Questions from the Metabolism Video
Answers

1. This video begins with a microscopic view of a growing colony of bacteria. What shape are the bacteria?

2. Write definitions of the following terms as you watch the video:

a. Anabolism.
b. Catabolism.
c. Chemolithotrophy.
d. Fermentation.
e. Photosynthesis.
f. Respiration.

3. The source of energy for primary producers such as plants and photosynthetic bacteria is light. What are the primary producers in a deep sea food chain? What do these organisms use for an energy source?

4. Why do yeast make beer?

5. Fill in this graph to show a typical bacterial growth curve. Label the lag, logarithmic, stationary, and death phases. What is happening in each phase?

6. What is happening in each of these places in a sewage treatment plant? Which steps require air (O₂)? Where does the effluent go at #1? Where does the waste go at #2?

7. Why does this video include a study of sewage treatment and beer-making?

8. What happens if Emerson has a different yeast in his fermentation vats? What if Acetobacter is present?