Exam 3: Bacterial Cell Structure

Which of the following protects bacteria from lysis in dilute solutions and helps to determine their cellular morphology or shape?

If you remove the peptidoglycan layer from a Gram-positive cell,it would still stain purple with a Gram stain.

Bacteria growing at lower temperatures have more saturated fatty acids in their membranes.

Permease proteins that aid in the transport of nutrients resemble enzymes in their specificity for the substance to be transported.Each carrier is selective and will transport only a closely related set of substances.

Nutrients can be concentrated from dilute solutions by

Endospores represent a challenge to the fields of industrial and medical microbiology because

Which bacterial structure may survive if temperatures applied during food preservation processes are too low?

Proteins that are loosely associated with the cytoplasmic membrane are called __________ proteins.

The lipopolysaccharide (LPS)that is found in the outer membrane of gram-negative bacteria is also known as

Endotoxic shock,resulting from the release of endotoxin by bacteria infecting a patient,is only caused by Gram-negative bacteria.

Intracellular granules of organic or inorganic material that are stockpiled by bacteria for future use are called __________.

Sedimentation coefficients are proportional to the molecular weight of a particle and are not affected by the volume and shape of the particle.

Some photosynthetic bacteria produce gas vacuoles that regulate their buoyancy but contain no lipid.

Organisms usually have only a single transport system for any nutrient.

Endospores are reproductive structures.

When the cell wall is removed from a Gram-negative bacterium without removing the outer membrane,the resulting form is called a(n)__________.

Small organic molecules called __________ function as enzyme cofactors.

The power used by most bacterial flagellar motors is produced by

Actinomycetes form long filaments called ___________.

Many bacteria facilitate the uptake of iron by secreting low molecular weight molecules,called ___________,to form complexes with the iron that can then be readily transported into the cell.