Cell Membrane Quiz

What is the primary function of the plasma membrane?

• To provide energy to the cell

• To control traffic into and out of the cell

• To produce proteins

• To store genetic information

Tags

NGSS.MS-LS1-2

What characteristic of the plasma membrane allows some substances to cross it more easily than others?

• Rigidity

• Selective permeability

• Thickness

• Color

What are the main components of cellular membranes?

• Carbohydrates and nucleic acids

• Lipids and proteins

• Vitamins and minerals

• Sugars and starches

What is the structure of a phospholipid?

• Hydrophilic head and hydrophobic tail

• Hydrophobic head and hydrophilic tail

• Hydrophilic head and hydrophilic tail

• Hydrophobic head and hydrophobic tail

How are phospholipids and proteins arranged in the membranes of cells?

• In a rigid, static structure

• In a fluid mosaic model

• In a crystalline lattice

• In a random assortment

What holds the membrane together primarily?

• Ionic bonds

• Covalent bonds

• Hydrophobic interactions

• Hydrogen bonds

What is the effect of cholesterol on membrane fluidity at high temperatures?

• Increases fluidity by allowing more movement

• Decreases fluidity by restraining phospholipid movement

• Has no effect on fluidity

• Increases fluidity by breaking down phospholipids

What happens to a membrane when it solidifies?

• It becomes more permeable

• Its permeability remains unchanged

• Its permeability decreases

• It becomes more fluid

How does the presence of unsaturated hydrocarbon tails affect membrane fluidity?

• Makes the membrane less fluid

• Has no effect on fluidity

• Makes the membrane more fluid

• Causes the membrane to solidify

What is the role of membrane proteins in terms of movement?

• They move faster than lipids

• They are larger and move more slowly than lipids

• They do not move at all

• They move at the same speed as lipids