final exam straighterline microbiology Latest

final exam straighterline microbiology Latest Update - Source with 185 Questions and 100% Verified Detailed Correct Answers Guaranteed

A diagnosis of tuberculosis involves a/an... - CORRECT ANSWER: chest X-ray, acid- fast stain of sputum, sputum culture, tuberculin skin test

A diagram of the three domains (Bacteria, Archaea, Eukarya) proceeding from the Last

Universal Common Ancestor would show Archaea - CORRECT ANSWER: branching off

the Domain Eukarya.

A group of protozoa that are not motile are the... - CORRECT ANSWER: Plasmodium

sp.

A mutation that changes a normal codon to a stop codon is called a ___ mutation -

CORRECT ANSWER: nonsense

A negative RNA virus must first - CORRECT ANSWER: synthesize a positive RNA copy of its genome

A permanent, inheritable change in the genetic information is called... - CORRECT

ANSWER: a mutation

A protozoan having flagellum would be classified in the genus - CORRECT ANSWER:

Trypanosoma

A pure culture contains... - CORRECT ANSWER: only one identified species of

microorganism

A reducing medium contains - CORRECT ANSWER: substances that remove oxygen 1 / 3

A scientist studying the sequence of nucleotides in the rRNA of bacterial species is

working on... - CORRECT ANSWER: determining evolutionary relatedness

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? - CORRECT ANSWER:

Acute infection... - CORRECT ANSWER: rapids onset of severe, short-lived symptoms

Adulthood and mating of helminths occur in which host? - CORRECT ANSWER:

Definitive host

All of the following are polysaccharides except... - CORRECT ANSWER: sterols in cell membranes.

All of the following pertain to glycolysis except - CORRECT ANSWER: it degrades

glucose to co2 and h20

All of the following pertain to nitrogenous bases except... - CORRECT ANSWER:

guanine pairs with uracil

All of the following pertain to virus envelopes except - CORRECT ANSWER: located between the capsid and nucleic acid

Among the types of microorganisms, the ___. are noncellullar - CORRECT ANSWER:

viruses

An effective test to determine whether an individual is allergic to a specific substance is

to... - CORRECT ANSWER: test for levels of IgE specific for the allergen

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An example of an amphipathic molecule found in living cells is ___ - CORRECT

ANSWER: Phospholipid

An organism that can exist in both oxygen and oxygen free environments is a... -

CORRECT ANSWER: facultative anaerobe

An organism that can use gaseous oxygen in metabolism and has the enzymes to

process toxic oxygen products is an... - CORRECT ANSWER: aerobe

An organism with a temperature growth range of 45 C to 60 C would be called... -

CORRECT ANSWER: thermophile

Antigen presenting cells... - CORRECT ANSWER: include dendritic cells. include

macrophages. engulf and modify antigen to be more immunogenic. hold and present processed antigen on their cell membrane surface.

Antiviral drugs are often difficult to develop, largely because - CORRECT ANSWER: 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

Anything that occupies space and mass is called... - CORRECT ANSWER: matter

ATP differs from the nucleotides found in the DNA in the... - CORRECT ANSWER: sugar protein of the molecule

Bacteria that require special growth factors and complex nutrients are termed... -

CORRECT ANSWER: fastidious

Bacteriophages sprayed on cold cuts are effective against... - CORRECT ANSWER:

Listeria

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