Shared Flashcard Set

Details

Viral/Bacterial Study
terms dealing with bacteria and viruses
27
Science
7th Grade
11/20/2008

Additional Science Flashcards

 


 

Cards

Term
What are bacteria
Definition

.primitive cellular organisms

.first forms of life on earth

.most abundant life form

.live everywhere

Term
How are bacteria measured
Definition
in microns
Term
Name the 2 types of bacilli
Definition

diplobacilli-paired bacilli

streptobacilli-string of bacilli

Term

Name the 3 types of bacteria

 

Definition

coccus/cocci-round

bacillus/bacilli-rod shape

spirillum/spirilla-spiral or coiled shaped

Term
Name the 5 types of cocci
Definition

.diplococcus-a pair of cocci

.staphylococcus-clusters of cocci

.streptococcus-chains of cocci

.tetrad-group of 4 cocci

sarcina-cubes of cocci

Term
What is a spirrilum
Definition
cork screw  or coiled shape
Term
What does the plasma membrane do in the bacterial cell
Definition

it marks the edge of the cytoplasm

Term
What does the cell wall do in a bacterial cell
Definition
gives it shape
Term
What does the nuclear area contain in a bacterial cell
Definition
DNA
Term
What is the slime layer
Definition
protects the cell and enables it to stick to the surface of its food source
Term
capsule
Definition
protects the cell from body defences
Term
Name the 2 movements in a bacterial cell
Definition
Flagellar and Brownian
Term
What is flagellar motion
Definition
Twisting/Quivering
Term
What is Brownian movement
Definition
Bouncing/Oscillating
Term
List the conditions for good growth in a bacterial cell
Definition

.suitable temperature-80 to 100

.moisture-need water

.darkness-need darkness

.food source-eat everything

Term
What are autotropic bacteria
Definition
make their own food
Term

What are heterotropic bacteria

Definition
find their food
Term

What are saprophytes

Definition
eat dead matter
Term
What are paraisites
Definition
eat living things
Term
What is a host
Definition

the organism which supports the paraisite

Term
Do all bacteria require oxygen
Definition
only some require atmospheric oxygen
Term
What method of reproduction do bacteria have
Definition
binary fission
Term
Which bacteria reproduces sexually
Definition
E. coli
Term
What causes a colony of bacteria to die out
Definition

.overcrowding

.competition for food.accumulation of wastes

Term
What is endospore formation used for
Definition
protection against adverse environmental conditions
Term
What are some beneficial uses
Definition

vinegar making

sauerkraut

tanning of leather

retting of flax

silage

Term
How do we preserve food from spoiling
Definition

pasteurization

salt curing

canning

quick freezing

radiation

Supporting users have an ad free experience!