101 Micro 3003 Ray midterm exam I version A name March I, 2018 Chapter 1: Humans

Question

101 Micro 3003 Ray midterm exam I version A name March I, 2018 Chapter 1: Humans and the Microbial World 1. The scientific name of an organism includes its A. family and genus. B. first name and last name. C. genus and species. D. domain. E. genus and species AND domain 2. If you took a fluid sample from a shallow pond and passed it through a filter with a pore size of 12um, you would expect to find A, protozoans concentrated on the surface of the finer and prokaryotes, viruses and proteins in the filtrate B. protozoans and prokaryotes concentrated on the surface of the filter, and viruses and proteins in the filtrate C. protozoans, prokaryotes and viruses concentrated on the surface of the filter, and proteins in the filtrate. D. protozoans, prokaryotes, viruses and proteins in the filtrate 3. Which is not usually true of Archea? A. They are found as rods, spheres, or spirals. B. They reproduce by binary fission. C. They contain rigid cell walls. D. They are found as single cells. E. They contain peptidoglycan as part of their cell walls 4. Viroids A. are naked (lacking a protein shell) pieces of RNA B. are naked (lacking a protein shell) pieces of DNA. C. are known D. are composed of protein encasing DNA. E. are known to cause neurodegenerative diseases in animals AND are composed of protein encasing DNA. to cause neurodegenerative diseases in animals. the(This is also the part that is 5. The negatively charged component of the atom is the most involved in chemical reactivity.) A. proton. B. nucleus. C, neutron. D, electron Chapter 3 Microscopy and Cell Structure 6. The resolving power of a microscope is described as the ability of the microscope to A. separate clearly two objects that are very close together.D B. magnify an object.D C. separate the colors of an organism's internal structure. D. see structures at various depths in a tissue. 7. The macromolecule found in the cell walls of all bacteria is A. lipid A. B. teichoic acid. C. peptidoglycan.

Explanation / Answer

Ans-1 option (c) is correct i.e. genus and species.

Because scientific name is consist of genus name first and then species name.

Ans-2 option (b) is correct i.e. protozoan and prokaryotes concentrated on filter and viruses and protein in filterate.

Because their size is smaller than filter pore size.

Ans-3 option (e) is correct i.e. they contain peptidoglycan in their cell wall.

Because peptidoglycan is absent in archea cell wall.

Ans-4 option (a) is correct i.e. they are naked (without protein shell) pieces of RNA.

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