Quiz

QUIZ

1. From what source do carbon-fixing bacteria get their organic carbon from?

a. Carbohydrates b. Protein c. Carbon dioxide d. Hydrocarbons

Answer: c. Carbon-fixing bacteria can make use of the carbon found in carbon dioxide in order to make organic carbon-containing molecules.

2. What does the rhizobium species of bacteria make out of the nitrogen in the air?

a. Proteins b. Ammonia c. Amino acids d. Small peptides

Answer: b. Rhizobium can fix the nitrogen from the air so that they can make ammonia that is further turned into higher-order nitrogenous compounds by plant species the bacteria live near.

3. The phylum of protobacteria are actually subtypes of what kind of bacterium?

a. Gram positive bacteria b. Gram negative bacteria c. Deeply branching bacteria d. Atypical bacteria

Answer: b. Protobacteria are a phylum that represents some types of gram-negative bacteria.

4. Which organism is an obligate intracellular pathogen that leads to Rocky

Mountain spotted fever?

a. Chlamydia b. Clostridium c. Bordetella d. Rickettsia

Answer: d. Rickettsia is the genus of an organism that is an obligate intracellular pathogen because it cannot make its own ATP energy. One species of Rickettsia leads to Rocky Mountain spotted fever.

5. Which type of proteobacteria include myxobacteria that can make metabolically inactive myxospores as part of their life cycle?

a. Alpha-proteobacteria b. Beta-proteobacteria c. Gamma-proteobacteria d. Delta-proteobacteria

Answer: d. Delta-proteobacteria are a small group of proteobacteria that include myxobacteria, which can make metabolically inactive myxospores when necessary.

6. Which type of proteobacteria include campylobacter and helicobacter, both of which cause gastrointestinal diseases in humans?

a. Beta-proteobacteria b. Gamma-proteobacteria c. Delta-proteobacteria d. Epsilon-proteobacteria

Answer: d. The classification of epsilon-proteobacteria is small but includes both campylobacter and helicobacter species, which lead to certain types of gastrointestinal disorders.

7. Which gram-negative organism reproduces via budding rather than through binary fission?

a. Planctomycetes b. Borrelia c. Spirochetes d. Fusobacterium

Answer: a. The organisms of the Planctomycetes classification are unique because they reproduce through budding rather than through binary fission like other bacteria.

8. What is a characteristic feature of phototrophic bacteria?

a. They contain chlorophyll b. They live in aquatic environments c. They make oxygen d. They get their energy from the sun

Answer: d. The defining feature of phototrophic bacteria is that they all participate in some form of photosynthesis and get their energy from the sun.

9. What disease is least likely to be caused by a species in the genus Clostridium?

a. Botulism b. Pseudomembranous colitis c. Gas gangrene d. Pneumonia

Answer: d. Each of these diseases is specifically caused by a member of the genus Clostridium, except that there aren’t any of these that cause pneumonia.

10. What is the most similar aspect that define both archaea and bacterial organisms?

a. They have similar cell walls b. They are both unicellular c. They have similar cell membranes d. They have similar genomes

Answer: b. Each of these is a big difference between bacteria and archaea except that both types of organisms are considered unicellular.