Campbell Biology
12th Edition
ISBN: 9780135188743
Author: Urry
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 19, Problem 8TYU
SCIENTIFIC INQUIRY When bacteria infect an animal, the number of bacteria In the body increases in an exponential fashion (graph A). After infection by a virulent animal virus with a Iytic replicative cycle, there is no evidence of infection for a while. Then the number of viruses rises suddenly and subsequently increases in a series of steps ($raph B). Explain the difference in the curves.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Assume you isolate a single stranded (+) RNA virus. When you examine the proteins in the virus, you find that it does NOT contain replicase enzymes within its capsid. Which of the following is true?
This virus must have a gene that encodes replicase.
This virus will not be able to enter a host cell.
Its genome cannot be translated (the process of translation) by the host cell ribosomes.
A DNA copy of the viral genome has to be made before viral genes are expressed.
This virus must lack surface antigens.
You are studying a new retrovirus. The viral protein (X) appears to play a role in the export of the viral genomes to the
cytoplasm. Protein X brings viral DNA to the cytoplasm and returns back to the nucleus after genome export is complete.
Researchers have developed a new drug for the virus. Following treatment with the new drug, the viral protein stays in the
nucleus and cannot export the viral genomes. What is the most plausible and logical function of the drug? Use your
knowledge of nuclear transport to answer this question.
O A. The drug inhibits the binding of the viral protein and the viral genomes to the import receptor.
B. The drug inhibits the binding of Ran-GTP to the nuclear export receptor in nucleus.
C. The drug promotes the Ran GAP activity.
D. The drug blocks the NLS on the viral protein.
You have discovered a new disease-causing virus. It has a negative sense RNA genome. Infected
individuals often have few-to-no symptoms, but are continuously infectious to other individuals for
months after initial infection. Which of the following is likely true about this virus? (Select all that
apply)
Its genome must first circularize before being translated into proteins
It carries a replicase protein into a host cell upon infection.
The symptoms of this virus exemplify a latent infection.
The virus has infected every cell within an infected individual.
The virus must first synthesize the complementary strand RNA before expressing new proteins.
The symptoms of this virus exemplify a chronic infection.
Chapter 19 Solutions
Campbell Biology
Ch. 19.1 - Prob. 1CCCh. 19.1 - Prob. 2CCCh. 19.2 - Compare the effect on the host cell of a lytic...Ch. 19.2 - MAKE CONNECTIONS Compare the CRISPR-Cas system to...Ch. 19.2 - Prob. 3CCCh. 19.2 - Why is HIV called a retrovirus?Ch. 19.2 - Prob. 5CCCh. 19.3 - Describe two ways in which a preexisting virus can...Ch. 19.3 - Contrast horizontal and vertical transmission of...Ch. 19.3 - WHAT IF? TMV has been isolated from virtually all...
Ch. 19 - Are viruses generally considered living or...Ch. 19 - Prob. 19.2CRCh. 19 - Prob. 19.3CRCh. 19 - Which of the following characteristics,...Ch. 19 - Emerging viruses arise by (A) mutation of existing...Ch. 19 - Prob. 3TYUCh. 19 - Prob. 4TYUCh. 19 - Prob. 5TYUCh. 19 - DRAW IT Redraw Figure 19.8 to show the replicative...Ch. 19 - EVOLUTION CONNECTION The successof some viruses...Ch. 19 - SCIENTIFIC INQUIRY When bacteria infect an animal,...Ch. 19 - WRITE ABOUT A THEME: ORGANIZATION While viruses...Ch. 19 - Prob. 10TYU
Additional Science Textbook Solutions
Find more solutions based on key concepts
How does the removal of hydrogen atoms from nutrient molecules result in a loss of energy from the nutrient mol...
Seeley's Anatomy & Physiology
Some people compare DNA to a blueprint stored in the office of a construction company. Explain how this analogy...
Biology: Concepts and Investigations
Identify each of the following reproductive barriers as prezygotic or postzygotic. a. One lilac species lives o...
Campbell Essential Biology with Physiology (6th Edition)
2. Why is it that the range of resting blood pressures of humans is best represented by a bell-shaped curve co...
Human Biology: Concepts and Current Issues (8th Edition)
Match the people in column A to their contribution toward the advancement of microbiology, in column B. Column ...
