Bacteria: Science Lesson: Quick Quiz

Why is it important to keep food in the refrigerator?
1. Because bacteria multiply very quickly when they are exposed to light.
2. Because bacteria multiply very quickly in warm temperatures.
3. Because cool temperatures help beneficial bacteria grow more quickly.
4. Because warm temperatures kill beneficial bacteria.
Which of the following is true about cells?
1. Cells are like tiny chemical factories.
2. Cells are the smallest units of life.
3. All cells contain DNA.
4. All of the above
Which of the following is true about bacteria?
1. Almost all of the bacteria found in nature live inside of people.
2. Most of the bacteria found inside of people are harmful.
3. Bacteria can only survive at temperatures between 40°F–140°F.
4. Bacteria can live in many different kinds of environments.
Bacteria reproduce
1. by absorbing other bacteria.
2. by splitting in half.
3. only inside the human body.
4. only when the temperature is above 80°F.
Bacteria
1. can be used to make food.
2. can be seen without a microscope.
3. are made up of more than one cell.
4. have no DNA.
What can be found in animal cells but not in bacterial cells?
1. Organelles
2. DNA
3. Cell membrane
4. Water
Lactobacillus acidophilus and Lactobacillus animalis have the same
1. DNA.
2. genus name.
3. species name.
4. organelles.
A colony of bacteria starts out with 1000 cells. According to the graph, how many cells are there after three hours?
1. 2000
2. 3000
3. 4000
4. 8000
What shape is a bacillus bacterium?
What’s an example of exponential growth?
1. 10 + 1 0 + 10
2. 10 – 10 – 10
3. 10 × 10 × 10
4. 10 + 100 + 1000