Question

Why must most antibiotics be given some time to take effect on a disease-causing population of bacteria?

Answer 1

The correct answer is d. "Regeneration" means "forming new cells," and signifies that the disease-causing bacteria cells are multiplying. When there are more of these cells, there is a higher chance for antibiotic resistance (making it take longer for the antibiotics to work). Once there is a smaller concentration of these bacterial cells, the antibiotics become more effective. 

Answer 2

Answer:

The correct answer will be option-B

Explanation:

Antibiotic is the antimicrobial substance which inhibits the growth of the bacteria by interfering with different process and destroying the cell wall.

If the same antibiotic is used for the same colony of bacteria then bacteria can respond by becoming resistance to the antibiotic and as a result of this, the antibiotic becomes ineffective for the bacteria.

Since bacteria live for only a few days, therefore, the disease-causing bacteria dies off after a few days. The antibiotic then acts on the susceptible bacteria and kill the bacteria.

Thus, Option-B is the correct answer.