Microbiology: Bacteria and View Feedback

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Question 1| | 1 / 1 point|
Microbes are not responsible for ________.
| | synthesis of acetone and alcohol |
| | breaking down wastes |
| | synthesis of vitamins |
| | antibody production |
| | oxygen generation via photosynthesis |
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| Correct!|

Question 2| | 1 / 1 point|
The cell theory states that ________ are made up of cells.
| | protozoa |
| | archaea |
| | plants |
| | all living things |
| | animals |
Question 3| | 1 / 1 point|
In Pasteur's swan-neck flask experiment, the importance of the S-shaped curves in the flasks was twofold. The curves allowed entry of air, and yet excluded ________. | | oxygen |
| | nutrients |
| | airborne bacteria|
| | broth |
| | heat |
Question 4| | 1 / 1 point|
Pasteurization was first developed to kill ________ in wine. | | endospore-producing bacteria |
| | all bacteria |
| | disease-causing bacteria |
| | antibiotic-producing bacteria |
| | spoilage bacteria |
Question 5| | 1 / 1 point|
Robert Koch's studies on Bacillus anthracis established a sequence of experimental steps to prove that microbes ________. | | can be altered to produce products such as human insulin | | | degrade toxic wastes|

| | control insect pests |
| | recycle elements such as nitrogen |
| | cause disease |
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| Correct!|

Question 6| | 1 / 1 point|
An exposure to ________ protects against infection with smallpox. | | antibody |
| | chemotherapy |
| | penicillin |
| | normal microbiota |
| | cowpox |
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| Correct!|

Question 7| | 1 / 1 point|
Ehrlich searched for a/an ________. This is a chemical that would hunt down and destroy a pathogen without harming the infected host. | | animalcule |
| | vital force |
| | vaccine |
| | magic bullet |
| | pathogen |
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| Correct!|

Question 8| | 1 / 1 point|
How would you recognize an antibiotic-producing soil bacterium on a plate crowded with other bacteria? The bacterial colony producing the antibiotic would be ________. | | characterized by pseudopods |

| | surrounded by a clear area |
| | visible as masses called mycelia |
| | pigmented |
| | star-shaped |
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| Correct!|

Question 9| | 1 / 1 point|
The usefulness of antibiotics is hampered by ________.
| | the emergence of antibiotic-resistant bacteria |
| | the limited types of antibiotic available |
| | their inability to kill specific bacteria |
| | difficulties encountered in mass production |
| | an antibiotic's lack of specificity for bacterial versus animal cells | View Feedback|
| Correct!|

Question 10| | 1 / 1 point|
All life can be classified into three domains ________.
| | Eukaryotes, Prokaryotes, Viruses |
| | Bacteria, Archaea, Eukarya |
| | Carnivores, Herbivores, Omnivores |
| | Animalae, Plantae, Microbes |
| | Bacteria, Fungi, Protozoa |
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| Correct!|

Question 11| | 1 / 1 point|
Which of the following is characteristic of bacteria?
| | Bacteria have DNA or RNA, but not both. |
| | Bacteria reproduce by a cell division process known as mitosis. | | | Bacteria live in extreme environments, including pH, temperature, and pressure extremes.| | | Bacteria lack a membrane-bound nucleus. |

| | Bacteria have cellulose or chitin in their cell walls.| Question 12| | 1 / 1 point|
All of the following are eukaryotes except ________.
| | bacteria|
| | fungi |
| | helminths |
| | algae|
| | protozoa|
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| Correct!|

Question 13| | 1 / 1 point|
A new microorganism has been isolated from hot springs in Yellowstone National Park. It consists of single cells, which appear to lack a nucleus. Chemical analysis...
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