Biology: Science for Life with Physiology (6th Edition) (Belk, Border & Maier, The Biology: Science for Life Series, 5th Edition)
6th Edition
ISBN: 9780134555430
Author: Colleen Belk, Virginia Borden Maier
Publisher: PEARSON
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Chapter 14, Problem 9LTB
Summary Introduction
Introduction:
Viruses are the organic entities that connect with living organisms, but they're not alive themselves. Viruses are regarded as non-living because they cannot maintain homeostasis and are unable to grow or reproduce without other organism's assistance.
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Which one of the following is not true for virus, obligate intracellular parasites?
Viruses cannot generate energy outside of cells
Viruses cannot synthesize proteins outside of cells
Enveloped viruses require host cell membrane to obtain their envelopes
Viruses must degrade host cell DNA in order to obtain nucleotides
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.
Which of the following is a property of life that viruses lack?
The manufacture and use of complex carbon containing molecules
The potential to pass hereditary material to offspring
Engages in self-sustaining biological processes such as homeostasis and metabolism
The potential to grow and expand their populations
Chapter 14 Solutions
Biology: Science for Life with Physiology (6th Edition) (Belk, Border & Maier, The Biology: Science for Life Series, 5th Edition)
Ch. 14 - How many different species have been identified by...Ch. 14 - Add labels to the figure that follows, which...Ch. 14 - How are hypotheses about the evolutionary...Ch. 14 - Which of the following kingdoms or domains is a...Ch. 14 - Comparisons of ribosomal RNA among many different...Ch. 14 - On examining cells under a microscope, you notice...Ch. 14 - The mitochondria in a eukaryotic cell ___________....Ch. 14 - Prob. 8LTBCh. 14 - Prob. 9LTBCh. 14 - Phylogenies are created based on the principle...
Ch. 14 - Unless handled properly by living systems, oxygen...Ch. 14 - Imagine you have found an organism that has never...Ch. 14 - Support for the endosymbiotic theory for the...Ch. 14 - Research a species of plant, animal, fungi, or...Ch. 14 - Scientists initially rejected the endosymbiotic...Ch. 14 - The science that you learned in this chapter has...
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- Figure 17.5 Which of the following statements about virus structure is true? a. All viruses are encased in a viral membrane. b. The capsomere is made up of small protein subunits called capsids. c. DNA is the genetic material in all viruses. d. Glycoproteins help the virus attach to the host cell.arrow_forwardWhy are viruses NOT considered living organisms? They are not composed of cells They cannot reproduce on their own They have no nucleus all of the abovearrow_forwardWhich of the following is NOT a feature associated with viruses? a. Cytoplasm c. Protein coat b. Genetic information d. Envelopearrow_forward
- Which of the following statements about viruses is true?a) They contain DNAb) They contain RNAc) They contain proteind) They are susceptible to lipid solventsarrow_forwardWhich of the following is true? A. Viruses cannot reproduce outside a host cell. B. Prions are infectious proteins. C. Viroids lack a protein coat. D. Some viruses cause cancer. E. All of the above.arrow_forwardWhat is the difference between bacteria and viruses? Bacteria are non-living pieces of DNA or RNA; viruses are single-celled organisms Viruses are killed by antibiotics; bacteria are killed by probiotics Bacteria are harmful and are the cause of major human diseases; viruses are often helpful and can kill harmful bacteria Bacteria are single-celled organisms capable of survival and reproduction on their own; viruses cannot survive and replicate without a host cellarrow_forward
- Which of the following statements concerning viruses and human health is false? a-in many diseases caused by viruses, the virus attacks cells as it reproduces b- many viral diseases can be controlled through vaccinations c- some viruses can remain dormant in the body for years before disease symptoms appear d-most viral infections are difficult to treat, but they can be finally destroyed by antibioticsarrow_forwardSelect all the following statements that are TRUE regarding viruses: □ All viruses are potentially dangerous to humans because any virus can infect any host. □ Viruses are fastidious pathogens that require complex growth media. □ Viruses are noncellular particles that take over the metabolism of a cell to generate more virus particles. □ Viruses are genomes made of RNA and DNA that lack many protein. □ Viruses can infect all other known life forms on earth, from Archaea to humans.arrow_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_forward
- After a virus has entered its host, what factor usually determines the manner (or steps) in which the viral genome is copied and the viral enzymes are produced? the size of the virion the number of infecting virus particles the type of viral genome the type of viral capsidarrow_forwardAll viruses have which components in their infectious particles? Nucleic acids and protein coats Nucleic acids, protein coats, and membranes Nucleic acids, protein coats, and ribosomes Protein coats onlyarrow_forwardDiscuss the following statement: “Viruses exist in the twilight zone of life: outside cells they are simply dead assemblies of molecules; inside cells, however, they are alive.”arrow_forward
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