Multiple Choice
Identify the choice that best completes the statement or answers the question.
____ 1. Bacteria and archaea differ in
a.|the presence of a membrane-bound nucleus.|
b.|the makeup of their cell walls.|
c.|size.|
d.|the presence of a cell wall.|
____ 2. Which of the following is NOT found in bacteria?
a.|cell wall|
b.|membrane-bound nucleus|
c.|ribosome|
d.|plasma membrane|
____ 3. Unlike bacteria, archaea
a.|have cell walls.|
b.|are prokaryotes.|
c.|have two plasma membranes.|
d.|are thought to be closely related to eukaryotes.|
____ 4. Bacteria that cause disease are called
a.|viruses.|
b.|pathogens.|
c.|endospores.|
d.|antibiotics.|
____ 5. Where are you likely to find a photoautotroph?
a.|in your refrigerator|
b.|in the darkness of the ocean|
c.|in your digestive system|
d.|near the surfaces of lakes, streams, and oceans|
____ 6. A method called Gram staining is used to tell
a.|what shape a prokaryote has.|
b.|how a prokaryote obtains energy.|
c.|what kind of cell wall a prokaryote has.|
d.|whether a prokaryote has flagella.|
____ 7. Which of the following describes a role of bacteria in the environment?
a.|carrying out photosynthesis|
b.|recycling nutrients|
c.|fixing nitrogen|
d.|all of the above|
____ 8. Which of the following would a physician NOT do to protect against a the spread of a viral disease?
a.|administer a vaccination|
b.|prescribe an antibiotic|
c.|encourage good hygiene|
d.|recommend bed rest to those who become ill|
____ 9. A virus’s DNA or RNA is surrounded by a(n)
a.|protein coat.|
b.|nuclear membrane.|
c.|tail.|
d.|endospore.|
____ 10. Bacteria that break down the nutrients in dead matter into simpler substances that are taken up by plant roots are called
a.|plasmids.|
b.|flagella.|
c.|photoautotrophs.|
d.|decomposers.|
____ 11. Many cases of food poisoning are caused by bacterial