asdf

A microorganism has been described to you as living in hot acidic habitats in the waste pile of coal mines that regularly sustain a ph of 1 and a temp of 60 c Which type of organism do you immediately assume it is?

Archaea

According to current thought regarding the domains of life, which two domains are believed to be the most closely related

Archaea and Eukarya

The gram stain, acid fast and endospore stain

Are differential stains

Which structure protects bacteria from being phagocytized

Capsule

The outcome of the gram stain is based on differences in the bacterial cells

Cell wall

Which of the following is not a bacterial appendage

Cilia

When a rod shaped bacteria is short and plump, it is called a

Coccobacillus

sarcina refers to an arrangement of cells in

Cuboidal packet of cells

The cell ? is composed of three layers: the glycocalyx, the cell wall, and the cell membrane

Envelope

The prokaryotic flagellum has threee parts, the ?, the hook and the basal body

Filament

Identify the 53 on the diagram provided

Fimbriae

The short, numerous bristle like appendages used by some bacterial cells for adhering to surfaces are called

Fimbriae

Which of the following reagents reacts with crystal violet as the mordant

Grams iodine

The bacterial chromosome...

Is part of the nucleoid

A bacterial cell that exhibits a single group of flagella is called

Monotrichous

An important indicator of evolutionary history is the

Nitrogen base sequence of RNA

Cells form a ? arrangement when cells in a chain snap back upon each other forming a row of cells side by side

Palisades

The term that refers to presence of flagella all over the cell surface is

Peritrichous

movement of a cell toward a chemical stimulus is termed

Positive chemotaxis

The most immediate result of destruction of a cell's ribosomes would be

Protein synthesis would stop

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

Sex Pili

The process of endospore formation is ?, while the process of an endospore growing into a vegetative cell is

Sporulation, germination

Which of the following does not form endospores

Staphylococcus

The difference in cell wall structure of mycobacterium and nocardia compared to the typical gram positive bacterial cell wall structure is

The predominance of unique, waxy lipids

All of the following are correct about biofilms exept

They are harmless aggregations of microbes

Bacteria in the genus Mycoplasma and L-forms lack cell walls

True

Endospores of certain bacterial species can enter tissues in the human body, germinate, and cause an infections disease

True

Fixed smears of specimen are required in order to perform a gram stain and an endospore stain true or false

True

The prokaryotic cell membrane is a site for many enzymes and metabolic reactions

True

Endospores are

all these are correct

The periplasmic space is

an important reaction site for substances entering and leaving the cell.

Which of the three domains includes organisms that would be most likely to survive the environmental conditions that existed on Earth long time ago

archaea

identify 52 on the diagram

cell membrane

Peptidoglycan is a unique macromolecule that composes the bacterial

cell wall

Bacteria and archaea can be differentiated from one another by the

chemical makeup of the cell wall

All bacterial cells have

chromosome

Gram negative bacteria do not have peptidoglycan in their cell walls True or false

false

If during the gram stain procedure, the bacterial cells were viewed immediately after crystal violet was applied, gram-positive cells would be purple but gram negative cells would be colorless

false

Iodine is the decolorizer in the gram stain true or false

false

The region between the bacterial cell membrane and the cell wall is called the outer membrane

false

The term diplococci refers to an irregular cluster of spherical bacterial cells.

false

Identify the 55 on the diagram provided

flagella

A prokaryotic cell is primarily composed of a thick layer of peptidoglycan with small amounts of teichoic acid and lipoteichoic acid is

gram positive

lipopolysaccharide is an important cell wall component of

gram-negative bacteria

A bacterial cell exhibiting phototaxis probably has

granules

All of the following are correct about a slime layer except

it enables movement of cells

A bacterial genus that has waxy mycolic acid in the cell wall is

mycobacterium

Spirochetes have a twisting and flexing locomotion due to appendages called

periplasmic flagella

identify 54 of the diagram

pili

Which cell structure is an important component in modern genetic engineering techniques

plasmida

which is mismatched

plasmids

The function of bacterial endospore is

protection of genetic material during harsh conditions

which term is not used to describe bacterial cell shapes

tetrad

At the end of the gram stain, gram positive bacteria will be seen as purple cells

true