USF BSC 2011L Biodiversity Lab Midterm Questions and Answers
with Verified Solutions | Latest Update
QUESTION
Archaea
Answer:
Domain of unicellular prokaryotes that have cell walls that do not contain peptidoglycan; many
are extremophiles
QUESTION
Bacteria
Answer:
single-celled organisms that lack a nucleus; prokaryotes; cell walls made of peptidoglycan
QUESTION
Eukaryote
Answer:
A cell that contains a nucleus and membrane-bound organelles
QUESTION
Extremophiles
Answer:
organisms that live in extreme environments
QUESTION
peptidoglycan
Answer:
A type of polymer in bacterial cell walls consisting of modified sugars cross-linked by short
polypeptides.
QUESTION
Two Types of Bacteria
Answer:
gram positive and gram negative
,QUESTION
Gram staining
Answer:
A process by which components of bacterial cell walls are bound to Gram's stain. Depending on
the amount of peptidoglycan in their cell walls, bacteria stain differently and are classified as
Gram-negative or Gram-positive.
QUESTION
Gram-positive bacteria
Answer:
Bacteria that have a thick peptidoglycan cell wall, and no outer membrane. They stain very darkly
(purple) in Gram stain.
QUESTION
Gram-negative bacteria
Answer:
Bacteria that have a thin peptidoglycan cell wall covered by an outer plasma membrane. They
stain very lightly (pink) in Gram stain. Gram-negative bacteria are typically more resistant to
antibiotics than Gram-positive bacteria.
QUESTION
What type of stain is a gram stain?
Answer:
a differential stain
QUESTION
Bacterial shapes
Answer:
coccus, vibrio, bacillus, spirillum
QUESTION
Coccus
Answer:
A spherical bacterium.
, QUESTION
Vibrio
Answer:
comma shaped bacterium
QUESTION
Bacillus
Answer:
Rod shaped bacteria
QUESTION
Spirillium
Answer:
spiral shaped bacteria
QUESTION
Rhodospirillum rubrum
Answer:
rigid, spiral negative photosynthetic organism; non-pathogenic
QUESTION
Cyanobacteria
Answer:
Photosynthetic, oxygen-producing bacteria, primary endosymbionts (formerly known as
blue-green algae).
QUESTION
Pigments contained in cyanobacteria
Answer:
Chlorophyll a (green), phycocyanin (blue), phycoerythrin (red)
QUESTION
mucilagenous sheath
Answer:
jellylike layer often surrounding cyanobacteria
with Verified Solutions | Latest Update
QUESTION
Archaea
Answer:
Domain of unicellular prokaryotes that have cell walls that do not contain peptidoglycan; many
are extremophiles
QUESTION
Bacteria
Answer:
single-celled organisms that lack a nucleus; prokaryotes; cell walls made of peptidoglycan
QUESTION
Eukaryote
Answer:
A cell that contains a nucleus and membrane-bound organelles
QUESTION
Extremophiles
Answer:
organisms that live in extreme environments
QUESTION
peptidoglycan
Answer:
A type of polymer in bacterial cell walls consisting of modified sugars cross-linked by short
polypeptides.
QUESTION
Two Types of Bacteria
Answer:
gram positive and gram negative
,QUESTION
Gram staining
Answer:
A process by which components of bacterial cell walls are bound to Gram's stain. Depending on
the amount of peptidoglycan in their cell walls, bacteria stain differently and are classified as
Gram-negative or Gram-positive.
QUESTION
Gram-positive bacteria
Answer:
Bacteria that have a thick peptidoglycan cell wall, and no outer membrane. They stain very darkly
(purple) in Gram stain.
QUESTION
Gram-negative bacteria
Answer:
Bacteria that have a thin peptidoglycan cell wall covered by an outer plasma membrane. They
stain very lightly (pink) in Gram stain. Gram-negative bacteria are typically more resistant to
antibiotics than Gram-positive bacteria.
QUESTION
What type of stain is a gram stain?
Answer:
a differential stain
QUESTION
Bacterial shapes
Answer:
coccus, vibrio, bacillus, spirillum
QUESTION
Coccus
Answer:
A spherical bacterium.
, QUESTION
Vibrio
Answer:
comma shaped bacterium
QUESTION
Bacillus
Answer:
Rod shaped bacteria
QUESTION
Spirillium
Answer:
spiral shaped bacteria
QUESTION
Rhodospirillum rubrum
Answer:
rigid, spiral negative photosynthetic organism; non-pathogenic
QUESTION
Cyanobacteria
Answer:
Photosynthetic, oxygen-producing bacteria, primary endosymbionts (formerly known as
blue-green algae).
QUESTION
Pigments contained in cyanobacteria
Answer:
Chlorophyll a (green), phycocyanin (blue), phycoerythrin (red)
QUESTION
mucilagenous sheath
Answer:
jellylike layer often surrounding cyanobacteria
