Module 4 MCQ Flashcards
What structure(s) would contain a complete chromosome of a bacterium?
Nucleoid and Endospore
What is the most important structure in bacteria for classifying them as either gram-negative or gram-positive?
Cell Wall
The largest number of viable cells in a bacterial culture is found during the growth phase known as:
Stationary Phase
A bacterium undergoes binary fission three times and none die. How many bacteria are there altogether?
8
Characteristic of photoheterotrophic metabolism is:
a dependence on organic carbon for building blocks.
What is NOT a photoautotrophs?
Fungi
Which part of our gastrointestinal tract contains the highest concentration of microorganisms?
Colon
The human microbiome is:
phylum poor but species rich.
what is not a component of bacteriophage?
Lipid envelope
What are viruses?
Acellular microorganisms.
what is NOT a microbial virulence factor?
Plasmid
Exotoxins are
toxic proteins secreted by a pathogen that can produce specific symptoms.
Koch’s Postulates are BEST described by
A set of guidelines used to demonstrate that a specific pathogen causes specific disease symptoms.
What is one of the LEAST selective bacterial target site for the development of antimicrobials?
Cell membrane.
Beta-lactamase is an enzyme produced by some bacteria which:
inactivates penicillin molecules.
Transduction is:
gene transfer between bacteria mediated by a virus.
The horizontal transfer of drug resistant genes from one bacterium to another can be
aided by what structure?
Pilus
Infections that spread globally are called:
Pandemic
What are required for natural selection to occur?
selection, inheritance, variation, time
What is a key components of the HIV lifecycle leads to a high rate of
mutation in its genome?
Reverse transcription.
