Question 1

All of the following are located on the exterior surface of a prokaryote EXCEPT
A) flagellum
B) pilus
C) plasma membrane
D) capsule
E) none of these

Accepted Answer

The plasma membrane is a component of the cell's interior and is not located on the exterior surface of a prokaryote. The other options listed – flagellum, pilus, and capsule – are all located on the exterior surface.

Question 2

MATCHING
Classification.Answer the following questions using the five groups listed below:
a.halophiles
b.cyanobacteria
c.thermophiles
d.proteobacteria
e.methanogens
-These bacteria live in temperatures that are not usually conducive to life.

Accepted Answer

Thermophiles are bacteria that live in extreme temperatures, usually above 45°C, which are not conducive to most other living organisms.

Answer: E
 Methanogens are bacteria that are able to survive in harsh living conditions, including environments with high levels of methane and low oxygen.

Answer: A and C
 Halophiles are bacteria that are able to survive in high salt concentrations, while thermophiles live in extreme temperatures.

Answer: D
 Proteobacteria are a diverse group of bacteria that have adapted to survive in many different environments, including those that are not conducive to life.

Answer: B and C
 Cyanobacteria are bacteria that are able to perform photosynthesis and are found in a wide range of environments, including extreme temperatures.

Question 3

Which of the following statements is true of the proteobacteria?
A) They are the most diverse group of bacteria.
B) Some are photoautotrophs.
C) Some are chemoautotrophs.
D) Some are chemoheterotrophs.
E) All of these are true.

Accepted Answer

All of these statements are true of the proteobacteria. They are the largest and most diverse group of bacteria, containing a wide range of metabolic strategies including photoautotrophs, chemoautotrophs, and chemoheterotrophs.

Question 4

Which of the following is an intracellular parasite that causes sexually transmitted disease?
A) Chlamydia
B) Cyanobacteria
C) Clostridium
D) Chondromyces
E) all of these

Accepted Answer

Chlamydia is an intracellular parasite that causes sexually transmitted diseases such as chlamydia, which can infect the urethra, cervix, and rectum. Cyanobacteria, Clostridium, and Chondromyces are not intracellular parasites and do not necessarily cause sexually transmitted diseases.

Question 5

Endospores can resist
A) boiling water.
B) acids.
C) irradiation.
D) disinfectants.
E) all of these.

Accepted Answer

Endospores are highly resistant to various environmental stressors like high temperature, lack of nutrients, disinfectants, acids and bases, radiation, and desiccation.

Question 6

Archaeans are similar to bacteria in all of the following ways EXCEPT
A) size.
B) shape.
C) plasma membrane composition.
D) absence of a nucleus.
E) mode of cellular division.

Accepted Answer

Archaeans differ from bacteria in their plasma membrane composition, as archaeans have unique lipids that are ether-linked, whereas bacteria have ester-linked lipids.

Question 7

A dangerous form of food poisoning is caused by
A) Clostridium botulinum.
B) Clostridium tetani.
C) Bacillus anthracis.
D) Heliobacter pylori.
E) Thermus aquaticus.

Accepted Answer

Clostridium botulinum can cause botulism, a form of food poisoning that can be life-threatening.

Question 8

In what way does prokaryotic fission resemble eukaryotic mitosis?
A) mechanism of chromosome movement
B) genetically equivalent daughter cells are produced
C) chromosome attachment
D) production of a cytoskeletal framework for separating chromosomes
E) all of these

Accepted Answer

Both prokaryotic fission and eukaryotic mitosis produce genetically equivalent daughter cells. While there may be differences in the mechanisms of chromosome movement and attachment, and the presence of a cytoskeletal framework, these differences do not provide as strong of a similarity as the production of genetically equivalent daughter cells.

Question 9

Most species of Gram-positive bacteria are
A) photoautotrophic.
B) photoheterotrophic.
C) chemoautotrophic.
D) chemoheterotrophic.
E) photochemoautotrophic.

Accepted Answer

Most bacteria, including Gram-positive bacteria, are chemoheterotrophic, meaning they obtain energy and carbon from organic molecules. Photoautotrophic, photoheterotrophic, and photochemoautotrophic organisms use light as their source of energy, while chemoautotrophic organisms obtain their energy from inorganic sources.

