Lab Quiz 4

Question 1

a semi-solid matrix with holes which allows only small molecules to pass through it

Answer 1

agar plates

Question 2

What is the objective of lab 4?

Answer 2

To understand the processes of diffusion, osmosis and selectively permeable membranes

Question 3

The tendency for the molecules of a substance to spread out, randomly, into a given space

Answer 3

diffusion

Question 4

Movement of water from a region of low solute concentration to a region of higher solute concentration through a semi permeable membrane

Answer 4

osmosis

Question 5

How do cells rely on osmosis?

Answer 5

Nutrient and water uptake
Waste removal
Maintenance of homeostasis

Question 6

A measure of the effective osmotic pressure gradient

Answer 6

tonicity

Question 7

Higher solute concentration

Answer 7

hypertonic

Question 8

Lower solute concentration

Answer 8

hypotonic

Question 9

Equal solute concentration

Answer 9

isotonic

Question 10

movement from lower to higher concentration

Answer 10

active diffusion

Question 11

movement from higher to lower concentration

Answer 11

passive diffusion

Question 12

passing easily from higher to lower concentration through the membrane without help

Answer 12

simple diffusion

Question 13

passing through the membrane with the help of an enzyme from higher to lower concentration

Answer 13

facilitated diffusion

Question 14

passing through the membrane from low to high concentration with the use of ATP

Answer 14

active transport

Question 15

What is the goal of lab 5?

Answer 15

To identify the parts of an enzyme-catalyzed reactions and test the effects of pH and temperature on enzyme activity

Question 16

Many enzymes act as ______, designed to speed up the rate of a specific chemical reaction

Answer 16

catalysts

Question 17

Free energy can perform _____

Answer 17

work

Question 18

the cleavage of chemical bonds by the addition of water

Answer 18

hydrolysis

Question 19

The _____ (3º) structure of a protein is made up of multiple secondary structures whose side chains interact with each other to form a specific geometric shape.

Answer 19

tertiary

Question 20

Anything that changes the 3º structure at the active site of the enzymes will affect the ability of that enzyme to function

Answer 20

denaturation

Question 21

Every enzyme functions best at an optimum __, and less well within a range on either side of it.

Answer 21

pH