The pink color in the top of the broth in an FTM tube indicates

• the presence of oxygen
• the presence of carbon dioxide
• the presence of thioglycolate
• the absence of oxygen

• the presence of oxygen

Label these FTM tubes to demonstrate your understanding of the growth patterns of different organisms based on their metabolic need for or sensitivity to oxygen.

• capnophilic
• facultative
• fermentor
• microaerophilic
• anaerobic
• aerobic

1. Aerobic
2. Microaerophilic
3. Facultative
4. Anaerobic

Taq polymerase is a DNA polymerase enzyme that demonstrates maximal activity at 72°C. The organism from which this enzyme was isolated would most likely be classified as a

• mesophile
• psychrophile
• psychrotroph
• hyperthermophile
• thermophile

• thermophile

Both human pathogens and normal microbiota are typically classified as

• mesophiles
• psychrophiles
• thermophiles
• hyperthermophiles

• mesophiles

Please label the image to test your understanding of temperature adaptations exhibited by two various bacteria.

• Minimum
• Optimum
• Thermophile
• Maximum
• Psychrophile
• Mesophile

1. Minimum
2. Optimum
3. Maximum
4. Psychrophile
5. Mesophile
6. Thermophile

Which parts of a cell are affected by temperature?

• DNA
• enzymes
• RNA
• membrane fluidity
• ribosomes

• enzymes
• membrane fluidity
• ribosomes

Match the description with the term to demonstrate your understanding of temperature classifications

1. These organisms are likely to inhabit a compost pile that is actively composting.
2. The bacteria that grow in and on the human body are in this group.
3. These organisms might grow in the superheated water near hydrothermal vents in the ocean floor
4. These organisms might be isolated from water pools on the surface of a glacier.

• psychrophile
• thermophile
• mesophile
• hyperthermophile

1. thermophile
2. mesophile
3. hyperthermophile
4. psychrophile

______ optimum growth temperature: −5°C–20°C

______ optimum growth temperature: 20°C–50°C

______ optimum growth temperature: 50°C–80°C

______ optimum growth temperature: 80°C– >100°C

• thermophile
• psychrophile
• hyperthermophile
• mesophile

1. psychrophile
2. mesophile
3. thermophile
4. hyperthermophile