Propiedades de los fosfolípidos

Which term describes the property of phospholipid heads that love water?

• Hydrophobic

• Hydrophilic

• Lipophilic

• Lipophobic

What structure is formed by grouping the fatty acid tails in the middle of the membrane?

• Hydrophilic barrier

• Lipophilic barrier

• Hydrophobic barrier

• Isotonic barrier

What is the main function of the hydrophobic barrier in the cell membrane?

• Allow the free movement of water molecules

• Facilitate the mixing of hydrophobic and hydrophilic molecules

• Prevent the easy movement of water and water-loving molecules

• Increase the chemical reactivity of the cell

What is water composed of according to the image?

• 1 hydrogen and 2 oxygens

• 2 hydrogens and 1 oxygen

• 2 oxygens and 1 hydrogen

• 3 hydrogens

What happens when electrons are shared in the formation of water?

• A physical bond is created

• A proton is transferred

• A chemical bond is formed

• Nothing special happens

In the chemical bonds of water, how are the electrons distributed?

• Equally between the oxygen and the hydrogens

• Mainly towards the hydrogens

• Mainly towards the oxygen

• Electrons are not shared

Why is water considered a polar molecule?

• Because it has an ionic bond

• Because it has partial positive and negative charges

• Because it has no electrical charges

• Because it is symmetrical

What other substances are considered polar according to the information in the image?

• Carbon and helium

• Glucose, insulin, and ATP

• Nitrogen and oxygen

• Sodium and chlorine

What type of molecules can diffuse through the membrane because they match the chemical properties of the fatty acid tails?

• Hydrophilic molecules

• Large and polar molecules

• Hydrophobic and nonpolar gases

• Charged ions

Why can nonpolar molecules like gases diffuse through the membrane?

• Because they have positive and negative regions

• Because they do not have positive or negative regions

• Because they are large and complex

• Because they are soluble in water