Question | Answer |
Cocci | spheres |
Cocci in clusters | spheres clustered together |
Cocci in chains | spheres linked together in chain-like arrangements |
Bacilli | rod-shaped |
Spirals | spiral shaped |
A gram-positive cocci | Streptococcus |
A gram-positive bacillus | Bacillus or Clostridium |
A gram-negative cocci | Neisseria gonorrhea |
A gram-negative bacillus | Escherichia coli |
A spore-forming organism | Bacillus or Clostridium |
An acid-fast organism | Mycobacterium |
How would you identify the mold Aspergillus? | wooly, green; conidiospores |
How would you identify the mold Penicillium? | powdery, dark green; conidiospores |
How would you identify the mold Rhizopus? | cottony, black spores; sporangiospores |
Example of a genus name of yeast | Candida |
Explain why we use Sabouraud Dextrose Agar to grow fungi. | Because fungi grows at a lower pH than most organisms |
Transformation | Bacteria take free or “naked” DNA from the environment and are able to translate and express that DNA for their own purposes |
Explain the use of a candle jar. | Plates are put in a jar along with a candle;lid is sealed. As flame burns, O decreases and the flame goes out. Oxygen is present, but at a lower percentage than in the atmosphere. The concentration of carbon dioxide increases as a result of the flame. |
Facultative Anaerobic organisms | Grows in oxygen, in candle jar, and in GasPak |
Obligate Anaerobic organisms | Grows only in GasPak |
Microaerophilic organisms | Grows best in the candle jar; grows right at the point where the oxygen level is diminishing in the thioglycollate broth |