Antibiotic resistance

The video explains how bacteria develop antibiotic resistance, often by producing proteins that block the antibiotic's entry into cells. This resistance is a result of natural selection, similar to how species evolve. The MRSA bacterium is highlighted as a prime example, having developed resistance to penicillin just four years after its mass production began.

How do some organisms resist the effects of antibiotics?

• By producing proteins that enhance antibiotic absorption

• By producing proteins that disable or block antibiotic entry

• By increasing the antibiotic's potency

• By reducing the antibiotic's shelf life

What process allows antibiotic resistance to develop in organisms?

• Genetic mutation

• Natural selection

• Artificial selection

• Random chance

Which organism is known for its rapid development of resistance to penicillin?

• Mycobacterium tuberculosis

• E. coli

• Staphylococcus aureus (MRSA)

• Streptococcus pneumoniae

How soon after penicillin was mass-produced did MRSA show resistance?

• Two years

• Four years

• Ten years

• Twenty years

What is a key characteristic of MRSA in terms of antibiotic resistance?

• It is slow to develop resistance

• It quickly adapts to new antibiotics

• It is resistant to all antibiotics

• It only resists penicillin