Unit 3 Vocabulary

Question 1

A bacterium that obtains energy through chemosynthesis rather than by photosynthesis.

Answer 1

Chemoautotroph

Question 2

An organism that flourished in a salty environment.

Answer 2

Halophile

Question 3

An organism that needs a high-pressure environment in order to grow.

Answer 3

Barophile

Question 4

Grows at 40-80 degrees Celsius, also found in hot springs in Yellowstone national park.

Answer 4

Thermophile

Question 5

Organism that grows in high sugar concentration.

Answer 5

Osmophile

Question 6

Grows at 12-45 degrees Celsius, also found in humans.

Answer 6

Mesophile

Question 7

Organism that uses light for energy.

Answer 7

Photoheterotroph

Question 8

An organism that can live in the presence of oxygen, but does not require it.

Answer 8

Facultative aerobe

Question 9

A chamber for sterilizing with steam under pressure.

Answer 9

Autoclave

Question 10

A method of treating food by heating it to a certain point to kill pathogenic organisms.

Answer 10

Pasteurization

Question 11

A gas used as a sterilant for medical equipment and supplies.

Answer 11

Ethylene oxide

Question 12

A process by which a less concentrated solution passes through a membrane into a more concentrated solution.

Answer 12

Osmosis

Question 13

Inhibits the growth or multiplication of microbiota.

Answer 13

Microbistatic

Question 14

A substance or method that kills microbes.

Answer 14

Microbicidal

Question 15

A substance that contains chemicals that kill bacteria.

Answer 15

Disinfectant

Question 16

The practice of using antiseptics to eliminate the microorganisms that cause disease.

Answer 16

Antisepsis

Question 17

Grow at ph 0-5, also found in stomach acid and sulfuric acid springs.

Answer 17

Acidophile

Question 18

Grow at ph 7.0, also found in the human gut.

Answer 18

Neutralophile

Question 19

Organisms that use light as their source of energy.

Answer 19

Phototroph

Question 20

A sterilization method that uses ultraviolet light at sufficiently short wavelengths to break down micro-organisms.

Answer 20

Ultraviolet radiation