WGU C453 micro (PA)
Which class of microbes are unicellular organisms that typically lack organelles? – ✔✔Bacteria
It is determined that a bacterial sample grows robustly in low, moderate, and high concentrations
of salt.
What is most likely true about this organism? – ✔✔It is halotolerant.
What is the additional molecule contained in the cell walls of Gram-positive organisms that plays
a role in the attachment of bacteriophages? – ✔✔Teichoic acid
In which type of bacteria is the periplasmic space between the cell membranes most easily
observable? – ✔✔Gram-negative
Which bacterial toxins can cause fever, inflammation, and even shock when they are released
from Gram-negative bacteria? – ✔✔Endotoxins
What connects bacterial cells during the exchange of genetic material? – ✔✔Pilus
Which component helps bacterial cells attach to host blood cells and causes clumping? –
✔✔Pilus
Which fungal structure can form long, extended filaments, and can regrow from fragments that
have broken off allowing some fungi to survive and spread disease rapidly within a single host? –
✔✔Hypha
What is produced by bacteria such as Helicobacter pylori to survive the extremely low pH
environment of the human stomach? – ✔✔Urease
Which term describes the movement of bacterial cells towards a substance, such as an important
nutrient? – ✔✔Positive chemotaxis
Which virus subgroup requires the enzyme reverse transcriptase for replication of its nucleic
acid? – ✔✔Single-stranded RNA virus
Which type of virus contains only the nucleocapsid? – ✔✔Naked
Which phylum of fungi produces a saclike structure that releases spores during sexual
reproduction? – ✔✔Ascomycota
Which phylum of fungi includes the edible mushrooms humans eat, as well as toadstools, rusts,
and smuts? – ✔✔Basidiomycota