BIOL 221 Spring 2025 Exam 2 Review

Front

What type of energy is used in photoreactivation repair?

Back

Energy from light is used in photoreactivation repair to fix DNA damage.

Front

Which tube would you use for a Minimum Inhibitory Concentration (MIC) calculation?

Back

Tube 2 is used for MIC calculations.

Front

What is the dilution factor of antibiotic tube 3?

Back

The dilution factor of antibiotic tube 3 is 2.5x10^-2.

Front

If antibiotic Z is bacteriostatic and E. coli growth stops, can E. coli continue growing after dilution?

Back

Yes, if the concentration is lowered sufficiently, E. coli can continue growing.

Front

What is cytosine deamination?

Back

Cytosine deamination is a mechanism by which chemical agents can damage bacterial DNA.

Front

Define bacteriostatic antibiotics.

Back

Bacteriostatic antibiotics inhibit the growth and reproduction of bacteria without killing them.

Front

What is the role of ATP in cellular processes?

Back

ATP serves as the primary energy currency of the cell, providing energy for various biochemical reactions.

Front

Explain the concept of Minimum Inhibitory Concentration (MIC).

Back

MIC is the lowest concentration of an antibiotic that prevents visible growth of a bacterium.

Front

What is the significance of dilution factors in microbiology?

Back

Dilution factors are used to determine the concentration of substances in solutions, crucial for experiments like MIC.

Front

What is the difference between bactericidal and bacteriostatic antibiotics?

Back

Bactericidal antibiotics kill bacteria, while bacteriostatic antibiotics inhibit their growth.