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Flashcards in microbio lab final Deck (47):
1

Algae

eukaryotic, protist, simple nonflowering plant of a large group that includes the seaweeds and many single-celled forms. Algae contain chlorophyll but lack true stems, roots, leaves, and vascular tissue.

2

amylase

enzyme which hydrolyzes large starch molecules by breaking the bonds between the constituent glucose molecules.

3

antiseptic

stop the growth of microorganisms but are mild enough to be used on living tissue.

4

aseptic techniques

skills used to prevent contamination of a growing species in a laboratory. example- heating inoculating loop, flaming head of test tube.

5

budding

a type of asexual reproduction. The nucleus divides and forms a daughter cell, eventually breaking away from the parent cell.

6

casein

main protein in milk

7

catalase

enzyme that breaks down hydrogen peroxide into oxygen and water. Protects the cell from oxidative damage.

8

CFU

colony forming unit. A single bacterium can multiply and divide into a colony of many bacteria.

9

Clone

genetically identical cells

10

coliforms

bacteria found in the intestinal tract of humans and animals. They are facultatively anaerobic, bacillus shaped, gram negative. They ferment lactose to produce gas.

11

colony

a mass group of cells

12

contrast

substances that differ from each other

13

curds

forms when milk sours, used for the basis of cheese.

14

cysts

a closed pouch of tissue containing fluid

15

detritus

waste or debris of any kind

16

dilution blank

same as a diluent, putting the factor into a large solution to dilute it.

17

dimorphic

the existence of two different forms of a species especially in the same population.

18

disinfectant

antimicrobial substances such as bleach and lysol. used to kill or stop the growth of pathogens on inanimate objects.

19

endospore

produced by the cell when its in extreme conditions to protect itself from heat and other harmful things.

20

epidemiology

science that deals with the transmission of disease.

21

eukaryotic

has a nucleus. includes fungi, plants and animals.

22

heterotrophic

An organism that cannot synthesize its own food and is dependent on complex organic substances for nutrition.

23

hypha

each of the branching filaments that make up the mycelium of a fungus.

24

index case

the original patient that caused the spread of the disease, either genetic or not.

25

magnification

the process of looking at something bigger

26

molds

multicellular fungi

27

mordant

a substance, typically an inorganic oxide, that combines with a dye or stain and thereby fixes it in a material, iodine on gram stain.

28

mutagen

Because UV light causes mutations, it is referred to as a mutagen.

29

mutation

errors in DNA make it so it cannot be used for protein synthesis and cannot be replicated accurately.

30

mycelium

the vegetative part of a fungus, consisting of a network of fine white filaments (hyphae)

31

nosocomial infection

infections acquired in hospitals and health care settings.

32

parfocal

refers to objectives that can be changed with minimal or no refocusing.

33

prokaryotic

no nucleus, example: bacteria. single celled, DNA floats freely.

34

protease

enzymes that hydrolyze protein

35

protozoa

any of a diverse group of eukaryotes of the kingdom protista, that are primarily unicellular. Include flagellates, ciliates, sporozoans, amoebas, and foraminifers.

36

puerperal sepsis

childbed fever, it was the infection that was killing women following childbirth.

37

pure culture

all the cells in a colony belong to the same species and strain of bacteria.

38

reservoir

the source of the pathogen, where the microbe was first found, its original home.

39

resolution

the smallest distance between two points on a specimen that can still be distinguished as two separate entities. How much detail you can see. Ability to distinguish detail.

40

serial dilution

involves repeatedly mixing known amounts of source culture with sterilized liquid.

41

spectrum of activity

broad spectrum vs. narrow spectrum. The way to measure how susceptible/resistant a microbe is.

42

Ultraviolet light

light with wavelengths less than that of violet light. Includes electromagnetic radiation that has a wavelength between 4 and 400 nm.

43

vector

an organism, typically a biting insect or tick, that transmits a disease or parasite from one animal or plant to another.

44

Whey

the watery part of milk that remains after the formation of curds.

45

working distance

the distance between the slide and the lens of the microscope.

46

yeasts

a microscopic fungus consisting of single oval cells that reproduce by budding, and are capable of converting sugar into alcohol and carbon dioxide.

47

zone of inhibition

if the bacteria are inhibited by a certain drug the halo of no growth will appear.