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WGU Microbiology C453 Objective Assessment Study Guide March 2019

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Alteration of a metabolic pathway

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Mar 1, 2020

Cards (21)

Section 1

(21 cards)

Alteration of a metabolic pathway

Front

bypasses a reaction inhibited by antimicrobial agent that occurs in other sulfonamide resistant bacteria. These organisms have acquired the ability to use ready made folic acid from their environment, no longer need to make it from PABA

Back

Double stranded RNA viruses

Front

during infection dsRNA is transcribed to mRNA, produces protein necessary to ensure replication and encapsidation Example: reoviridae

Back

Hyphae

Front

loosely organized mass of threadlike structures located in the body of the fungus, can form long extended filaments, can regrow from fragments that have broken off allowing some fungi to survive and spread.

Back

Single stranded DNA viruses

Front

example: parroviridae

Back

Ascomycota

Front

Produces sac-like structure that releases spores during sexual reproduction. Have a central pore. Examples: sac-fungi, yeast

Back

Basidomycota

Front

Have hyphae aggregated to form mycelia & have club shaped sexual structures called basida Reproduce sexually Examples: mushrooms, cryptococcus, toadstools, ruts, smuts

Back

Alcohols

Front

Mode of action: denature proteins when mixed with water, dissolves membranes Uses: disinfects skin and aerosols

Back

Hemlinths

Front

worm-like organisms, living in/feeding on hosts, receiving nourishment and protection while disrupting host's absorption causing weakness and disease Examples: flukes, tapeworms, roundworms

Back

Diseases caused by protozoa

Front

amoebic dysentary, malaria, sleeping sickness, toxoplasmosis

Back

Function of Pili & how are they used to promote infection?

Front

cause cells to clump, enhance colonization on surfaces of cells and other organisms. Attaches 2 cells, furnish a pathway for transfer of DNA

Back

How do enveloped viruses gain their envelope?

Front

acquired after they are assembled in a host cell as they bud, or move through, one of several membranes

Back

Zygomycota

Front

produces spores though conjugation, sexually or asexually. can be carried by air currents Example: bread molds, rhizopus

Back

Function of endospores

Front

helps organism survive, survives adverse environmental conditions for long-periods of time

Back

Positive sense single-stranded RNA viruses

Front

RNA genomes ready for immediate translation during infections by host's ribosomes examples: piconavindae, togaviridae, flavivirdae, retroviridae

Back

Negative sense single stranded RNA viruses

Front

other RNA genomes that have to be converted into proper form to be made into proteins Examples: paramyxovirdae, rhabdoviridae, orthomxyoviridae, filoviridae, buonyaviridae

Back

Dimorphic

Front

the ability of an organism to alter it-s structure when it changes habitats. Examples: histoplasma, bread molds, athlete's foot, sac fungi, club fungi, fungi imperfecti

Back

Fungi

Front

eukaryotic, decomposers, non-motile, gain nutrition through absorption

Back

Double stranded DNA viruses

Front

example: adenoviridae, herpesviridae, poxviridae, papoviridae, hepdaviviridae

Back

ALkylating Agents

Front

Mode of action: disrupt structure of proteins & nucleic acid. Used to disinfect/sterilize inanimate objects that would be harmed by high temperatures Example: Formaldehyde

Back

Basic characteristics of a virus

Front

tiny, non-living, requires host, invades and replicates inside living cell containing DNA or RNA

Back

Protozoa

Front

-one celled organisms -have a nucleus -live in H2O or as parasites

Back