Quiz on Passive Transport

What does the term "concentration" refer to in the context of passive transport?

• The amount of a substance dissolved in a unit of another substance

• The speed at which a substance moves

• The temperature of a solution

• The color of a solution

What is a concentration gradient?

• A measure of temperature difference between two regions

• A difference in concentration of a particular molecule between two regions

• A type of chemical reaction

• A form of energy transfer

Tags

NGSS.HS-PS1-5

In which direction do molecules tend to move in relation to a concentration gradient?

• Up a concentration gradient

• Down a concentration gradient

• Perpendicular to a concentration gradient

• In a circular motion

What is the structure of a bilayer lipid membrane?

• Single layer of lipids

• Double layer of lipids

• Triple layer of lipids

• No lipid layers

What does "amphipathic" mean in the context of a lipid membrane?

• Having a hydrophilic head and hydrophobic tail

• Being completely hydrophobic

• Being completely hydrophilic

• Having no distinct head or tail

What is the structure called where hydrophilic heads face outward and hydrophobic tails face inward, forming a spherical shape in water?

• Phospholipid bilayer

• Micelle

• Liposome

• Vesicle

Which structure is formed by two layers of phospholipids with hydrophilic heads facing outward and hydrophobic tails facing inward?

• Micelle

• Phospholipid bilayer

• Liposome

• Vesicle

Which type of phospholipid bond affects permeability?

• Double bond

• Single bond

• Triple bond

• Ionic bond

How does the length of the phospholipid tail affect permeability?

• Long tail increases permeability

• Short tail increases permeability

• Long tail decreases permeability

• Tail length has no effect

What is the effect of high temperature on viscosity and permeability?

• High viscosity, low permeability

• Low viscosity, high permeability

• High viscosity, high permeability

• Low viscosity, low permeability

Tags

NGSS.MS-PS1-4