Question

question 7
match the membrane molecule to its function.
column a
1
allow passage of materials that do not normally
cross through phospholipids
2
maintain the fluidity of the membrane
3
make up the majority of the molecules of the
membrane, in two layers
4
like chemical identification tags for cellular
communication
column b
a. membrane proteins
b. membrane carbohydrates
c. cholesterol
d. phospholipids

Explanation:

1. Membrane proteins can form channels or carriers to allow the passage of substances that cannot cross the phospholipid bilayer easily.
2. Cholesterol helps in maintaining the fluidity of the membrane. It prevents the membrane from becoming too rigid at low temperatures and too fluid at high temperatures.
3. Phospholipids make up the majority of the membrane molecules, forming a bilayer.
4. Membrane carbohydrates are often attached to proteins (glycoproteins) or lipids (glycolipids) and act like chemical identification tags for cellular communication.

Answer:

1. a. Membrane Proteins
2. c. Cholesterol
3. d. Phospholipids
4. b. Membrane Carbohydrates