Intro to Cell Membrane

Intro to the Cell Membrane

Biomolecules and Structures ​

Be able to compare the structures of the cell membrane and understand their functions.​

​I will...

Compare the structures of the Cell Membrane and learn their functions. ​

​We will...

Multiple Choice

Using a light microscope, a student identified the following characteristics of four organisms found in a sample of pond water.

Based on the observations of the student, which organisms most likely belong to the taxonomic group for bacteria?

• Organisms 1 and 2

• Organisms 3 and 4

• Organisms 1 and 4

• Organisms 2 and 3

Multiple Choice

Four different types of cells are shown. Which characteristic is shared by all four cells?

• A mechanism for transforming sunlight into energy

• Self-locomotion

• Membrane bound organelles that transport substances

• Genetic material composed of DNA

Open Ended

Using the sentence stem below, what is one characteristic of the cell membrane? (you must write in complete sentence)

"One characteristic of the cell membrane is..."

Fill in the Blanks

The phosphate head of the membrane is __________ and attracted to water, while the fatty acid tails are ___________ and repel water.

Multiple Choice

Transmembrane proteins span the width of cell membranes. Four types of transmembrane proteins are shown in a section of cell membrane.

Although these proteins have different specific functions, they all —

• stop chemical reactions within the cell

• synthesize molecules that signal other cells

• help the cell interact with its external environment

• remove large waste particles from the cytoplasm of the cell

Open Ended

Using the sentence stem below and writing in a complete sentence, list one characteristic of cell membrane proteins.

"One characteristic of cell membrane proteins is..."

Open Ended

Using complete sentences, what is one function of carbohydrates on the surface of the cell membrane?

"One function of carbohydrates on the cell membrane is..."

Multiple Choice

Models of the human immunodeficiency virus (HIV) and an animal cell are shown below.

What is the difference in the function of the glycoprotein structures of an HIV virion and the cilia of an animal cell?

• The glycoprotein structures are used for attachment, and the cilia are used to move fluids surrounding the cell.

• The glycoprotein structures are used to obtain nutrition, and the cilia are used to secrete proteins.

• The glycoprotein structures are used to provide physical support for the viral envelope, and the cilia strengthen the cell membrane.

• The glycoprotein structures are used for defense, and the cilia are used for locomotion.

Multiple Choice

Which table correctly identifies how the plasma membrane contributes to the maintenance of cellular homeostasis?