PRESCOTT'S MICROBIOLOGY
11th Edition
ISBN: 2818440045677
Author: WILLEY
Publisher: MCG
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Chapter 26.2, Problem 2MI
Why do you think T4 evolved to initiate
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What is the function of reverse transcriptase in retroviruses?
a) It converts viral RNA into double-stranded DNA
Ob) It uses viral RNA as a template for making complementary RNA strands
Oc) It translates viral RNA into proteins
d) It uses viral DNA as a template for RNA synthesis
A cell is produced with a mutation that causes it produce a completely defective TFIIH. What does this likely mean for the fate of the cell?
A) The cell's copied DNA may contain more errors.
B) the cell cannot make RNA
C) Producing RNAs will be slower because the polymerase will fall off the DNA more often.
D) The cell cannot replicate its DNA
What is the term used to describe the genome of a bacterial cell that has been
infected by a phage utilizing lysogeny?
O 1) nucleocapsid
O 2) prophpage
O 3) provirus
O 4) lysogenome
O 5) chromatid
Chapter 26 Solutions
PRESCOTT'S MICROBIOLOGY
Ch. 26.1 - List some characteristics used in classifying...Ch. 26.1 - Prob. 2CCCh. 26.2 - Prob. 1MICh. 26.2 - Why do you think T4 evolved to initiate DNA...Ch. 26.2 - What function does HMC glycosylation serve?Ch. 26.2 - Explain why the T4 genome is circularly permuted.Ch. 26.2 - Prob. 1.2CCCh. 26.2 - How is a prophage induced to become active again?Ch. 26.2 - Describe the roles of cII, CIII, repressor (CI),...Ch. 26.2 - How do the temperate phages Mu and P1 differ from...
Ch. 26.2 - How is the envelope of this virus formed? How does...Ch. 26.2 - Why do cold sores recur throughout the lifetime of...Ch. 26.2 - In what part of the host cell does a herpesvirus...Ch. 26.2 - Many small DNA viruses rely on host enzymes for...Ch. 26.3 - Why is the X174 genome considered plus stranded?Ch. 26.3 - Why is it necessary for some ssDNA viruses to...Ch. 26.3 - Prob. 2CCCh. 26.3 - How do parvoviruses trick the host DNA polymerase...Ch. 26.4 - The rotavirus genome encodes 12 proteins. Suggest...Ch. 26.4 - Describe the life cycle of 6 phage. What makes...Ch. 26.4 - Prob. 3CCCh. 26.4 - In what ways are the life cycles of 6 and...Ch. 26.5 - Where in the host does the plus-strand RNA genome...Ch. 26.5 - How do some plus-strand viruses use polyproteins...Ch. 26.5 - What is an IRES? Why is it important?Ch. 26.5 - Prob. 3CCCh. 26.6 - How does that use of a segmented genome by...Ch. 26.6 - Prob. 2CCCh. 26.7 - Prob. 1MICh. 26.7 - Prob. 1CCCh. 26.7 - Prob. 2CCCh. 26.7 - Prob. 3CCCh. 26.8 - Prob. 1CCCh. 26.8 - Trace the HBV multiplication cycle, paying...Ch. 26 - Prob. 1RCCh. 26 - Prob. 2RCCh. 26 - Prob. 3RCCh. 26 - Prob. 4RCCh. 26 - No temperate RNA phages have yet been discovered....Ch. 26 - The choice between lysogeny and lysis is...Ch. 26 - Prob. 3ALCh. 26 - You are studying RNA viruses and have discovered a...Ch. 26 - Prob. 5ALCh. 26 - Prob. 6AL
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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
- Draw a generic (+)RNA virus replication cycle. For viruses, (+) RNA indicates the genomic RNA can be translated directly. How would this differ from the system you drew in #1? Draw a generic (+) RNA virus replication cycle. Indicate which proteins need to be present for RNA replication and translation. Where would they act? Indicate what sequences or modifications would need to be present on the virus RNA for RNA replication and translation. How might a virus differentiate between RNA to be put into progeny virus particles and RNA to be translated into protein?arrow_forwardThe second step in viral replication is entry. For bacteriophage, entry usually involves: O a) direct entry of the nucleic acid into the cell. Ob) phagocytosis. c) membrane fusion mechanism of entry. d) receptor-mediated endocytosis.arrow_forwardDuring the lytic replication cycle of the bacteriophage T4, the phage _________ remains outside the cell while the phage ________ enters the cell. A) capsid protein… tail fibers B) DNA… protein C) envelope… DNA D) enzymes… ribosome E) protein… genetic material F) RNA… capsid proteinarrow_forward
- 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.arrow_forwardWhich process listed below allows genetic material to be transferred from a virus-like particle that lacks genes for its own replication? A) Conjugation of an F+ plasmid B) Gene transfer through a gene transfer agent C) Transduction by a dsDNA phage Mu D) Transformation of a linear piece of DNAarrow_forwardWhat does a bacteriophage accomplish with lysogeny? O 1) it allows the bacteriophage to destroy the host cell's DNA. 2) it enables the bacteriophage to take over the cell. O 3) it speeds up the viral infection cycle. 4) it allows the bacteriophage to infect cells it would not normally infect. O 5) the genetic material of the bacteriophage can be passed on to future generations of infected cells.arrow_forward
- Which statement is true of viral replication? A) virus attaches to a specific receptor site on the host-cell membrane. B) Once inside the cell, the viral capsid is degraded, and the viral nucleic acid is released. C) Virus uses the host cell’s machinery to replicate and new virus particles are released. D) All of the abovearrow_forwardWhich of the following statements is false about DNA replication? A) Each lagging strand of DNA is started by an RNA primer. B) DNA polymerase joins nucleotides in the 5' to 3' direction only. C) The leading strand of DNA is made continuously. D) More than one replication fork is present. E) A replication bubble opens in one direction only.arrow_forwardFigure 1 above shows that remdesivir “mimics” an important component of RNA replication. Which component of RNA replication has a structure similar to that of remdesivir?arrow_forward
- Double-stranded RNA viruses, use the following polymerase for genome synthesis: A) viral RNA-dependent RNA polymerase. B) host cell DNA-dependent RNA polymerase. C) viral DNA-dependent DNA polymerase. D) host cell RNA-dependent RNA polymerase.arrow_forwardOnce in human cells, which of the following statements might best describe how COVID19 replicates? a) Manipulates DNA Polymerase III to create a leading strand replication of the RNA b) Manipulates DNA Polymerase III to create a lagging strand replication of the RNA c) Manipulates Reverse Transcriptase to transcribe RNA sense strand into DNA antisense strand then back d) Manipulates RNA Polymerase II to transcribe RNA sense strand into RNA antisense strand then back e) Manipulates RNA Polymerase III to transcribe ribosomal RNAs for replicationarrow_forwardYou 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.arrow_forward
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