Cell Membrane Structure and Function Quiz

What is the primary role of membranes surrounding cells and organelles?

• To produce proteins

• To act as a physical boundary and control substance passage

• To store genetic information

• To provide energy to the cell

How do cell membranes interact with their environment?

• By replicating DNA

• Through cell recognition and signaling

• By storing nutrients

• By producing energy

What are phospholipids composed of?

• Nucleotides and proteins

• Carbohydrates and lipids

• Glycerol, two fatty acids, and a phosphate head

• Amino acids and sugars

Why do phospholipids form a bilayer in water?

• Because they are hydrophilic

• Due to their hydrophobic tails avoiding water

• Due to their ability to conduct electricity

• Because they are bonded to each other

What is the significance of the fluid property of membranes?

• It allows for the storage of energy

• It enables the membrane to change shape and size easily

• It helps in DNA replication

• It provides structural support

What is the role of integral proteins in the membrane?

• To replicate DNA

• To produce energy

• To form channels for molecule passage

• To store genetic information

How do proteins contribute to cell signaling?

• By storing nutrients

• By acting as receptors for signal molecules

• By producing enzymes

• By replicating DNA

What is the fluid mosaic model?

• A model describing DNA replication

• A model explaining energy production

• A model of protein synthesis

• A model of the membrane structure with moving proteins

What role do carbohydrates play in the membrane?

• They provide energy

• They produce proteins

• They store genetic information

• They assist in cell recognition and signaling

How does cholesterol affect the membrane?

• It produces energy

• It stores genetic information

• It controls membrane fluidity

• It increases membrane permeability