GCSU Bachoon Microbiology Test 2 Exam
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Microbiology Test 2 Preparation/GCSU
Bachoon Microbiology Test 2 Practice Exam
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what are transposons? - ..........ANSWER.......- small segments of
DNA that can move from one chromosome to another
- in both bacteria and eukaryotes
restriction enzymes - ..........ANSWER.......- a special class of DNA
cutting enzymes that exists in many bacteria
- protect a bacterial cell by hydrolyzing phage DNA
polymerase chain reaction (PCR) - ..........ANSWER.......-
technique by which small samples of DNA can be quickly
amplified - increased to quantities that are large enough for
analysis
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- starting with just one gene sized piece of DNA, PCR can be used
to make billions of copies in only a few hours
taxonomy - ..........ANSWER.......- the science of classifying living
organisms
- similar organisms are placed in the same taxa (group)
systemics or phylogeny - ..........ANSWER.......- the study of the
evolutionary history of a group of organisms
- phylogenic relationship: organism with a common ancestor
what year was the term prokaryotic introduced and what is it? -
..........ANSWER.......- 1937
- cell with no nucleus
- 2 types: bacteria, archaea
what are the 3 domains? - ..........ANSWER.......1) eukarya
2) bacteria
3) archaea
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what are the 3 domains based on? - ..........ANSWER.......- based
on 165 DNA
what was one of the earliest cells found on the planet? -
..........ANSWER.......- a bacteria called Thermatoga maritina
- it has genes similar to bacteria and archaea
where can a description of bacteria be found? -
..........ANSWER.......- Bergeys Manual
what is a prokaryotic species? - ..........ANSWER.......a population
of cells with similar characteristics (>70% DNA hemology)
strains - ..........ANSWER.......a collection of cells derived from a
single cell
prokaryotes are identified by using what? - ..........ANSWER.......-
metabolic reactions
- cell wall structure
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- differential staining
serology - ..........ANSWER.......- the science that studies serum and
immune responses that are evident in serum
- microorganisms are antigenic: upon entering an animals body,
they stimulate it to form antibodies
DNA base composition - ..........ANSWER.......- the moles
percentage of guanine plus cytosine in an organism's DNA
- used to draw conclusions about relatedness
Why do we study microbial growth? - ..........ANSWER.......1) to
prove what causes disease
2) for antibiotic susceptibility (how to kill)
3) for research