Why do RNA viruses seem to have higher rates of mutation? Selected Answer: RNA nucleotides are less stable than DNA nucleotides. Answers: RNA viruses can incorporated a wide variety of non-standard nucleotides. Viruses are more sensitive to mutagens. Replication of their genomes does not involve proofreading. RNA nucleotides are less stable than DNA nucleotides.

Why do RNA viruses seem to have higher rates of mutation? Selected Answer: RNA nucleotides are less stable than DNA nucleotides. Answers: RNA viruses can incorporated a wide variety of non-standard nucleotides. Viruses are more sensitive to mutagens. Replication of their genomes does not involve proofreading. RNA nucleotides are less stable than DNA nucleotides.

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Similar questions

The image below shows the replication bubble of a piece of DNA in the process of replication. However, the image only shows the DNA strands being replicated. Fill in the rest of the elements of the figure, specifically: primers, Okazaki fragments, newly replicated leading strand DNA, as well as the enzymes helicase, primase, DNA polymerase III, DNA polymerase I and ligase. Also be sure to indicate the 5’ and 3’ ends of all nucleic acid polymers.
Mutations can be caused by which process? faulty DNA repair nondisjunction base sequence deletion All of the above
AZT (3'-azido-2',3'-dideoxythymidine) is a drug for HIV infection that gets incorporated into growing viral DNA and blocks the activity of: reverse transcriptase Integrase DNA ligase DNA polymerase β (beta).
Which of the following mutagens results in the deamination of nitrogenous bases? nitrous acid base analogue aflatoxin intercalating agent
Which of the following functions are associated with the E. coli RNA polymerase? Select all that apply Helicase activity Topoisomerase activity 3' to 5' polymerase activity 5' to 3' polymerase activity
Why is E. coli not the best species to use in the lab for DNA cloning and manipulation experiments? (even though we have used this bacteria the most for this purpose!) It grows slowly It has too many chromosomes and plasmids It is not naturally transformable It grows at a very high temperature at which DNA is not stable How are the two strands of double stranded DNA held together Covalent bonds between phosphate groups Hydrogen bonding between bases van der Waal interactions Duct tape Which of the following is true about double stranded DNA One strand has two 5' ends and the other has two 3' ends The strands are identical and completely symmetric Each strand has a 5' end and a 3' end Double stranded DNA contains NO phosphate groups True or False. The PCR test for the coronavirus includes and extra step to convert RNA to DNA. True False
This is a multiple answers question. Which statement is true about CRISPR-Cas system? CRISPRS stand for clustered regularly interspaced short palindromic repeats Both bacteria and archaea can protect themselves from viral infection by using this system. Cas protein and short RNA form a complex The CRISPR region of DNA contains DNAS from previous infection by phages. Cas protein cuts target foreign DNA in pieces. The short RNA in the Cas protein and RNA complex has no function.
What is the purpose of reverse transcriptase in retroviruses? It translates viral RNA into proteins. It converts host cell RNA into viral DNA. It uses viral RNA as a template for DNA synthesis. It uses viral RNA as a template for making more viral RNA strands.
A one base-pair change in a genetic sequence is called a mutation. revertible frameshift insertion complementation
A bacteriophage has inserted its DNA into a bacterial host and replicated as a part of the host’s genome for several generations as the host reproduces. For this virus to assemble more infectious viral particles, what must it do? Switch to the lysogenic cycle of replication Switch to the vicious cycle of replication Purposefully mutate its own genes Switch to the lytic cycle of replication
Viruses display many of the characteristics of living organisms. In particular, they reproduce, creating new virus particles. During reproduction, viruses make copies of their genetic material, and some of the copies contain mutations that are beneﬁcial to the virus. For example, HIV (human immunodeﬁciency virus), the virus that causes the disease AIDS (acquired immunodeﬁciency syndrome) mutates so often that its surface proteins change faster than we can develop antiviral drugs. New drug-resistant strains of HIV are appearing constantly. However, viruses can reproduce only after entering a living cell of an organism, because viruses hijack the cell’s machinery and use it to produce new viruses. Where does that combination of characteristics place viruses on the scale of nonlife to life? Are viruses living organisms? Nonliving? If neither of those categories ﬁts the properties of viruses, how should they be classiﬁed?