The Cell Membrane & Cell Theory - Quiz

2. TRUE or FALSE: All living cells have a cell membrane.

• TRUE
• FALSE

3. The cell membrane carries out important functions. Which of these are NOT functions of the cell membrane? Select all that apply.

• It enables cell adhesion to form tissues
• It controls the absorption of light
• It enables the cell to communicate with other cells and its external environment
• It controls the entry and exit of molecules in and out of the cell
• It regulates the temperature of the cell

4. Many of these molecules make up the basis of the cell membrane, with other molecules and proteins embedded within it. What is the name of this molecule? Give your answer as a single word with no period at the end.

5. This molecule has a "head" and a "tail". Which end of the molecule is hydrophilic?

• The head
• The tail
• Neither

7. "The component labeled as F is a type of protein not mentioned above. It is usually loosely attached to the cell membrane. This type of protein is known as a ________________ protein." What is the missing word in this sentence? Give your answer as a single word with no period at the end. Note, there are two possible correct answers - pick only ONE to give as your answer.

10. What is the function of cholesterol in the cell membrane?

• It is required for channel proteins to function
• It is a cell marker so that the immune system recognizes the cell as "self"
• It controls the fluidity of the membrane
• It is a filler molecule and serves no purpose

11. Which two words are used to represent a model of the cell membrane?

• Dynamic
• Permeable
• Mosaic
• Gatekeeper
• Fluid

Identify the part of the membrane identified as A.

• carbohydrate
• cholesterol
• protein
• phospholipid

Where can PROTEINS be found when part of a plasma membrane?

• On the outside of the membrane

• On the inside of the membrane

• Embedded part of the way into the membrane

• Embedded the whole way through the membrane

• All of the above

Which type of cell has no nucleus?

• Eukaryote

• Prokaryote

• Animal

• Plant