Microbiology

Microbiology Study Guide

118. All of the following are true about protozoa except: a. They have rigid cell walls b. They are all unicellular c. They are all eukaryotic d. None of the above

119. An enzyme produced in response to the presence of a substrate is called a/an _________________. a. 120. Which of the following is not something heterotrophs can use as carbon sources? a. Methane b. CO2 c. Carbohydrates d. Proteins 121. Gram-negative cell walls are sensitive to penicillin. a. True b. False 122. Choose the mismatched organism and energy source. a. Chemoheterotroph; glucose b. Operator b. Promotor c. Inducible enzyme d. Repressible enzyme

Chemoautotroph; NH3 c. Photoheterotroph; light d. Photoautotroph; CO2

123. To what kind of organism does the term “facultative anaerobe” refer? a. One that requires less oxygen than is present in air b. One that does not use oxygen c. One that uses oxygen or grows without oxygen d. A and C only

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