Microbiology: An Introduction
2. A gene is a segment of DNA that has the information to produce a functional product. The functional product ...
Genetics: Analysis and Principles
Knowledge Booster
Learn more about
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
- Suppose that a time machine allows you to go back in time (and to travel to Australia), and you have collected rabbits and Myxoma from the years 1955 and 1980. Once you are back in the twenty-first century, you infect both sets of rabbits with both sets of Myxoma viruses. The most likely result will be (1) that the rabbits from 1955 injected with the 1955 virus will have a survival rate than those same rabbits injected with the 1980 virus; and (2) that the rabbits from 1955 injected with the 1980 virus will have a survival rate than rabbits from 1980 injected with the 1980 virus.. A. lower; lower B. lower; higher C. higher; lower O D. higher; higher E. the survival rates will be the same in experiments (1) and (2)arrow_forwardThe 1918 influenza strain killed millions of people world-wide. After recovering the virus from preserved lung tissue and sequencing the genome, which of the scientific findings did NOT account for the viruses lethality in humans? The hemagglutination protein was associated with high lung damage. The virus came directly from birds, without first circulating in pigs. The virus was independent from a cellular protease for cell entry, and utilized neuraminidase instead. The virus came from bats.arrow_forwardFigure 17.6 Influenza virus is packaged in a viral envelope, which fuses with the plasma membrane. This way, the virus can exit the host cell without killing it. What advantage does the virus gain by keeping the host cell alive?arrow_forward
- "As the coronavirus spread globally, its genome changed — mutated — as expected for any virus. These mutations may affect the virus’s “fitness,” its ability to reproduce and spread. Some mutations weaken a virus, some have no measurable effect, and some make it stronger. There are many ways that a virus can mutate to increase its fitness. While there’s been much focus on changes in the virus’s spike proteins, which allow the coronavirus to invade cells, a virus can also sustain changes in other proteins. Such changes can allow the virus to replicate more easily or evade the immune system, for example. They may even allow the virus to persist longer in nasal passages. As a virus becomes more fit, it will outcompete less fit viruses — and Delta is not the first variant that has beat its predecessors and competitors in certain areas. There’s the Alpha variant that first became dominant in Britain, and the Gamma variant that first became dominant in Brazil. Such changes are not unique to…arrow_forwardmicrobiology question Which of the following statements is true regarding bacteriophages and eukaryotic viruses? A. Both may enter a host cell by endocytosis. B. Both involve entry of the entire virus particle into the host cell. C. Both can have segmented genetic material. D. Bacteriophages leave the capsid outside of the cell that they infect, while eukaryotic virus infections involve the entry of the capsid with the nucleic acid.arrow_forwardThe Ebola virus is an enveloped, helical ssRNA virus that replicates quickly. Given this information, which one of the following is a reason why Ebola infection is difficult to fight (both by our bodies and by treatments)? Question 6 options: Because it has many genes and thus replication is slow. Because it doesn't have a membrane. Because viral RNA polymerases make a lot of mistakes. Because it can integrate into the host cell DNA.arrow_forward
- Viruses replicate by entering a cell and using the host cell's enzymes to produce more copies of itself. SARS-COV2 is a spherical virus that has been observed to be as small as 50 nm in diameter. If we approximate a human epithelial cell to be a cylinder with a 58 um height and 5 um diameter, what is the maximum number of SARS-COV2 viruses that could fit inside the cell?arrow_forwardHow might a bacteriophage be used to treat a bacterial infection? – this question relates to question # 2. Address specificity. Why can viruses only infect specific cells? Why would the host cell be safe from infection?arrow_forwardThe Ebola virus is an enveloped, helical ssRNA virus that replicates quickly. Given this information, which one of the following is a reason why Ebola infection is difficult to fight (both by our bodies and by treatments)? Question 6 options: Because it has many genes and thus replication is slow. Because it doesn't have a membrane. Because viral RNA polymerases make a lot of mistakes. Because it can integrate into the host cell DNA. Previous PageNext Pagearrow_forward
- The Archaea is similar to the Eukarya in the following characteristic except? initiator 1RNA (protein synthesis) O 16S FRNA nucleotide sequence sensitivity to antibiotics types of RNA polymerase The Archaea differ from the Eubacteria in the following characteristic except: * O initiator tRNA (protein synthesis) origin of DNA replication sensitivity to antibiotics types of RNA polymerasearrow_forwardAccording to Philip Bell’s viral eukaryogenesis hypothesis, genes for the glycolytic pathway, theKrebs cycle, electron transport, and oxidative phosphorylation were all provided by:A. an endosymbiotic gram-negative eubacteriumB. an endosymbiotic archaeobacteriumC. a gram-positive eubacterial host cellD. a double-stranded DNA virusE. an archaeobacterial host cellarrow_forwardBiology A gene that is essential to the existence of a bacterium (e.g., the 16S rRNA gene) would most likely be classified as part of the __________ genome. Group of answer choices 1) Core 2) Accessory 3) Reduced 4) Transferred 5) Mutated.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Biology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage Learning
Biology (MindTap Course List)
Biology
ISBN:9781337392938
Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher:Cengage Learning
Epidemiological Studies - made easy!; Author: Let's Learn Public Health;https://www.youtube.com/watch?v=Jd3gFT0-C4s;License: Standard Youtube License