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Photo depicts Earth from space.
This NASA image is a composite of several satellite-based views of Earth. To make the whole-Earth image, NASA scientists combine observations of different parts of the planet. (credit: NASA/GSFC/NOAA/USGS)

Viewed from space, Earth offers no clues about the diversity of life forms that reside there. The first forms of life on Earth are thought to have been microorganisms that existed for billions of years in the ocean before plants and animals appeared. The mammals, birds, and flowers so familiar to us are all relatively recent, originating 130 to 200 million years ago. Humans have inhabited this planet for only the last 2.5 million years, and only in the last 200,000 years have humans started looking like we do today.

Quiz PDF eBook: 
Micro Final Practice 2 - Ken
Download Microbiology #2 Quiz PDF eBook
102 Pages
English US
Educational Materials

Sample Questions from the Micro Final Practice 2 - Ken Quiz

Question: In 1908 Orla-Jensen suggested that bacteria be grouped according to their





Gram stain.

Question: The relatedness of organisms determined by counting common characteristics is called


evolutionary taxonomy.

amino acid sequences.

DNA sequences.

numerical taxonomy.

suggests the organisms are very closely related at the species level AND means the GC content is 45%.

Question: APITM, EnterotubeTM and VitekTM are all


methods for extracting DNA from bacteria.

used to measure gas production.

commercially available methods used to identify bacteria.

used to show the presence of bacteria in a sample.

Question: Phage typing


is useful for determining eukaryotic cell types.

is used to extract DNA from cells.

is used to distinguish bacterial strains.

is dependent on the type of eukaryotic cell.

is used to distinguish bacterial strains AND is dependent on the type of eukaryotic cell.

Question: Organisms that grow very slowly, are non-culturable, are present in very small numbers or are mixed with a number of other bacteria may still be identified using


Southern blotting.

replica plating.


gas chromatography of fatty acids.

Question: Gram-positive encapsulated diplococci found in sputum is indicative of




Streptococcus pneumoniae.

Neisseria gonorrhea.

Question: Phenotypically identical bacteria


look the same.

are genetically exactly the same.

may be told apart by DNA sequence analysis.

may not be told apart by any means.

look the same AND may be told apart by DNA sequence analysis.

Question: Mycobacterium tuberculosis is one of the few species of bacteria that


are encapsulated.

stain Gram-negative.

are acid fast.

stain Gram-positive.

Question: Woese


was involved in determining rRNA sequences.

proposed breaking prokaryotes into two groups.

proposed breaking eukaryotes into Archaea and Bacteria.

was involved in refining the Gram stain for classification purposes.

was involved in determining rRNA sequences AND proposed breaking prokaryotes into two groups.

Question: The three domain classification scheme uses


order, phylum, class.

plants, animals, bacteria.

protista, prokaryotae, fungaea.

Archaea, Bacteria, Eucarya.

Question: The name Lactococcus (Streptococcus) lactis


indicates that the subgenus is Streptococcus.

indicates that the family is Lactococcus.

indicates that Streptococcus is the old genus name.

indicates that Lactococcus is the old class name.

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