Bacteria Knowledge Quiz

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Which statement is true about bacteria?

are living organisms that consist of one cell.
Bacteria are the smallest of all living things.
Bacteria are the oldest and most diverse life forms.
All three statements are true.



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There are three common shapes of bacteria. They are

[color=red]Your answer:
rods, spheres, and spirals.
rods, spirals, and tubes.
spheres, hexagons, and spirals.
none of the above.



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Some bacteria are used to fight off harmful infections. Where would you find these helpful bacteria in the human body?

Your answer:
on your skin
in your intestines
in your nose and throat
on your skin and in your intestines, nose, and throat



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What is the significance of scientist Alexander Fleming accidentally finding a single mold growing in a used petri dish?

Your answer:
All petri dishes should be sterilized to prevent cross contamination.
It was the first form of cell mutation.
It was penicillin, a powerful antibiotic that kills bacteria.
He had created a toxic substance without even trying.



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In which of these foods might you find E. coli?

Your answer:
undercooked beef and non-pasteurized milk and fruit juice
raw chicken, skim milk, and raw eggs
any milk or fruit juice that’s left out in the sun
all of the above



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What do bacteria in our soils and waterways do to help our environment?

Your answer:
They serve as food for other organisms.
They decompose dead organisms and animal wastes into chemical elements.
Once ingested, they can protect animals from transmitted diseases.
They can protect plants from diseases.



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Bacteria have adapted to live in

Your answer:
the ocean.
the desert and hot springs.
snow or polar regions.
any climate.



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What has caused some bacteria to become drug-resistant?

Your answer:
the misuse of antibiotics to try and cure viral infections like the common cold
that 50 percent of all antibiotics end up in animal feed, creating super bacteria
both 1 and 2
none of the above



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What do helpful bacteria do for humans and animals?

Your answer:
They help digest food and destroy harmful organisms in the intestines.
Intestinal bacteria help the body absorb vitamins.
They ward off warts.
They live in their stomachs to help digest food.



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Which of the following is an example of how bacteria can help change a chemical into a form that can be used by plants?

Your answer:
Some bacteria convert carbon monoxide in the air into nutrients for plants.
Some bacteria convert nitrogen in soil into nitrate.
Some bacteria convert oxygen in water into nitrogen used by plants.
Some bacteria convert nitrogen in water into nitrogen used by plants.



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