Cell Membrane Quiz

What is the structure of the cell membrane?

• Phospholipid bilayer with embedded proteins and other molecules

• Cholesterol bilayer with embedded carbohydrates

• Protein bilayer with embedded lipids

• Single layer of phospholipids

What are the functions of the cell membrane?

• Transporting oxygen, removing waste, regulating body temperature

• Generating energy, storing genetic information, producing proteins

• Protecting internal organs, producing hormones, maintaining pH balance

• Regulating movement of substances, providing structural support, facilitating cell communication

What is the main component of the cell membrane?

• phospholipids

• nucleic acids

• carbohydrates

• proteins

What is the role of proteins in the cell membrane?

• Proteins in the cell membrane are responsible for energy production.

• Proteins in the cell membrane only function in cell division.

• Proteins in the cell membrane have no role in cellular processes.

• Proteins in the cell membrane have multiple roles including transport, signaling, and adhesion.

What are the different types of proteins found in the cell membrane?

• integral proteins, peripheral proteins, and lipid-anchored proteins

• enzymes, receptors, and transporters

• nuclear proteins, cytoplasmic proteins, and mitochondrial proteins

• transmembrane proteins, cytoplasmic proteins, and extracellular proteins

How does the cell membrane maintain homeostasis?

• By allowing substances to freely move in and out of the cell.

• By preventing the movement of substances in and out of the cell.

• By controlling the movement of substances in and out of the cell.

• By relying on external factors to maintain homeostasis.

What is the importance of the phospholipid bilayer in the cell membrane?

• The phospholipid bilayer is important for providing structural support to the cell membrane.

• The phospholipid bilayer is important for separating the internal and external environments of the cell and controlling the movement of substances.

• The phospholipid bilayer is important for facilitating cell communication.

• The phospholipid bilayer is important for generating energy in the cell.

How do small molecules pass through the cell membrane?

• Exocytosis

• Passive diffusion

• Endocytosis

• Active transport

What is the process of active transport across the cell membrane?

• Active transport is the movement of molecules across the cell membrane against their concentration gradient, requiring the use of energy in the form of ATP.

• Active transport is the movement of molecules across the cell membrane with their concentration gradient.

• Active transport is the movement of molecules across the cell membrane through simple diffusion.

• Active transport is the movement of molecules across the cell membrane without the use of energy.

What is the role of carrier proteins in facilitated diffusion?

• Carrier proteins are not involved in facilitated diffusion.

• Carrier proteins transport all molecules across the cell membrane in facilitated diffusion.

• Carrier proteins transport specific molecules across the cell membrane in facilitated diffusion.

• Carrier proteins only transport molecules out of the cell in facilitated diffusion.