they lack a plasma membrane

Which of the following statement is incorrect regarding prokaryotic cells

it protects the cell in a hypertonic environment

Each of the following statements concerning the gram-positive cell wall is true except

water will move out of the cell

Which of the following statements best describes what happens when a bacterial cell is placed in a solution containing 5% NaCl

conjugation

A gram-positive bacterium suddenly acquires resistance to the antibiotic methicillin. this trait most likely occurred due to acquisition of new genetic information through

active transport

by which of the following mechanisms can a cell transport a substance from a lower to a higher concentration

contains cholesterol

which of the following is not a typical characteristic of most bacterial plasma membranes

fungi

which one of the following organisms has a cell wall

endospores allow a cell to survive environmental changes by producing a dormant period with no growth

which of the following statements is true

centrosomes - food storage

which of the following pairs is mismatched

mitochondrion

which of the following organelles most likely resembles a prokaryotic cell

B

Which of the drawing is a tetrad

A

which drawing in figure 4.1 posseses an axial filament

D

which drawing in figure in 4.1 is streptococci

osmotic lysis

antibiotics that target cell wall synthesis ultimately cause bacterial cell death as a result of

lysozyme

bacteria are commonly used organism for studies of genetic material in the research laboratory. The nucleic acids must first be isolated from the cells for these studies. which of the following would most likely be used to lyse gram-positive bacterial cells for nucleic acid isolation

they are sensitive to penicillin

which of the following statements about gram-negative cell walls is false

cilium

which of the following structures is not found in some prokayotic cells

binary fission

functions of the glycocalyx include all of the following except

capsule

which acts like an invisibility cloak and protects bacteria from being phagocytized

ATP

which of the following is not part of the passive transport process

lophotrichous flagella

which of the following terms best describes the cell in figure 4.2

chromatophores

in bacteria, photosynthetic pigments are found in

requires transporter proteins

the difference between simple diffusion and facilitated diffusion is that facilitated diffusion

taxic movements of the cell in response to attractants or repellents

the term "run" and "tumble" are generally associated with

has a cell wall

You have isolated a motile, gram-positive cell with no visible nucleus. you can safely assume that the cell

pili are used to transfer DNA and motility

Fimbriae and pili differ in that

B

Which diagram of a cell wall is gram-negative cell wall

B

which diagram of a cell wall possesses lipid A/endotoxin responsible for symptoms associated with infection

both A and B

which diagram of a cell wall has a structure that protects against osmotic lysis

B

which diagram of a cell wall is decolorized by alcohol

B

which diagram of a cell wall is resistant to many antibiotics

A

which diagram of a cell wall contains teichoic acids

A

which diagram of a cell wall contains porins

the plasma membrane

where are phospholipids most likely found in a prokaryotic cell

the plasma membrane, around organelles, and surrounding flagella

where are phospholipids most likely found in a eukaryotic cell

cell wall

which of the following is not found or observed to occur in both mitochondria and prokaryotes

it involves movement of molecules down a concentration gradient and may require a transport protein

which of the following statements is correct about passive diffusion

thorugh simple diffusion

oxygen crosses a plasma membrane

plasmolyze

in a hypertonic solution, a bacterial cell will typically

the cell will undergo osmotic lysis

what will happen if a bacteriacel is pretreated with a lysozyme solution, then placed in distilled water

spirilla have an external flagella but spirochetes have axial filaments

how do spirochetes and spirilla differ

ribosomes - carbon storage

which one of the following pairs is mismatched

carboxysomes

which of the following are not energy reseves

cilia - pilia

Which of the following is not a functionally analogous pair

is circular in structure

the DNA found in most bacterial cells

true

the cell walls of bacteria are responsible for the shape of the bacteria and the difference in the gram stain reaction

true

antibiotics that target the cell wall are an effective treatment against many pathogenic bacteria

false

cells placed in a hypotonic solution tend to lose water due to osmotic pressure

true

small, hydrophobic molecules pass through a cell membrane most easily by diffusion

