Exam (elaborations)
STRAIGHTERLINE MICROBIOLOGY QUIZ 2024
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- BIO250L Microbiology Lab
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STRAIGHTERLINE MICROBIOLOGY QUIZ 2024/ STRAIGHTERLINE MICROBIOLOGY QUIZ 2024
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STRAIGHTERLINE MICROBIOLOGY QUIZ 20241. In the nitrogen cycle, which of the following steps involves removal of
nitrogen from the atmosphere by bacteria: Nitrogen Fixation
2. If enough H+ ions are added to pure water to raise the H+ concentration
of the solution to ten times higher than the original concentration, what is
the resulting OH- concentration of the solution: 10-8 M
3. Which scientific field is involved in the identification, classification, and
naming of organisms: Taxonomy
. Which type of medium would be the best choice when shipping a sample of
bacteria from a clinic to a laboratory for testing: Transport-meduim
. Which activity is an example of biotechnology: the production of human
insulin
6. Which of the following is produced by adding 1% to 5% agar to nutrient
broth that is then boiled and cooled: A solid medium
. Most biochemical macromolecules are polymers, which are chains of...:
repeating monomers
. A reducing medium contains: substances that remove oxygen
. Which of the following parts of a microscope magnifies the specimen to
produce a real image of the specimen: Objective lens
,0. The two major groups of helminths are ___ and the ___: roundworm;
flatworms
11. All of the following pertain to virus envelopes except: located between
the capsid and nucleic acid
12. A protozoan having flagellum would be classified in the genus:
Trypanosoma
3. Antiviral drugs are often difficult to develop, largely because: viruses are
obligate intracellular parasites so the drugs must enter the host cell and often
cause toxic side effects in order to destroy the virus
4. The activation of a prophage is called...: induction
5. Endospores are: metabolically inactive, resistant to heat and chemical
destruction, resistant to destruction by radiation, living structures
6. The endosymbiotic theory has been developed to explain the emergence
of...: eukaryotes
7. A treatment for bacterial infections from the early 20th century has made a
comeback; the use of bacterial viruses to eliminate bacterial infections.
Which explanation most accurately describes the reason for return of this
treatment:
8. A negative RNA virus must first: synthesize a positive RNA copy of its genome
9. You've just isolated a new bacterium in pure culture, and you culture it on a
general purpose medium where its cells have a coccobacillus morphology.
When you examine the cells after culturing on a variety of differential media,
, you fine that in some cases, the cells appear as coccobacillus, but in others,
they can be filamentous, cocci, or club-shaped. The best explanation for
this observation is that: the bacterium is pleomorphic
20. Two functions of bacterial appendages are___ and ___: attachment;
motility
1. A group of protozoa that are not motile are the...: Plasmodium sp.
2. During the Gram stain, the appplication of alcohol results in the
decolorization of ___ cells: Gram-negative
3. Lysozyme is most effective against: gram positive organisms
4. The transfer of genes during bacterial conjugation involves rigid, tubular
appendages called ___: sex pili
5. Which of the following does not pertain to helminths: Members of the
Kingdom Protista
6. The site for ATP synthesis in bacterial cells is the...: cell membrane
7. The core of every virus particle always contains...: Either DNA or RNA
8. Which of the following is not a function of the eukaryotic glycocalyx: -
Movement
9. Two noncellular agents, smaller than viruses, are the infectious proteins
called _____ and the infectious RNA strands called _____.: Prions; viroids
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