Eukaryotes have ________ in their cytoplasmic membranes, which serve to strengthen and stabilize the membrane and make it less flexible. Many bacteria have similar molecules, known as ________, in their cytoplasmic membranes that have a similar role.
A) ether bonds / ester bonds
B) lipids / phospholipids
C) sterols / hopanoids
D) phospholipids / lipopolysaccharides
Type IV pili are involved in
A) attachment of cells to surfaces.
B) twitching motility.
C) pathogenesis.
D) attachment to surfaces, twitching motility, and pathogenesis.
The peptide interbridge crosslinking between peptidoglycan layers is found ONLY in the cell walls of
A) Archaea.
B) Eukarya.
C) gram-positive Bacteria.
D) gram-negative Bacteria.
Small acid-soluble proteins (SASPs) protect DNA from ultraviolet light and are found in high numbers within
A) gram-positive Bacteria.
B) endospores.
C) inclusion bodies.
D) gram-negative Bacteria.
Based on the table of attributes given below, which of the following statements are FALSE about the two organisms?
Characteristic Bacterium A Bacterium B
Endospore formation yes no
Capsule no yes
Type IV pili yes no
Flagella no no
Morphology bacillus bacillus
A) Bacterium A is more resistant to heat and ultraviolet light.
B) Bacterium B likely forms a slime layer better than Bacterium A.
C) Bacterium B is likely to exhibit motility.
D) Both bacteria may attach to surfaces.
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