Which term can be used to describe the majority of protists?

a. aerobic
b. photosynthetic
c. anaerobic
d. autotrophic


Ans: a. aerobic

Biology & Microbiology

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The Km for enzyme Q is 1 × 10-6 M. Q catalyzes the reaction R?S at a velocity of 30 µmole/min when the concentration of substrate is 0.02 M; hence, Vmax is approximately 30 µmole/min

Assuming Michaelis-Menten kinetics is followed, what will the reaction velocity be when [S] is 10-7 M? A. 30 µmole/min B 3.0 × 10-7 µmole/min C. 2.7 µmole/min D. 2.7 × 10-12 µmole/min E. 0.27 µmole/min

Biology & Microbiology

What is a key characteristic of enzyme behavior?

A. Enzyme shape is stable during catalysis. B. The active site of an enzyme orients its substrate molecules, thereby promoting interaction of their reactive parts. C. All enzymes have an active site where coenzymes are temporarily bound. D. Each enzyme can catalyze multiple types of reactions. E. Enzyme activity is not affected by pH and temperature.

Biology & Microbiology

The first group to undergo mitosis was the _____________.

a. plants b. bacteria. c. protists d. fungi

Biology & Microbiology

A novel disease causes destruction of the adrenal glands. If a patient with this disease failed to receive aldosterone replacement therapy, what would result?

A. Death B. Infertility in both men and women C. Poor blood sugar regulation D. Diminished cognitive function

Biology & Microbiology