true

spheroplasts, protoplasts, and mycoplasms are bacterial cells without cell walls

false

endospores are a reproductive structure

true

the internal structure of eukaryotic cilia and flagella are the same

false

many enzymes in both prokaryotic and eukaryotic cells are compartmentalized within organelles

true

the number of organelles such as chloroplasts, mitochondria, and rough endoplasmic reticulum is the same in all eukaryotic cells

true

if you observe rod-shaped red cells after the gram stain, you can assume their cell walls contain endotoxin

prokaryotic cells' DNA is not enclosed within a membrane and is usually single.they usually lack organelles and their cell walls contain peptidoglycan. Eukaryotic cells' DNA is found in the cell's nucleus, they have a number os membrane-enclosed organelles and their cell walls are chemically simple

characteristics of a typical prokaryotic and eukaryotic cell

the application of alcohol dehydrates the peptidoglycan of gram positve to make it more impermeable to crystals violet iodine. in gram negative, alcohol dissolves the outer membrane and leaves small holes in the thin peptidoglycan layer through which crystal violet-iodine diffuse. Gram-positive cell walls consist of peptidoglycan while gram-negative contains a few layers of peptidoglycan and anouter membrane

compare and contrast gram-positive and gram-negative cell walls

a complex aggregation of microbes. microorganisms exists as single cells that float or swim independently on a liquid or attach to each other and some solid surface. it can cause infections and its bacteria are often resistant to antibiot

What is a biofilm and what role does biofilm play in disease

remains in pairs after dividing

dipploccoci

divides and remain attached in chain-like patterns

streptococci

vibrios - curved rods

spirillum - helical shape

spirochete - helical and flexible

spiral bacteria

the structure of a prokaryotic cell

capsule

fimbriae

chromosome

pilus

flagella

arrangements of bacterial flagella

2 basal body

gram positive bacterium

4 basal bodies

gram negative bacterium

gram positive cell wall

gram negative cell wall

DNA is not enclosed withing a membrane, it is inside the cell

DNA is not associated with histones

Lack organelles

cell walls contain peptidoglycan

divide by binary fission

prokaryotes

DNA found in cell's nucleus

DNA consistently associated with histones and non histones

Have membrane -enclosed organelles

cell walls are chemically simple

cell division involves mitosis

eukaryotes

cocci - round shape

bacilli -rod-like

spiral

arrangement of cells

maintains a single shape

monomorphic

can have many shapes

pleomorphic

viscous, gelatinous sugar

glycocalyx

a glycocalyx that helps cells in a biofilm attach to their target environment and to each other

extracellular polymeric substance

capsule is neatly organized and firmly attached while slime is unorganized and loose

what is the difference between capsule and slime

bundles of fibrils that arise at the ends of the cell.

axial filament/endoflagella

axial filaments

spirochete move by the means of

helps bacterias attach to the wall

can occur at the poles of the bacterial cell or can be evenly distributed over the entire surface of the cell

fimbriae

longer than fimbriae and only one or two per cell. use to transfer plasmid

pili

primary stain. Stains both gram positive/negative purple

crystal violet

forms large crystals with the dye that are too large to escape through the cell wall

Iodine

it makes gram positive more impermeable to crystal violet-iodine

what happens to gram positive when alcohol is applied

alcohol dissolves the outermembrane and leaves holes for crystal violet to diffuse

what happens to gram negative when alcohol is applied

purple

what color does gram positive turn when safranin is applied

red

what color does gram negative turn when safranin is applied

plasma membrane have sterols (lipids). protects them from lysis (rupture)

atypical cell walls

used to identify mycobacterium and norcardia

bacteria contain mycolic acid in their cell wall

can be stained with carbolfuchsin

acid- fast cell walls

wall-less cell

protoplast

remaining outer wall layer

spheroplast

contains bacterial chromosome

the cell's genetic information which carries all the information required for the cell's structures and functions.

Nucleoid

double stranded DNA molecules. replicate independently of chromosomal DNA

plasmid

protein synthesis take place

prokaryotic ribosome - 70s ribosomes

eukaryotic ribosome - 80s

50s, 30s

ribosomes