Biology Module 3

Question 1

Plasma membrane

Answer 1

A semipermeable membrane that surrounds all cells.

Question 2

Ribosome

Answer 2

A two-part structure in all cells where proteins are synthesized.

Question 3

Pathogen

Answer 3

An organism that causes disease.

Question 4

Flagellum

Answer 4

A slender protein structure used by many cells to move around.

Question 5

Diffusion

Answer 5

Movement of a solute from an area of high concentration to an area of low concentration.

Question 6

Osmosis

Answer 6

Movement of a solvent across a semipermeable membrane from an area where the solute concentration is low to an area where the solute concentration is high.

Question 7

Endocytosis

Answer 7

The process by which cells take in a substance by surrounding it with the plasma membrane and making a vesicle that holds the substance.

Question 8

Exocytosis

Answer 8

The process by which a substance in a vesicle is released into the cell’s environment by fusing with the plasma membrane.

Question 9

Aerobes

Answer 9

Organisms that use oxygen in their cellular respiration.

Question 10

Anaerobes

Answer 10

Organisms that do not use oxygen in their cellular respiration.

Question 11

Endosymbiosis

Answer 11

The idea that eukaryotes arose as a result of one prokaryote engulfing others.