quiz 3

Question 1

Benedict’s reagent

Answer 1

Tests for glucose
Positive: Yellow, Orange, and Red

Question 2

Iodine (IKI / I2K reagent

Answer 2

Tests for starch
Positive: Dark Blue

Question 3

Sucrose ___ into glucose and fructose

Answer 3

Hydrolyzes

Question 4

Solvent

Answer 4

dissolving agent

Question 5

Solute

Answer 5

dissolved substance

Question 6

Selective Permeability

Answer 6

Some substances can cross the plasma membrane easier than others

Question 7

Osmosis

Answer 7

The diffusion of water across a selectively permeable membrane

Question 8

Tonicity

Answer 8

The ability of surrounding solution that causes the cell to gain or lose water

Question 9

Isotonic

Answer 9

solute concentration is the same as that inside the cell – no net movement

Question 10

Hypertonic

Answer 10

solute concentration is GREATER than that inside the cell – cell LOSES water

Question 11

Hypotonic

Answer 11

solute concentration is LESSER than that inside the cell – cell GAINS water

Question 12

Human/Animal cells prefer a

Answer 12

Isotonic Solution

Question 13

In a hypertonic environment, plant cells LOSE water which leads to a lethal effect

Answer 13

Plasmolysis

Question 14

*Plant cells prefer a

Answer 14

Hypotonic Solution

Question 15

Turgid

Answer 15

a plant cell in a hypotonic solution that swells until the wall opposes uptake

Question 16

Flaccid

Answer 16

a plant cell in an isotonic solution with no net movement of water into the cell - wilting

Question 17

Osmosis

Answer 17

the diffusion of water through a selectively permeable membrane from a region where it is highly concentrated to a region where its concentration is lower.

Question 18

Enzyme

Answer 18

biological catalysts – catalytic protein

Question 19

Catalysts

Answer 19

a chemical agent that speeds up a reaction without being consumed by the reaction

Question 20

Substrate

Answer 20

the reactant that an enzyme acts on

Question 21

Enzyme-Subtrate-Complex

Answer 21

formed when an enzyme binds to its substrate

Question 22

Active Site

Answer 22

the region on the enzyme where the substrate binds

Question 23

*Enzymes are affected by or are sensitive to:

Answer 23

Temperature, PH, Chemicals, Inhibitors

Question 24

Competitive Inhibitors

Answer 24

bind to the active site of an enzyme and compete with the substrate

Question 25

Noncompetitive Inhibitors

Answer 25

bind to another part of an enzyme, causing a shape change to the enzyme – making the active site less effective

Question 26

Cofactors

Answer 26

non protein enzyme helpers

Question 27

Inorganic Metals

Answer 27

– Iron (FERRIC), Magnesium, Zinc

Question 28

Coenzymes

Answer 28

– organic cofactors – vitamins – A, D, K, E