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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An antiprotozoal drug that functioned by interfering with ribosome function in eukaryotes would
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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 proteins
What 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 strands
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 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_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_forwardMisfolded prions are infectious because they: cause other proteins to denature cause other genes to misfold cause other prion proteins to misfold cause many other proteins to misfold cause ribosomes to fall off of transcripts cause other proteins to dissolvearrow_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_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 are true about bacteriophages (phages)? Select all correct answers. A phage is Nature's version of a broad-spectrum antibiotic Phages are virus that destroy bacteria Phages are a possible alternative to antibiotics Phages continue to replicate until the target bacteria is eliminated. Phages kill bacteria by destroying the bacterial RNA as it is produced.arrow_forwardWhich of the following is a bacterial genetic recombination mechanism that happens with the aid of bacteriophages. * O meiosis conjugation transduction binary fission O transformation tomperate phages*arrow_forward
- Binary fission is used in which of the following DNA transfers? Horizontal Gene Transfer Vertical Gene Transfer Crossing Over Conjugationarrow_forwardHow do retrovirus assemble new viral progeny? a. Viral RNA is copied into DNA, then integated into the host genome and transcribed ans translated b.Viral DNA is copied into RNA, then integated into the host genome and transcribed and translated c. Retroviruses use the same machinery as prokaryotes and follow the same process to make RNA d. Retroviruses have an RNA genome instead of DNA but use all of the same enzymes as eukaryotesarrow_forwardIn some viruses the flow of information is in reverse that is ,from RNA to DNA.can you suggest a simple name to the process?arrow_forward
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