Lesson 2 Formative Assessment

What does the plasma membrane primarily consist of?

• Glycoproteins

• Cholesterol

• Phospholipids

• Nucleotides

Which model is used to describe the structure of the plasma membrane?

• Fluid lattice model

• Solid-state model

• Fluid mosaic model

• Mosaic solid model

What is the primary function of membrane proteins?

• Energy storage

• Structural support

• Transport and communication

• DNA replication

What role does cholesterol play in the plasma membrane?

• Energy production

• Membrane fluidity regulation

• Protein synthesis

• Nucleotide transport

What is facilitated diffusion?

• Movement of water across a membrane

• Active transport of ions

• Passive transport of molecules through a protein channel

• Transport of molecules against a concentration gradient

Which of the following is a feature of active transport?

• Does not require energy

• Moves substances along the concentration gradient

• Requires ATP

• Only transports liquids

Which of the following is true about the sodium-potassium pump?

• Transports Na+ and K+ in the same direction

• Functions without ATP

• Pumps Na+ out of the cell and K+ into the cell

• Is a type of passive transport

What is the main role of the glycocalyx?

• DNA replication

• Cellular respiration

• Cell-to-cell recognition

• Protein degradation

What defines a peripheral protein?

• Spans the entire membrane

• Only found on the interior surface of the membrane

• Only found on the exterior surface of the membrane

• Attached to the surface of the membrane

What is osmosis?

• Diffusion of solutes

• Diffusion of water

• Active transport of ions

• Facilitated diffusion of water