Question 1

Which of the following is NOT a characteristic of living organisms?

Accepted Answer

Ability to photosynthesize

Question 2

Why is the overuse of antibiotics a major health concern?

Accepted Answer

It increases the risk of developing multidrug-resistant bacteria, also known as superbugs.

Question 3

Which scenario best illustrates evolution in a population of bacteria?

Accepted Answer

Gene frequency changes from one generation to the next due to antibiotic exposure.

Question 4

What is the primary mechanism by which bacteria become resistant to antibiotics?

Accepted Answer

Random mutations in bacterial genes

Question 5

Which of the following actions can help slow the spread of antibiotic resistance?

Accepted Answer

Finishing your prescribed course of antibiotics and not sharing them with others

Question 6

In the analogy comparing wolves and elk in Yellowstone to bacteria in the human gut, what role do the 'wolves' play?

Accepted Answer

They keep other populations (elk or harmful bacteria) in check, maintaining balance.

Question 7

Which of the following is a valid reason for the environmental saturation of antibiotics?

Accepted Answer

High antibiotic use in livestock production

Question 8

A scientist wants to test a new drug's effect on bacterial resistance. Which study design would provide the most reliable results?

Accepted Answer

An experimental study with a control group and random assignment

Question 9

Which of the following is a direct health effect of disrupting the balance of bacteria in the human gut with antibiotics?

Accepted Answer

Increased risk of secondary infections by opportunistic microbes

Question 10

What is the trend in antibiotic production over time, and what is a likely cause?

Accepted Answer

The number of new antibiotics developed has decreased, likely due to market failure and the exhaustion of 'low-hanging fruit.'

Question 11

Which of the following is an example of a hypothesis in scientific inquiry?

Accepted Answer

If a harmless species resembles a harmful one, it will be attacked less often by predators.

Question 12

In the coral and kingsnake mimicry study, what was the main purpose of using artificial brown snakes?

Accepted Answer

To serve as a control group for comparison with the mimic kingsnakes

Question 13

Which of the following best describes the force of natural selection in the evolution of antibiotic resistance?

Accepted Answer

Antibiotics kill sensitive bacteria, allowing resistant bacteria to survive and reproduce.

Question 14

Which of the following is a recommended action to reduce the spread of antibiotic resistance in the community?

Accepted Answer

Wash hands frequently with plain soap and water

Question 15

Which of the following is a plausible but incorrect explanation for why probiotics may improve GI health after antibiotic use?

Accepted Answer

Probiotics restore the balance of beneficial bacteria in the gut

Question 16

Which element is NOT essential to critically assess when reading a scientific study?

Accepted Answer

The color of the cover page

Question 17

Which of the following is a real-world example of secondary infection due to antibiotic use?

Accepted Answer

Overgrowth of C. difficile in the gut after antibiotics kill beneficial bacteria

Question 18

Which of the following best describes the concept of 'quorum sensing' in bacteria?

Accepted Answer

Bacteria communicate with each other to coordinate behavior and toxin secretion

Question 19

Which of the following is a benefit of using viruses that kill bacteria (bacteriophages) as a solution to antibiotic resistance?

Accepted Answer

They are more selective than broad-spectrum antibiotics, targeting specific bacteria

Question 20

Which of the following is NOT a valid reason to support the food industry's lack of antibiotic use?

Accepted Answer

It increases the need for more antibiotics

Ch. 1: Biology—Exploring Life, Evolution, and Scientific Inquiry

Study Guide - Practice Questions