On what basis have bacteria traditionally been classified?

1. Shape of colony2. Size of colony3. Gram stain4. All of the above

Shape of c

olony

0% 0%0%0%

Gram-positive bacteria

appear purp

le after Gra

...

frequently

cause

disease

...

have a thick

er lay

er of p

...

All of t

he above are tr

ue

0% 0%0%0%

1. appear purple after Gram staining

2. frequently cause diseases that cannot be cured by antibiotics

3. have a thicker layer of peptidoglycan

4. All of the above are true

Gram positive bacteria differ from Gram-negative bacteria in

1. their response to the Gram stain

2. their susceptibility to antibiotics

3. the make up of their cell walls

4. All of the above

their r

esponse

to th

e G...

0% 0%0%0%

One structure you would NOT find in a bacteria cell is a

cell w

all

Cell membra

ne

Mito

chondria

chro

mosome

0% 0%0%0%

1. cell wall 2. Cell membrane3. Mitochondria4. chromosome

Bacteria cells have

a cell w

all only

a cell m

embrane only

both a

cell m

embrane a..

a cell w

all insid

e of their.

..

0% 0%0%0%

1. a cell wall only2. a cell membrane

only3. both a cell

membrane and an outer wall

4. a cell wall inside of their cell membrane

The most commonly encountered bacteria are roughly spherical. The microbiological term describing this

shape is

Coccus

Bacillu

s

spiril

la

0% 0%0%

1. Coccus2. Bacillus3. spirilla

Another common bacterial shape is that of a rod, often called

Coccus

Bacillu

s

spiril

la

0% 0%0%

1. Coccus2. Bacillus3. spirilla

In bacterial cells, ribosomes are packed into the cytoplasmic matrix and also loosely attached to the plasma membrane. What is the function of

ribosomes?

Site

of energ

y...

Site

of pro

tei...

Contains t

he g...

Lets

things

in...

0% 0%0%0%

1. Site of energy production

2. Site of protein synthesis

3. Contains the genetic material

4. Lets things in and out of the cell

Which of the following statements regarding bacterial DNA is true

Bacte

ria only ...

It is

a single...

It co

ntains h

i...

It is

only sin...

0% 0%0%0%

1. Bacteria only possess 4 chromosomes

2. It is a single circular loop

3. It contains histone proteins

4. It is only single stranded

Petri dishes are incubated in an inverted position in order to prevent

condense

d mois.

..

The agar f

rom ...

the co

lonies f...

The bacteria

f...

0% 0%0%0%

a. condensed moisture from dropping onto the colonies, thus contaminating them directly.

b. The agar from drying out.c. the colonies from sinking

into the medium.d. The bacteria from over-

heating.

Cloudiness is a sign that bacteria have grown in a _______________ after

inoculation and incubation.

streak plate

tube of n

utrie...

Gram

stain

Simple st

ain

0% 0%0%0%

1. streak plate2. tube of nutrient

broth3. Gram stain4. Simple stain

The optimum temperature for incubating an organism is the one at which

it gro

ws with

...

it has t

he lon...

it is

near one...

its enzy

mes be...

0% 0%0%0%

1. it grows with the shortest generation time

2. it has the longest time between cell divisions

3. it is near one extreme of its range of tolerated temperatures

4. its enzymes begin to denature

The stage of bacteria growth where death and growth are equal

Lag

Log

Stationary

death

0% 0%0%0%

1. Lag2. Log3. Stationary4. death

E.Coli bacteria are

Gram

-nega

tive ...

Gram

negative

...

Gram

positive ...

Gram

positive ...

0% 0%0%0%

1. Gram-negative cocci2. Gram negative

baccili3. Gram positive cocci4. Gram positive baccili

The process in which the chromosomes of a bacteria replicates and the cell divides is called

Transducti

on

Binary fissi

on

Conjugation

Meiosis

0% 0%0%0%

1. Transduction2. Binary fission3. Conjugation4. Meiosis

Prokaryotes are unlike all other organisms in that their cells

Lack

nuclei

Have

cell w

alls

Have

organelle

s

Lack

nucleic

acids

0% 0%0%0%

1. Lack nuclei2. Have cell walls3. Have organelles4. Lack nucleic acids

Which statement is true about bacteria?

Bacte

ria are

living orga

n...

Bacte

ria are

the sm

allest

..

Bacte

ria are

the oldest

...

All thre

e state

ments are

...

0% 0%0%0%

1. Bacteria are living organisms that consist of one cell.

2. Bacteria are the smallest of all living things.

3. Bacteria are the oldest and most diverse life forms.

4. All three statements are true.

There are three common shapes of bacteria. They are

rods,

sphere

s, and sp

irals.

rods,

spira

ls, and tu

bes.

sphere

s, hexa

gons, and ...

none of the above.

0% 0%0%0%

1. rods, spheres, and spirals.

2. rods, spirals, and tubes.3. spheres, hexagons, and

spirals.4. none of the above.

What has caused some bacteria to become drug-resistant?

the m

isuse

of antibiotics

..

that 5

0 percent o

f all a

nt...

both 1 and 2

none of the above

0% 0%0%0%

1. the misuse of antibiotics to try and cure viral infections like the common cold

2. that 50 percent of all antibiotics end up in animal feed, creating super bacteria

3. both 1 and 24. none of the above

When streaking a plate, the loop should be flamed

At the beginning and end

At the beginning and e..

At the beginning and e..

At the beginning and e..

0% 0%0%0%

1. At the beginning and end 2. At the beginning and end

and between the first 2 quadrants

3. At the beginning and end and between the second and third quadrants

4. At the beginning and end and between each quadrant