Enzymes Practice Problems

Which enzyme is used by bacteria to acquire atmospheric nitrogen:

Which enzyme catalyzes the dismutation of superoxide radicals into oxygen and hydrogen peroxide?

To survive the presence of toxic superoxide radicals, the aerobic bacteria, facultative anaerobes, and aerotolerant anaerobes must synthesize which of the following enzymes?

Suppose you want to evaluate the lactose metabolism capability of E. coli. To assess this, you experiment by inoculating E. coli into a flask containing lactose and allowing it to incubate for several hours. If the bacteria were able to metabolize the lactose successfully, what enzyme(s) might you expect to detect in the flask after the incubation period?

Suppose a particular bacterium has induced a widespread infection within the saltwater fish population. Based on the provided traits, identify the appropriate bacterial species.

I. Gram-positive

II. Rod-shaped

III. Non-acid fast

IV. Produces H₂S gas

Catalase is an enzyme found in living cells, particularly in aerobic organisms such as bacteria, fungi, plants, and animals. It protects cells from damage caused by:

Which of the following does not directly influence enzyme activity?

Which statement accurately describes the function of ribozymes?

During metabolic processes in the liver, alanine (an amino acid) transfers its amino group to alpha-ketoglutarate, forming pyruvate and glutamate as products. Which biochemical reaction describes this process?

Which of the following enzymes is not directly involved in anabolic reactions that synthesize complex carbohydrates?

Why are vitamins considered crucial for the metabolic processes of bacteria?