Microbiology test 1

Microorganisms exist in all Biological Domains

Viruses are aggressive parasitic cells that attack other cells.

Life on Earth would be impossible without microbes.

There are more Eukaryotic cells in the human body than Prokaryote cells.

Some organisms studied by microbiologists are larger than a pizza.

Prions are cellular entities.

The peptidoglycan layer of gram-negative bacteria is thinner than that of gram-positive bacteria.

The rotation of bacterial flagella is powered by ATP hydrolysis.

Optical density of a bacterial suspension is directly proportionate to cell population density.

An example of "decimating" a microbial population is to reduce it from 1000 to 100 microbes.

During logarithmic growth, bacteria divide synchronously by binary fission, thereby doubling their population in a discrete stepwise manner

Microbiologists study a variety of organisms, but all are considered either Bacteria or Archaea.

Marshall and Warren won a Nobel Prize for their application of Koch's Postulates to establish Helicobacter pylori as the etiological agent of gastric and pyloric ulcers

Quarternary ammonium compounds are a class of disinfectants that are cationic surfactants

Microorganisms are the only cellular-based organisms capable of spontaneous generation.

The periplasmic space is ONLY in gram-positive cell walls.