Characteristic of Life & Cell Membrane

What is the function of cholesterol in the cell membrane?

• To maintain flexibility in different temperatures

• To provide energy for the cell

• To store genetic information

• To regulate cell division

What is the Fluid Mosaic Model used to describe?

• The function of mitochondria

• The structure of DNA

• The process of osmosis

• The cell membrane

According to the cell theory, living organisms are made of:

• D) Organ systems

• C) Cells

• B) Organs

• A) Tissues

Which characteristic of life involves maintaining a regulated balance?

• B) Reproduction

• D) Response to Stimuli

• A) Metabolism

• C) Homeostasis

What is the process that involves capturing and using energy for biological processes?

• D) Metabolism

• C) Digestion

• B) Respiration

• A) Photosynthesis

Match the following:

• Cholesterol

• allows large and polar molecules to pass through the membrane

• Transport or Channel Proteins

• located outside of the membrane; helps with cell communication and cell-to-cell connections

• Plasma or Cell Membrane

• 2 layers; allows small & non-polar molecules to pass through the membrane

• Phospholipid bilayer

• stabilizes and maintains flexibility of cell membrane

• Carbohydrates

• regulates what goes in and out of the cell

Which of the following describes the cell membrane?

• controls what enters and exits the cell

• protects and provide structure to the cell

• provides energy for the cell

• transports proteins and lipids throughout the cell

• helps the cell to move around

What is the function of the carrier and channel proteins of the cell membrane?

• allows large molecules to pass through the cell membrane

• allows small, non-polar molecules to pass through the cell membrane

• identifies the cell and allow for cell-to-cell communication

• stabilizes the fluidity of the cell membrane

What is the function of the phospholipid bilayer of the cell membrane?

• allows large molecules to pass through the cell membrane

• allows small, non-polar molecules to pass through the cell membrane

• identifies the cell and allow for cell-to-cell communication

• stabilizes the fluidity of the cell membrane

Identify the structure in the diagram.

• Phospholipid

• Cholesterol

• Triglyceride

• Carbohydrate