Bacterial Growth and Antibiotic Effects

The video tutorial explains how to calculate the number of bacteria remaining after antibiotic doses. Starting with 1 million bacteria, 99.9% are killed by the first dose. The surviving bacteria double every 20 minutes. The tutorial guides through calculating bacteria growth and reduction over 24 hours with doses every 4 hours, emphasizing the importance of understanding bacterial growth rates and antibiotic effects.

What percentage of the initial 1 million bacteria is killed by the first antibiotic dose?

• 100%

• 99.9%

• 99%

• 90%

How often do the bacteria double in number?

• Every 10 minutes

• Every 20 minutes

• Every 30 minutes

• Every 40 minutes

How frequently is the antibiotic administered?

• Every 3 hours

• Every 5 hours

• Every 2 hours

• Every 4 hours

What is the remaining percentage of bacteria after the first antibiotic dose?

• 0.01%

• 0.1%

• 10%

• 1%

If 1% of bacteria survive, how many bacteria are left after the first dose?

• 10

• 10,000

• 100

• 1,000

How many times do the bacteria double in one hour?

• Twice

• Once

• Four times

• Three times

What is the bacteria count after 1 hour if starting with 100 bacteria?

• 600

• 800

• 400

• 200

What is the bacteria count after 2 hours if starting with 100 bacteria?

• 12,800

• 1,600

• 3,200

• 6,400

What is the main challenge in calculating the number of bacteria over 24 hours?

• The initial bacteria count is unknown.

• The bacteria double frequently and antibiotics are given periodically.

• The antibiotic is not effective.

• The bacteria multiply too slowly.

What should you do if you have trouble understanding the problem?

• Meet the teacher during office hours.

• Ask a friend.

• Ignore it.

• Search online for answers.