Lab 2

Question 1

Phospholipid bilayer

Answer 1

consists of two layers of phospholipids, with a hydrophobic, or water-hating, interior and a hydrophilic, or water-loving, exterior. The hydrophilic (polar) head group and hydrophobic tails (fatty acid chains) are depicted in the single phospholipid molecule.

Question 2

Tonoplast

Answer 2

The membrane that surrounds the cell’s large central vacuole

Question 3

Fluid mosaic model

Answer 3

various observations regarding the structure of functional cell membranes
-describes the cell membrane as a two-dimensional liquid that restricts the lateral diffusion of membrane component

Question 4

Transmittance

Answer 4

Ratio of transmitted light to incident light

- expressed as %

Question 5

Optical Density

Answer 5

a measure of the extent to which a substance transmits light or other electromagnetic radiation

Question 6

Absorbance

Answer 6

Negative log of transmittance

- measured at a particular wavelength symbol (A)

Question 7

Turbidity

Answer 7

Particles in suspension scatter light

Question 8

Dilution (D) equation

Answer 8

D= volume of original solution/ (volume of original solution + volume of solvent)

Question 9

Concentration of undiluted solution

Answer 9

Cu= Cd/ D

Question 10

Standard Curve

Answer 10

Shows the relationship btw absorbance and concentration

Question 11

Incident Light

Answer 11

Light striking the sample.

Question 12

Transmitted Light

Answer 12

Light leaving the sample.