typical sizes and shapes of...Ch. 20.2 - What might explain the observation that most...Ch. 20.2 - Unwelcome Dinner Guests A few of the bacteria that...Ch. 20.2 - Some of the enzymes that have important uses in...Ch. 20.2 - Unpleasant breath odors are caused mainly by...Ch. 20.2 - As part of a study on the relationship between...Ch. 20.2 - What is the main advantage of prokaryotic fission,...Ch. 20.2 - describe the range of environments inhabited by...Ch. 20.2 - describe adaptations that help protect prokaryotes...
Ch. 20.2 - explain how prokaryotes reproduce and exchange...Ch. 20.3 - If all of Earths nitrogen-fixing prokaryotes were...Ch. 20.3 - Unwelcome Dinner Guests Many of the bacteria...Ch. 20.3 - explain how prokaryotes affect animal and plant...Ch. 20.3 - explain prokaryotes role in nutrient recycling?Ch. 20.3 - describe how prokaryotes help clean up pollution?Ch. 20.3 - describe some of the pathogenic bacteria that...Ch. 20.4 - Why are viruses unable to replicate outside of a...Ch. 20.4 - Biotechnologists often use viruses to transfer...Ch. 20.4 - describe the structure and characteristics of...Ch. 20.4 - describe the effects they can have on host...Ch. 20.4 - Prob. 3CYLCh. 20.4 - Unwelcome Dinner Guests How do harmful bacteria...Ch. 20 - The name of the process by which DNA is...Ch. 20 - A community of prokaryotes surrounded by slime and...Ch. 20 - Which of the following statements about archaea is...Ch. 20 - Viruses a. are usually photosynthetic. b. consist...Ch. 20 - Applying fertilizer near an oil spill to Increase...Ch. 20 - ____________, have peptidoglycan in...Ch. 20 - Prokaryotic cells are ____________,...Ch. 20 - Many prokaryotes use ____________ to move about....Ch. 20 - ____________,bacteria inhabit environments that...Ch. 20 - Prokaryotes reproduce by ____________ and may...Ch. 20 - The plant nutrient ammonium is produced by...Ch. 20 - Cholera, gonorrhea, and pneumonia are some of the...Ch. 20 - A virus consists of a molecule of __________ or...Ch. 20 - Describe some of the ways in which prokaryotes...Ch. 20 - What are nitrogen-fixing bacteria, and what role...Ch. 20 - Describe some of the extreme environments in which...Ch. 20 - What is an endospore? What is its function?Ch. 20 - What is conjugation? What role do plasmids play in...Ch. 20 - Why are prokaryotes especially useful in...Ch. 20 - Describe the structure of a typical virus. How do...Ch. 20 - Describe some examples of how prokaryotes are...Ch. 20 - How do archaea and bacteria differ? How do...Ch. 20 - Prob. 1ACCh. 20 - Before the discovery of prions, many (perhaps...
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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 best describes why antifungal treatments may have side effects to our own cells? A. Fungal cells and human cells both have cells walls made of cellulose B. Fungal cells and human cells both reproduce by budding C. Fungal cells and human cells both have flagella for movement D. Fungal cells and human cells both have a nucleus, 80s ribosome, and multiple shared organellesarrow_forwardMany viruses enter host cells through receptor-mediated endocytosis, What is an advantage of this entry strategy? A. The virus directly enters the cytoplasm of the cell B The virus only enters its target host cell type. C. The virus is protected from recognition by white blood cells. D. The virus can directly inject its genome into the cell's nucleus.arrow_forwardThe nucleic acid of animal viruses enters the host cell througha. injection b. fusion c. endocytosis d. b and carrow_forward
- You are treating a patient with antiviral agent against the nucleocapsid, what part of the virus will be destroyed? a. Enveloped b. Cytoplasm c. Capsid and genetic material d. Genetic materialarrow_forward________ can have a genome of either RNA or DNA. a. Bacteria b. Eukaryotes c. Viruses d. Archaeaarrow_forward_______ are oxygen-releasing photoautotrophs. a. Spirochetes c. Cyanobacteria b. Methanogens d. Bacteriophagesarrow_forward
- 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_forwardBoth archaea and eukaryotes have______ . a. peptidoglycan c. a nucleus b. histone proteins d. a capsidarrow_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
- Some 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_forwardViruses contain either DNA or RNA. Viruses possess their own metabolic system a. FIRST statement is TRUE; SECOND statement is FALSE b. BOTH Statements are TRUE c. FIRST statement is FALSE; SECOND statement is TRUE d. BOTH statements are FALSEarrow_forwardWhich 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
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