Foundations in Microbiology Chapter 6 Test Questions and Correct Answers Already Passed
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Foundations in Microbiology Chapter 6
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Foundations In Microbiology Chapter 6
Foundations in Microbiology Chapter 6 Test Questions and Correct Answers Already Passed
Viruses - Answers -Obligatory intracellular parasites
-contain DNA or RNA
-contains protein coat
-some enclosed by envelope
-some have spikes
Host range - Answers ____ ____ is determined by specific host ...
Host range - Answers ____ ____ is determined by specific host attachment sites and cellular factors.
most abundant - Answers Viruses are ___ ___ microbes on earth with NO universal agreement on how
and when viruses originate
Capsid
Envelope (not in all) - Answers The covering of viruses contain?
Nucleic acid molecule (RNA or DNA)
Matrix proteins (not found in all) - Answers Central core of viruses contain?
Capsids - Answers All viruses have ____
Capsids - Answers -protein coats that enclose and protect their nucleic acid
Nucleic acid - Answers RNA or DNA
nucleocapsid - Answers The capsids together with the nucleic acid is called
envelope; naked - Answers Some viruses have an external covering called an ____, those lacking an
envelope are _____.
capsomers - Answers Each capsid is made of identical protein subunits called
Viral envelope - Answers -mostly animal viruses
-acquired when the virus leave the host cell
Spikes - Answers The viral envelope exposes proteins on the outside of the envelope called ____-
essential for attachment of the virus to host cell.
Capsid/envelope - Answers _______ protects the nucleic acid when the virus is outside of the host cell-
also helps virus bind to cell surface, penetration of DNA or RNA in host cell
Two structure capsid types - Answers -Helical
, -Icosahedral
Helical - Answers -continuous helix of capsomers forming a cylindrical nucleocapsid
Icosahedral - Answers -20-sided with 12 corners
Complex viruses - Answers -Atypical viruses
bacteriophages - Answers Some ____ have a polyhedral (isosahedral) nucleocapsid along with a helical
tail and attachment fibers
Types of Viruses - Answers a. Complex viruses
b. Enveloped viruses
-Helical
-icosahedral
c. NonEnveloped viruses
-Helical
-icosahedral
Complex viruses - Answers -poxvirus, large DNA virus
Viral genome - Answers -either DNA or RNA but not both
DNA viruses - Answers -usually double stranded (ds) but may be single stranded (ss)
-Parvoviridae
-circular or linear
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