“2025 GCSU Microbiology Final (Bachoon): Complete Practice Questions & Detailed Answers”

GCSU MICROBIOLOGY FINAL (BACHOON) NEWEST 2025 COMPLETE
QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS)
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when are viruses considered to be alive? - CORRECT ANSWER-ONLY when they are inside the
host they infect



where do they multiply? - CORRECT ANSWER-inside living cells



are viruses sensitive to antibiotics? - CORRECT ANSWER-NO



what are viruses sensitive to? - CORRECT ANSWER-interferon



host range - CORRECT ANSWER-- the spectrum of host cells a virus can infect

- most can only infect one specific host because it requires a specific site to attach to its host

- those that infect bacteria are called "bacteriophage" or "phage"



what 3 things makes up a virus? - CORRECT ANSWER-1) nucleic acid

2) capsid

3) envelope (on some viruses)



1) nucleic acid - CORRECT ANSWER-- have DNA (or) RNA; not both

, - double stranded or single stranded

- linear or circular



genome size? - CORRECT ANSWER-ranges from a few thousand nucleotides to as many as
250,000



2) capsid - CORRECT ANSWER-- protein coat surrounding and protecting the nucleic acid



what is the capsid composed of? - CORRECT ANSWER-protein subunits called "capsomeres"



3) envelope - CORRECT ANSWER-- on some viruses, it covers the capsid.



- some envelopes may have "spikes" which are carbohydrate protein complexes that project
from the surface



definition of a virus - CORRECT ANSWER-a submicroscopic, parasitic, filterable agent consisting
of a nucleic acid surrounded by a protein coat



which is smaller, viruses or bacteria? - CORRECT ANSWER-bacteria



what can a virus infect? - CORRECT ANSWER--invertebrates

-vertebrates

-plants

-protists

-fungi

-bacteria