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introduction to micro

The microorganisms that do not have a nucleus in their cells are called:


Which activity is an example of biotechnology

humans using yeast to make beer and wine

Koch's postulates are criteria used to establish that:

a specific microbe is the cause of a specific disease

Helmiths are

parasitic worms

organisms called parasites are:

always harmful to the host

all of teh following pertain to the atom14/6 C except

has 14 neutrons

what is the maximum number of electrons in the second energy shell of an atom?


which of the following represents a synthesis reaction

A+B-----> AB

One nucleotide contains:

all of the choices are correct

All of the following are processes that define life except

the ability to invade host cells

which of the following is essential for development of discrete, isolated colonies

solid media

If a microbiologist studying a specimen at a total magnification of 950X, what is the magnifying power of the objective lens if the ocular lens is 10X?


This microscope achieves the greatest resolution and highest magnification:


The gram stain acid fast stain and endospore stain have the following in common

are differential stains

A microbiologist makes a fixed smear of bacterial cells and stains them with loeffler's methylene blue. All the cells appear blue under the oil lens. This is an example of

simple staining

Spirochetes have a twisting and flexing locomotion due to appendages called

periplasmic flagella

The transfer of genes during bacterial conjugation involves rigid, tubular appendages called

sex pili

All of the following structures contribute to the ability of pathogenic bacteria to cause disease


the bacterial chromosome

is part of the nucleoid

Endospores are

all the choices are correct

Protists include

all the choices are correct

histones are

proteins associated with DNA in the nucleus

The eucaryotic cell's glycocalyx is

mostly polysachharide

Organelles found in algae but not found in protozoa or fungi are the


the cytoskeleton

all of the choices are correct

larvae and eggs are developmental forms of


Which of the following represents a virus family name


Helical and icosahedral are terms used to describe the shapes of a virus


The correct sequence of events in viral multiplication is

adsorption, penetration, replication, assembly, maturation, release

Host range is limited by

type of host cell receptors on cell membrane

oncogenic viruses include all the following except

measles virus

infectionous protein particles called


microorganisms require small quantities of the nutrient for enzyme function and maintenance of protein structure:

trace element

An important mineral ion of the cytochrome pigments of cellular respiration is


The type of photosynthesis that does not produce oxygen;

occurs in certain bacteria

A microorganism that has an optimum growth temp at 37 C but can survive short exposure to high temps is a


the time interval from parent cell to two new daughter cells is called the

generation time

An apoenzyme

contains the active site

a holoenzyme is a combination of a protein and one or more substances called:


Most electron carriers are


all of the following are exoenzymes except

ATP synthase

When glucose is broken down by glycolysis during bacterial fermentation, how many atp are generated?


Electrons are ejected from atoms in cells when organisms are exposed to

gamma rays and X rays

which of the following is not a heavy metal

tincture of iodine

all of the following are alkylating control agents except


all the following act as a surfactants except


Ethylene oxide is


antibiotics are derived from all the following except


Penicillins and cephalosporins

damage cell membranes

the drug used for several protozoan infections is


antivirals that target reverse transcriptase would be used to treat


Acyclovir is used to treat

herpes zoster virus

Endogenous infectious agents arise from microbes that are

the patients own normal flora

which genus is resident flora of the mouch, large intestine, and from puberty to menopause, the vagina


microbial hyaluronidase, cogulase, and streptokinase are examples of


Nosocomial infections involve all the following except

are only transmitted by medical personnel

when would koch's postulates be utilized:

determination of the cause of a patient's illness in a hospital microbiology lab


temp 15-0C cant grow above 20. COLD

Protists include

Algae and protozoa

The eucaryotic cells glycocalyx is

mostly polysachrides

Organelles found in algae but not protozoa or fungi are


The cytokeleton

all of these are correct

which is not a characteristic of fungi


cell walls are not found on typical cells of


infectionous naked strands of RNA called


Creutzfeild jacobs disease is

a spongiform encephelopathy of humans

which microorganisms find hypotonic conditions most detrimental


a halophile grows best in

a salt lake

enzymes that are produced when substrates is present are

induced enzymes

alcohol fermentation produces

alcohol and CO2

what test is used for testing infectious dose

Kirby bauer test

whats a HEPA test for

all are correct

Physical agents for controlling microbes growth includes all but

hydrogen peroxide

Dry heat

is less effective than most

Easiest microbes to kill


chemicals that produced highly reactive radicals

hydrogen peroxide

penicillans and cephalosporins

block peptides that cross link glycon molecules

side effects in patients tissues

development of resistance to dmg

knochs postulates

determination of cause new disease in a lab

the doughnut


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