Chapter 006. Talaros Foundations in Microbiology Quiz Test Bank Q & A 2023

Chapter 006.Talaros Foundations in Microbiology Quiz Test Bank Q & A 2023 Capsids is a ____. Each capsid is made of identical protein subunits called____ correct answers Protein coat that encloses and protects the nucleic acid (All viruses have these) Capsomere Nucleocapsid consists of _____together with_____ correct answers 1.) capsid 2.) nucleic acid Some viruses have an external covering called an____ or ones that lack are _____ correct answers Envelope Naked In (1884) Louis Pasteur postulated that rabies was caused by a______ In the (1890s) Ivanovski and Beijerinck showed a disease in tobacco was caused by a______ (Same answer) correct answers Virus Viruses are____ correct answers Noncellular particles with a definite size, shape, and chemical composition and are obligated intracellular parasites Viruses are considered the most_____microbes on earth; Viruses played a role in the evolution of____,_____,and____ correct answers Abundant Bacteria, Archaea, and Eukarya Viruses contain what? correct answers Contain only the parts needed to invade and control a host cell Most viruses size range are____ What type of microscope? correct answers < 0.2 um. Electron Microscope Two major parts of a virus are the______, and______ correct answers 1)Covering 2)Central core Viruses need_____for survival correct answers A Host Viruses bare no resemblence to cells becaue they_____ correct answers Lack protein-synthesizing machinery Name the two general structures of a virus correct answers 1)Helical 2)Icosahedral Helical is a_____ correct answers Continuous helix of capsomers forming a cylindrical nucleocapsid Icosahedral is a shape that is_____with______ correct answers 1) 20-sided with 2) 12 corners Viral envelope are: 1)Mostly____viruses 2)Acquired when the virus leaves the_____ 3)Exposed proteins on the outside of the envelope, called spikes, that are essential for______ correct answers 1) Animal 2) Host cell 3) Attachment of the virus to the host cell The Capsid/Envelope Protects the_____when the virus is outside of the host cell correct answers Nucleic acid The Capsid/Envelope Helps the virus bind to a____and assists the penetration of the_____into a suitable host cell correct answers 1) Cell surface 2) Viral DNA or RNA Bacteriophage is a____ correct answers Virus that specifically parasitizes bacteria Some Bacteriophages have a______ along with a_____and_____ correct answers 1) Polyhedral nucleocapsid 2) Helical tail 3) Attachment fibers List the Types of Viruses strucures correct answers 1) Complex Viruses 2) Enveloped Virus 3) None Enveloped Virus Viral genome is either_____or_____but never both correct answers DNA or RNA Nucleic Acids carrie genes necessary to invade_____and redirect________to make new viruses correct answers 1)host cell 2)cell's activity Nucleic Acids number of genes varies for each type of virus, few to hundreds (T/F) correct answers True DNA viruses shapes are_____or_____ correct answers 1)Circular 2) Linear