Lab. 3

Question 1

Porkaryotes

Answer 1

• Simple cell structure
• No nucleus
• Structures: cell membrane, cytoplasm, nucleoid region, chromosomes

Question 2

Eukaryotes

Answer 2

• More complex
• DNA enclosed within membrane (bound nucleus)
• Membrane-bound organelles

Question 3

Eukaryotic Cell include

Answer 3

the protists, fungi, plants, and animals

Question 4

Protists

Answer 4

Diverse group of organism

• found in aquatic environments
• Plantlike protists (algae), fungus-like (slime and water molds) and animalike protists (protozoans)

Question 5

Structures that are found only in plant cells

Answer 5

Cell wall, chloroplast, large vacuole

Question 6

Solvent

Answer 6

agent that is used to dissolve material

Question 7

Solute

Answer 7

dissolved substances

Question 8

Concentration gradient

Answer 8

A difference between concentrations in space

Question 9

Active transport

Answer 9

molecules move from low to high concentrations (energy required)

Question 10

Diffusion

Answer 10

Type of passive transport in which molecules spread from areas of high concentration to areas of low concentration

Question 11

Plasma membrane

Answer 11

• A phospholipid bilayer with embedded proteins

- selective permeable- a membrane prevents the passage of some substances but allows the passage of others

Question 12

Osmosis

Answer 12

The diffusion of water across the membrane

Question 13

tonicity

Answer 13

Relative concentrations of solutions that determine the direction and extent of osmosis

Question 14

Osmolarity

Answer 14

measure of solute concentration

Question 15

Hypotonoic

Answer 15

solution has lower solute (more water) than cell

Question 16

isotonic

Answer 16

solute concentration is the same inside and outside of the cell

Question 17

Hypertonic

Answer 17

solution has higher solute (less water) than cell