Question 10

In which of the following ways are archaeans similar to eukaryotic cells?
A) size
B) shape
C) presence of histones
D) DNA polymerases
E) presence of operons

Accepted Answer

The answer of In which of the following ways are...

Question 11

Pili may do all of the following EXCEPT
A) help cells attach to surfaces.
B) function in reproduction.
C) extend from the cell surface.
D) be transferred between cells.
E) function in cell locomotion.

Accepted Answer

The answer of Pili may do all of the following...

Question 12

Bacteriorhodopsin is a light-sensitive pigment found in ____ archaeans and used to supply energy for ____ production.
A) halophilic; ATP
B) thermophilic; carbohydrate
C) methanogenic; methane
D) halophilic; carbohydrate
E) thermophilic; ATP

Accepted Answer

Bacteriorhodopsin is found in halophilic (salt-loving) archaeans and is used to convert light energy into chemical energy, specifically for ATP production.

Question 13

The methanogenic archaeans are ____ that pull electrons from ____.
A) chemoautotrophs; oxygen
B) chemoheterotrophs; carbon dioxide
C) chemoautotrophs; water
D) chemoheterotrophs; methane
E) chemoautotrophs; hydrogen gas

Accepted Answer

Methanogenic archaeans are chemoautotrophs, meaning they derive energy from chemical reactions and are able to produce their own organic matter from inorganic sources. They pull electrons from hydrogen gas (H2), which they use to reduce carbon dioxide (CO2) to methane (CH4) in a process known as methanogenesis.

Question 14

Gram-positive bacteria have ____ and appear ____ under the microscope.
A) thick walls; pink
B) thick walls; purple
C) thin walls; pink
D) thin walls; purple
E) none of these

Accepted Answer

Gram-positive bacteria have thick cell walls that contain a lot of peptidoglycan, which retains the crystal violet stain used in Gram staining. This causes them to appear purple under the microscope.

Question 15

Gram staining divides bacteria into ____ groups based on differences in the composition of their ____.
A) two; DNA
B) four; capsules
C) two; cell walls
D) four; cell walls
E) two; plasma membranes

Accepted Answer

Gram staining divides bacteria into two groups based on differences in the composition of their cell walls.

Question 16

Which of the following is NOT true about cyanobacteria?
A) Cyanobacteria have the same light-capturing chlorophylls as plants.
B) Chloroplasts evolved from ancient cyanobacteria.
C) Cyanobacteria can fix carbon.
D) Cyanobacteria can fix nitrogen.
E) Cyanobacteria put nearly all of the nitrogen into Earth's atmosphere.

Accepted Answer

Cyanobacteria are known for their ability to fix nitrogen, which means they convert nitrogen gas from the atmosphere into a usable form for other organisms. However, it is not true that cyanobacteria put nearly all of the nitrogen into Earth's atmosphere. Nitrogen gas makes up about 78% of Earth's atmosphere and has been present for billions of years, while cyanobacteria have only been around for a fraction of that time. Cyanobacteria are responsible for contributing some nitrogen to the atmosphere, but they are not the sole source.

Question 17

The methanogenic archaeans belong are ____.
A) aerobes
B) facultative anaerobes
C) strict aerobes
D) facultative anaerobes.
E) strict anaerobes

Accepted Answer

The methanogenic archaeans belong to strict anaerobes because they can only survive in environments without oxygen. They use carbon dioxide, hydrogen, and organic compounds to produce methane gas through anaerobic respiration.

Question 18

MATCHING Classification.Answer the following questions using the five groups listed below: a.halophiles b.cyanobacteria c.thermophiles d.proteobacteria e.methanogens -These produce CH₄.

Accepted Answer

The answer of MATCHING
Classification.Answer the following questions using the five...

Question 19

MATCHING
Classification.Answer the following questions using the five groups listed below:
a.halophiles
b.cyanobacteria
c.thermophiles
d.proteobacteria
e.methanogens
-These bacteria can live in water of very high salt concentration.

Accepted Answer

Only halophiles are known for their ability to survive in high salt concentrations. Cyanobacteria, thermophiles, proteobacteria, and methanogens do not exhibit this characteristic.

