BIO-205 Microbiology Midterm Exam Latest

BIO-205 Microbiology Midterm Exam Latest Update -from Credible Source with 160 Questions and 100% Verified Correct Answers Guaranteed A+ Approved by Professor

A breath test assaying for radioactive carbon dioxide may be used to indicate the

presence of - CORRECT ANSWER: Helicobacter pylori

A clever technique that streamlines the identification of auxotrophic mutants is -

CORRECT ANSWER: replica plating

A hot tub would most likely contain - CORRECT ANSWER: mesophiles

A key feature of a viral infections is the - CORRECT ANSWER: separation of viral nucleic acid from the capsid

A limiting factors for viral infection is - CORRECT ANSWER: presence of specific receptor molecules on the host cell

A medium that enhances the growth of one particular organism and inhibits the growth of organisms other than one being sought in a mixed population is termed a(n) -

CORRECT ANSWER: selective medium

A phage that replicates inside the host cell and then lyses its host during its release is a

- CORRECT ANSWER: virulent or lytic phage

A quick microbiological test for potential carcinogens was developed by - CORRECT

ANSWER: Ames

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A selective growth medium - CORRECT ANSWER: allows only certain bacteria to grow

A soluble greenish pigment is produced by - CORRECT ANSWER: Pseudomonas

aeruginosa

A tangle of fungal hyphae is generally known as a - CORRECT ANSWER: mycelium

A urine sample with more than 100,000 organisms is considered indicative of infection.If a urine sample containing 5,000 bacteria with a generation time of 30 minutes sits for

• hours before finally being assayed, how many bacteria will then be present? -

CORRECT ANSWER: 320,000

A virion is a(n) - CORRECT ANSWER: complete, extracellular virus particle

Aflatoxins - CORRECT ANSWER: are produced by Aspergillus, are possible

carcinogens, may be found in peanuts, and are toxins.

Agar - CORRECT ANSWER: has chemical and physical properties that make it almost

ideal for solidifying media

All fungi have ____ in their cell walls. - CORRECT ANSWER: chitin

All known species of bacteria are described in Bergey's Manual of Systematic

Bacteriology. - CORRECT ANSWER: True

All the bacterial cells that result from the replication of a single organism are said to be -

CORRECT ANSWER: pure culture

Allosteric enzymes - CORRECT ANSWER: have an additional binding site that is

involved in regulating enzyme activity

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An infection in which the virus is continually present in the body is referred to as -

CORRECT ANSWER: persistent

Bacteria are useful to study because - CORRECT ANSWER: They produce protein in a similar manner to more complex organisms.They replicate DNA in a similar manner to more complex organisms.They produce energy in a similar manner to more complex organisms.They are grown quickly, easily, and cheaply.

Bacteria may be stored - CORRECT ANSWER: on a slant in the refrigerator, frozen in glycerol solution, and lyophilized

Bacteriophages and animal viruses - CORRECT ANSWER: differ because

bacteriophages leave the capsid outside the cell, while animal virus entry involves the entry of the whole nucleocapsid.

Biofilms - CORRECT ANSWER: are a polysaccharide-encased community of

microorganisms, may enhance bioremediation efforts, and may protect organisms against harmful chemicals.

Bioremediation refers to - CORRECT ANSWER: using bacteria to clean up pollutants

Biosynthetic reactions that require energy for the conversion of molecular subunits into

larger molecules are called - CORRECT ANSWER: anabolic reactions

Blood agar - CORRECT ANSWER: is often used to culture clinically relevant bacteria and may be used as a differential media

Carbon, hydrogen, oxygen, nitrogen, phosphorous, and sulfur may be considered -

CORRECT ANSWER: major elements

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