Exam 1: The Evolution of Microorganisms and Microbiology

Charles Chamberland developed porcelain filters that allowed other scientists to demonstrate that viruses are smaller than bacteria.

The use of enrichment cultures and selective media was pioneered by

Old cultures of bacteria that have lost their ability to cause disease are said to be

Who of the following first discovered that some blood leukocytes could engulf disease-causing bacteria?

Which molecule is believed to have preceded the other three during the evolution of life?

In a search for new antibiotics,a previously unknown organism has been recovered from the soil.It is nonmotile and is composed of long threadlike structures formed from nucleated cells.It is not-photosynthetic and absorbs its nutrients.This organism will most likely be classified among the

Three the SSU rRNA sequences of 3 organisms have been compared.For organisms 1 and 2,two of the twelve nucleotides in the sequence are different.For organisms 1 and 3,six of the twelve nucleotides are different.Which organism has greater evolutionary distance from organism 1?

M.J.Berkeley demonstrated that the great potato blight of Ireland was caused by a fungus.

__________ was the first to isolate a root nodule bacterium capable of nitrogen fixation.

Fanny Hesse first suggested that agar be used to solidify microbiological media.

A student is observing microorganisms in a sample of pond water.One organism of interest has an obvious nucleus and has been moving rapidly during observation and appears to have rows of cilia along its surface.In which of the following groups would this microbe most likely be classified?

The first disease to be identified as being caused by a virus was tobacco mosaic disease.

Edward Jenner's work in preventing rabies led to the use of the term vaccination to describe a type of procedure used in the prevention of disease.

Which group of microbes contains organisms necessary for production of wine and bread?

The relationship between specific bacteria and specific diseases was first demonstrated by Koch.

Which of the following distinguish the field of microbiology from other fields of biology?

The usefulness of agar in solidifying microbiological growth media is limited because it does not remain solid at temperatures above 28^oC.

All eukaryotes have a membrane-delimited nucleus.

Morphovars,serovars,biovars,and pathovars are examples of terms that refer to microbial _______________.

Koch's postulates were instrumental in establishing that Mycobacterium leprae is the cause of leprosy.