aapter 13. Evolution and Diversity among the Microbes 211 Testing and Applying Y
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Question
aapter 13. Evolution and Diversity among the Microbes 211 Testing and Applying Your Understanding Multiple Choice oor mere meliple cheiee v eer"? 1. Protists are alike in that they all are: a) multicellular. c) nonparasitic. d) marine. e) photosynthetic. 2. To what does the phrase horizontal gene transfer refer? a) the only method of genetic recombination in bacteria b) the mechanism one individual to another that is not c) transfer of genetic material information from the do recombination between individuals with linear (rather than circular) chromosomes e) All of the above. 3. The basic structure of virus consists of a protein coat, and polymerase to replicate of a a) genetic information in the form DNA its DNA b) genetic information in the form of DNA. within a protein coat, along c) genetic information in the form of DNA or RNA enclosed d) with a few enzymes. or RNA enclosed within a protein coat. in genetic information in the form of DNA transcriptase e) genetic information in the form of RNA, a protein coats and reverse order to turn its RNA to DNA. 4. How are viruses able to recognize a host cell and enter it? a) Viruses enter through the pores already present on a host cell. it. b) Viruses trick the into engulfing for some other c) Viruses attach to host cell surface molecules that were created function of the cell. envelopes that puncture the d) Viruses have spikes outside of their protein coats or through the hole. outside membrane of the host cell and the virus enters e) viruses adhere to proteins on the host cell's surface that were created specifically for viral entry. 5. All prokaryotes reproduce by: a budding out from host cells. b) sexual reproduction. c) endospore production. d) inary fission. reproduce. e) All of the above are possible ways that prokaryotes c 2009, 2013, 2015 WH Freeman & Co. Used by permission.
Explanation / Answer
1. Protist are alike in that they all are
B) Eukaryotic.
2. To what does the phrase : Horizontal gene transfer" refers-
C) The transfer of genetic material information from one individual to another that is not its offspring
3. The basic structure of a virus consists of
D) Genetic information in the form of DNA and RNA enclosed within a protein coat
4. How are viruses recognise a host cell and enters it
C) Virus attaches to host cell surface molecules that were created for some other function of the cells
5. All prokaryotes reproduced by
D) Binary fission
6. Viruses are odten used for gene therapy. which of the following properties makes viruses so useful in this type of experiments
D) Viruses are very adept at entering host cells and will inject any genetic materiainside their capsid into a host cell
7. How do plasmid containing genes for antibiotic resistance get exchanged between different bacteria cells in culture
A) Through conjugation
8. Which of the following is the correct step by step description of the most basic viral replication cycle
B) Virus binds receptors; virus enters host cell; nucleic acid released; host machinery is used to replicate viral nucleic acids and proteins; new viruses are assembled and leave host cells.
9. Which of the following statements about prokaryotes is INCORRECT?
A) Prokaryotes have circular pieces of DNA within their nuclei.
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