Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 21, Problem 21RQ
Which statement is true of viroids?
- They are single-stranded RNA particles
- They reproduce only outside of the cell
- They produce proteins
- They affect both plants and animals.
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#3
Prions are
tiny circular molecules of RNA that can infect plants
mobile segments of DNA
viral DNA that attaches itself to the host genome and causes disease
misfolded versions of normal proteins that can cause disease
The genetic material of viruses can come in which
form?
O Double stranded DNA
Single stranded DNA
Single stranded RNA
Double stranded RNA
All of the above
Chapter 21 Solutions
Biology 2e
Ch. 21 - Figure 21.5 Which of the following statements...Ch. 21 - Figure 21.8 Influenza virus is packaged in a viral...Ch. 21 - Figure 21.10 Which of the following statements is...Ch. 21 - Which statement is true? A virion contains DNA and...Ch. 21 - The viral______play(s) a role in attaching a...Ch. 21 - Viruses. all have a round shape cannot have a long...Ch. 21 - The observation that the bacteria genus Chlamydia...Ch. 21 - A scientist discovers a new virus with a linear,...Ch. 21 - Which statement is not true of viral replication?...Ch. 21 - Which statement is true of viral replication? In...
Ch. 21 - Which statement is true of reverse transcriptase?...Ch. 21 - Oncogenic virus cores can be. RNA DNA neither RNA...Ch. 21 - Which is true of DNA viruses? They use the host...Ch. 21 - A bacteriophage can infect the lungs viruses...Ch. 21 - People with the CCR5?32 mutation of a T-cell...Ch. 21 - An apple grower notices that several of his apple...Ch. 21 - Which of the following is NOT used to treat active...Ch. 21 - Vaccines. are similar to viroids are only needed...Ch. 21 - A patient presents at the clinic with an acute...Ch. 21 - Which of the following is not associated with...Ch. 21 - Which statement is true of viroids? They are...Ch. 21 - The first electron micrograph of a virus (tobacco...Ch. 21 - Varicella-zoster virus is a double-stranded DNA...Ch. 21 - Classify the Rabies virus (a rhabdovirus family...Ch. 21 - Why can’t dogs catch the measles?Ch. 21 - One of the first and most important targets for...Ch. 21 - In this section, you were introduced to different...Ch. 21 - Although plant viruses cannot infect humans, what...Ch. 21 - A bacteriophage with a lytic life cycle develops a...Ch. 21 - Why is immunization after being bitten by a rabid...Ch. 21 - The vaccine Gardasil that targets human papilloma...Ch. 21 - Prions are responsible for variant Creutzfeldt...Ch. 21 - How are viroids like viruses?Ch. 21 - A botanist notices that a tomato plant looks...
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- Arrange the following list into the correct sequence for part of the cycle of a retrovirus: 1. dsDNA integrated into host DNA 2.viral proteins synthesized on host ribosomes 3. viral DNA uses host enzymes to transcribe viral RNA 4. reverse transcriptase catalyzes synthesis of ssDNA 5. synthesis of second DNA strand (a) 5, 2, 1, 3, 4 (b) 5, 2, 3, 4, 1 (c) 4, 5, 1, 3, 2 (d) 4, 1, 2, 3, 5 (e) 2, 1, 3, 4, 5arrow_forwardWhich 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_forwardViruses are not typically considered living organisms because they contain no biological molecules like lipids and proteins they can not replicate or reproduce on their own they do have any genetic material (DNA or RNA)arrow_forward
- For an RNA virus, what is the most important consideration? how to produce its genetic material as mRNA how to make a DNA intermediate for replication how to produce an RNA strand from DNA how to translate its proteinsarrow_forwardViruses can carry out which of the processes described below? They can use the host cell to copy themselves and make viral proteins. They can use the host cell to copy themselves and then synthesize their own proteins inside the viral capsid. They can manufacture their own ATP, proteins, and nucleic acids. They can metabolize food and produce their own ATP.arrow_forwardWhat is the function of reverse transcriptase in retroviruses? converts host cell RNA into viral DNA translates viral RNA into proteins uses viral RNA as a template for DNA synthesis destroy the host cell's DNA uses viral RNA as a template for making complementary RNA strandsarrow_forward
- Integrase Viruses are nonliving agents and reproduce independently from the host cells, * True False Coenocytic hyphae are septated. so each cell contains one or two nuclei *arrow_forwardWhy does Ebola look like a wormarrow_forwardVIRUS why do they steal cell membranes why are they not considered alivearrow_forward
- Which of the following mushroom-derived molecules is known to block DNA transcription by directly interfering with the function of the eukaryotic RNA polymerase II? Question 33 options: taxol colchicine actinomycin D α-amanitin Aflatoxinarrow_forwardWhich of the following is NOT correct about Plasmodium? * O it causes lysis for red blood cells and malaria the most period of diploid stage occurs in the digestive tract of the mosquito. O it requires two hosts to complete its life cycle, human and female anopheles. their diploid sporozoites divide inside liver cells to produce merozoites it is an intracellular parasite Grom-poritive bacteria it looks like underarrow_forwardWhat is true about the difference between prions and viruses? Viruses have genomes composed of RNA, whereas prions have genomes composed of DNA. Viruses have capsids composed of protein, whereas prions are made only of nucleic acid. Viruses infect many types of cells, whereas prions infect only prokaryotic cells. Viruses generally cause disease symptoms quickly, whereas prions generally take many years to cause disease symptoms.arrow_forward
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