Question

question 5 (1 point) the main purpose of performing a serial dilution is: to reduce the concentration of microorganisms to a countable level to completely kill bacteria to speed up bacterial growth to sterilize the sample question 6 (bonus) (1 point) why do we use sterile diluent (like sterile water) in a serial dilution? to prevent oxygen from reaching the cells to feed the bacteria and make them grow faster to evenly disperse bacteria without contamination to make the colonies change color

Explanation:

Serial dilution is a technique used in microbiology to reduce the concentration of microorganisms in a sample to a countable level for easier analysis and enumeration. Using sterile diluents like sterile water helps maintain the integrity of the experiment by preventing contamination from external sources.

Answer:

Question 5: To reduce the concentration of microorganisms to a countable level
Question 6: To prevent oxygen from reaching the cells and to prevent contamination