Cell Transport

Which of the following is a type of passive transport?

• Endocytosis

• Diffusion

• Sodium-potassium pump

• Exocytosis

What is the main structural component of the cell membrane?

• Cellulose

• Phospholipids

• Glycogen

• Starch

Which of the following is an example of active transport?

• Osmosis

• Facilitated diffusion

• Sodium-potassium pump

• Simple diffusion

What is the function of channel proteins in the cell membrane?

• Store genetic information

• Facilitate movement of substances across the membrane

• Produce energy

• Synthesize proteins

Which part of the phospholipid bilayer is hydrophobic?

• Phosphate head

• Fatty acid tails

• Protein channels

• Carbohydrate chains

Which process moves water molecules across a selectively permeable membrane?

• Active transport

• Osmosis

• Endocytosis

• Exocytosis

Which of the following best describes the structure of the cell membrane?

• Single layer of proteins

• Double layer of phospholipids with embedded proteins

• Triple layer of carbohydrates

• Single layer of nucleic acids

Which type of transport requires energy from ATP?

• Passive transport

• Active transport

• Diffusion

• Osmosis

Facilitated diffusion is different from simple diffusion because it:

• Requires energy

• Uses transport proteins

• Moves substances against the concentration gradient

• Only moves water

Which of the following is an example of passive transport?

• Movement of glucose through a channel protein down its concentration gradient

• Movement of sodium ions against their concentration gradient

• Endocytosis of large particles

• Exocytosis of waste materials