Assignment #3

Which of the following is NOT a component of bacterial flagella?
tubulin

Which of the following bacterial cell structures plays an important role in the creation of biofilms?
both fimbriae and glycocalyces

Cytoplasmic membranes of ________ are composed of phospholipids.
 bacteria and eukaryotes

If a eukaryotic cell suffers damage to its mitochondria, which of the following processes of life would be most immediately affected?
Energy Production

Bacteria of the genus Mycoplasma lack cell walls. What sort of environment do they require for survival?
 isotonic

Lipid A is a component of
lipopolysaccharides.

A bacterial cell possesses a glycocalyx. Which of the following is FALSE?
 It will be engulfed more quickly by defensive cells of the host.

Which of the following would NOT be found in the cytoplasm of a bacterial cell?
porins

Bacterial cell walls that are resistant to drying contain
waxes.

Which of the following organelles is responsible for producing most of the ATP in a eukaryotic cell?
mitochondrion

Which of the following have a periplasmic space?
Gram-negative bacteria only

Which of the following statements concerning pili is FALSE?
Pili are longer than fimbriae and flagella.

Which of the following statements about the endoplasmic reticulum (ER) is CORRECT?
The ER is a transport system within the cytoplasm.

Which of the following would contain teichoic acids?
a Gram-positive cell wall

The filament and basal body are associated with which of the following external structures found in some bacterial cell?
flagella

A bacterial cell is placed in distilled water. Which of the following will happen?
The cell will gain water.

Protein synthesis occurs in the
ribosome 

Which of the following molecules is shared by both Gram-positive and Gram-negative organisms?
N-acetylmuramic acid

Amoxicillin is an antibiotic that inhibits the formation of peptide cross-links. Amoxicillin, therefore, would most likely inhibit the growth of __________.
 both Gram-positive and Gram-negative organisms

Porins are present in ______________bacteria because, in these organisms, molecules entering the cell must pass through an extra layer of ___________.
Gram-negative; membrane

Which of the following chemical substances contributes to the unique characteristics of acid-fast bacteria?
mycolic acid

A bacterial cell moving toward light would be an example of
positive phototaxis.

A bacterial cell stains positive with the acid-fast stain. Which of the following is FALSE?
It has a cell wall that contains endotoxin.

Lipid-soluble molecules would be expected to cross the cytoplasmic membrane by which of the following processes?
 diffusion

The cells illustrated in the figure are in a(n) ________ environment.
hypotonic

Cell walls composed of polysaccharide are found in
archaea, bacteria, and eukaryotes.