quiz 3 Flashcards
Benedict’s reagent
Tests for glucose
Positive: Yellow, Orange, and Red
Iodine (IKI / I2K reagent
Tests for starch
Positive: Dark Blue
Sucrose ___ into glucose and fructose
Hydrolyzes
Solvent
dissolving agent
Solute
dissolved substance
Selective Permeability
Some substances can cross the plasma membrane easier than others
Osmosis
The diffusion of water across a selectively permeable membrane
Tonicity
The ability of surrounding solution that causes the cell to gain or lose water
Isotonic
solute concentration is the same as that inside the cell – no net movement
Hypertonic
solute concentration is GREATER than that inside the cell – cell LOSES water
Hypotonic
solute concentration is LESSER than that inside the cell – cell GAINS water
Human/Animal cells prefer a
Isotonic Solution
In a hypertonic environment, plant cells LOSE water which leads to a lethal effect
Plasmolysis
*Plant cells prefer a
Hypotonic Solution
Turgid
a plant cell in a hypotonic solution that swells until the wall opposes uptake