Question: Why is it difficult to group bacteria into species?
Answer Choices:
Bacterial cells can accept genetic material from other, sometimes unrelated cells.
Bacteria are not alive and are not cells.
Bacteria can hybridize, thus making the definition of a species difficult or impossible.
Bacteria can alter their genetic makeup.
Bacteria do not use a typical mode of sexual reproduction
Answer: Bacterial cells can accept genetic material from other, sometimes unrelated cells; Bacteria can alter their genetic makeup; Bacteria do not use a typical mode of sexual reproduction
Question: Bergey’s Manual of _____ Bacteriology is used by microbiologists whose primary interest is identification of prokaryotes, while Bergey’s Manual of _____ Bacteriology is used by those who are also interested in the evolutionary relationships of prokaryotes.
Answer Choices:
Determinative/Systematic
Systematic/Determinative
Answer: Determinative/Systematic
Question: To ensure that food is sterile and free from viable bacteria, including endospores, _____ is used in food processing.
Answer Choices:
incineration
steam pressurization
desiccation
ordinary boiling
Answer: steam pressurization
Question: Which two of the following cellular features are different between bacteria and archaea?
Answer Choices:
type of genetic material
presence of a cytoskeleton
semipermeable cytoplasmic membrane
peptidoglycan in cell wall
method of DNA compaction
Answer: presence of a cytoskeleton, peptidoglycan in cell wall
Question: The bacterial cell structure indicated by the arrow is a(n) _____
Answer Choices:
membrane
chromosome
spore coat
endospore
Answer: endospore
Question: Because endospores are resistant to ordinary methods of cleaning and food preparation, food must be exposed to _____ to ensure sterility.
Answer Choices:
pressurized steam
incineration
boiling
desiccation
Answer: pressurized steam
Question: In this image, the arrow is pointing to the center of a structure that is termed a(n) _____
Answer Choices:
(No answer options provided)
Answer: endospore
Question: Members of domain archaea and domain bacteria have a similar method of DNA compaction.
Answer Choices:
True
False
Answer: True
Question: Which three of the following cellular features are the same in bacteria and archaea?
Answer Choices:
peptidoglycan in cell wall
identical rRNA sequences
method of DNA compaction
presence of a cytoskeleton
type of genetic material
semipermeable cytoplasmic membrane
Answer: method of DNA compaction, type of genetic material, semipermeable cytoplasmic membrane
Question: Archaea that are adapted to growth at very low temperatures are called _____
Answer Choices:
hyperthermophilic
halophilic
psychrophilic
methanogens
Answer: psychrophilic
Question: Archaea are:
Answer Choices:
the youngest life forms.
often able to exist in extreme environments.
only found in the environment, not human tissue.
more closely related to the Eukarya than the Bacteria.
Answer: often able to exist in extreme environments, more closely related to the Eukarya than the Bacteria.
Question: When comparing domain Archaea to domain Bacteria, members of the domain — have peptidoglycan in their cell walls, whereas members of the domain — have unique cell wall composition.
Answer Choices:
(No answer options provided)
Answer: Bacteria; Archaea
Question: Members of domain archaea and domain bacteria have a similar method of DNA compaction.
Answer Choices:
True
False
Answer: True
Question: Choose the characteristic that is true for archaea but not bacteria.
Answer Choices:
Contain peptidoglycan in cell walls
Similar ribosome structure to eukaryotes
Possess circular chromosomes
Answer: Similar ribosome structure to eukaryotes
Question: Where are the bacterial ribosomes located?
Answer Choices:
attached to the cytoplasmic membrane
in the cytoplasm
in the periplasm
attached to the outer membrane
Answer: attached to the cytoplasmic membrane, in the cytoplasm
Question: Which three of the following cellular features are the same in bacteria and archaea?
Answer Choices:
identical rRNA sequences
type of genetic material
semipermeable cytoplasmic membrane
method of DNA compaction
peptidoglycan in cell wall
presence of a cytoskeleton
Answer: type of genetic material, semipermeable cytoplasmic membrane, method of DNA compaction
Question: Depletion of nutrients like carbon and nitrogen can result in the formation of _____ in some bacteria.
Answer Choices:
(No answer options provided)
Answer: endospores
Question: Identify the three advantages of endospore formation.
Answer Choices:
(No answer options provided)
Answer: protection in dry conditions, resistance to antimicrobials, resistance to radiation/heat