Question 20

Plasmids
A) are self-replicating circular molecules of DNA.
B) may be transferred between bacteria.
C) may pick up genes from other prokaryotes.
D) contains genes separate from the bacterial chromosome.
E) fit all of these descriptions.

Accepted Answer

Plasmids are self-replicating circular molecules of DNA that may be transferred between bacteria and may pick up genes from other prokaryotes. They also contain genes that are separate from the bacterial chromosome. Therefore, all of the given choices are applicable to plasmids.

Quiz 20: Viruses and Prokaryotes

All of the following are located on the exterior surface of a prokaryote EXCEPT

MATCHING Classification.Answer the following questions using the five groups listed below: a.halophiles b.cyanobacteria c.thermophiles d.proteobacteria e.methanogens -These bacteria live in temperatures that are not usually conducive to life.

Which of the following statements is true of the proteobacteria?

Which of the following is an intracellular parasite that causes sexually transmitted disease?

Endospores can resist

Archaeans are similar to bacteria in all of the following ways EXCEPT

A dangerous form of food poisoning is caused by

In what way does prokaryotic fission resemble eukaryotic mitosis?

Most species of Gram-positive bacteria are

In which of the following ways are archaeans similar to eukaryotic cells?

Pili may do all of the following EXCEPT

Bacteriorhodopsin is a light-sensitive pigment found in archaeans and used to supply energy for production.

The methanogenic archaeans are that pull electrons from .

Gram-positive bacteria have and appear under the microscope.

Gram staining divides bacteria into groups based on differences in the composition of their .

Which of the following is NOT true about cyanobacteria?

The methanogenic archaeans belong are ____.

MATCHING Classification.Answer the following questions using the five groups listed below: a.halophiles b.cyanobacteria c.thermophiles d.proteobacteria e.methanogens -These produce CH₄.

MATCHING Classification.Answer the following questions using the five groups listed below: a.halophiles b.cyanobacteria c.thermophiles d.proteobacteria e.methanogens -These bacteria can live in water of very high salt concentration.

Plasmids

Quiz 20: Viruses and Prokaryotes

All of the following are located on the exterior surface of a prokaryote EXCEPT

MATCHING Classification.Answer the following questions using the five groups listed below: a.halophiles b.cyanobacteria c.thermophiles d.proteobacteria e.methanogens -These bacteria live in temperatures that are not usually conducive to life.

Which of the following statements is true of the proteobacteria?

Which of the following is an intracellular parasite that causes sexually transmitted disease?

Endospores can resist

Archaeans are similar to bacteria in all of the following ways EXCEPT

A dangerous form of food poisoning is caused by

In what way does prokaryotic fission resemble eukaryotic mitosis?

Most species of Gram-positive bacteria are

In which of the following ways are archaeans similar to eukaryotic cells?

Pili may do all of the following EXCEPT

Bacteriorhodopsin is a light-sensitive pigment found in ____ archaeans and used to supply energy for ____ production.

The methanogenic archaeans are ____ that pull electrons from ____.

Gram-positive bacteria have ____ and appear ____ under the microscope.

Gram staining divides bacteria into ____ groups based on differences in the composition of their ____.

Which of the following is NOT true about cyanobacteria?

The methanogenic archaeans belong are ____.

MATCHING Classification.Answer the following questions using the five groups listed below: a.halophiles b.cyanobacteria c.thermophiles d.proteobacteria e.methanogens -These produce CH4.

MATCHING Classification.Answer the following questions using the five groups listed below: a.halophiles b.cyanobacteria c.thermophiles d.proteobacteria e.methanogens -These bacteria can live in water of very high salt concentration.

Plasmids

Bacteriorhodopsin is a light-sensitive pigment found in archaeans and used to supply energy for production.

The methanogenic archaeans are that pull electrons from .

Gram-positive bacteria have and appear under the microscope.

Gram staining divides bacteria into groups based on differences in the composition of their .

MATCHING Classification.Answer the following questions using the five groups listed below: a.halophiles b.cyanobacteria c.thermophiles d.proteobacteria e.methanogens -These produce CH₄.