BIO Engaging Test Activity

Which type of molecules make up the polar head of the plasma membrane?

• Nonpolar and hydrophobic

• Polar and hydrophilic

• Nonpolar and hydrophilic

• Polar and hydrophobic

What non-convalent interaction can explain the observed "clumpings" in Sickle Cell Anemia

• The Hydrophobic Effect

• Van der Waals interaction

• Ionic Bonding

• Hydrogen Bonding

What is the function of sterol molecules in maintaining fluidity of the plasma membrane?

• To increase fluidity in hot temperatures

• To decrease fluidity in cold temperatures

• To maintain fluidity in both hot and cold temperatures

• To prevent fluidity in all temperatures

Which type of proteins do NOT span the entire membrane and are permanently associated with the cell membrane?

• Transmembrane proteins

• Amphipathic proteins

• Integral proteins

• Peripheral proteins

What type of transport does not use ATP and moves molecules from high to low concentration?

• Primary active transport

• Secondary active transport

• Facilitated diffusion

• Simple diffusion

Imagine a cell is HYPOTONIC compared to its surrounding solution. What does this mean?

• Water moves INTO the cell

• Water moves OUT OF the cell

• The surrounding solution is more concentrated

• The surrounding solution is less concentrated