B2.1 Membranes and Transport MCQ

What is the main theme of the text?

• Evolution and Natural Selection

• Photosynthesis and Respiration

• Cells and Membranes

• Genetics and Heredity

Tags

NGSS.HS-LS4-1

NGSS.HS-LS4-2

NGSS.HS-LS4-4

What is the level of organisation discussed in the text?

• Cells

• Tissues

• Organs

• Organ Systems

Tags

NGSS.HS-LS1-2

Why are membrane proteins difficult to study by traditional biochemical methods?

• They are easily degraded

• They are too small to observe

• They are highly reactive

• They are not water soluble

What is the role of aquaporins in the movement of water across membranes?

• Prevent water movement

• Convert water into ions

• Act as barriers to water

• Facilitate rapid transport of water

What is the process of facilitated diffusion?

• Passive transport of molecules through channel proteins

• Active transport of molecules against a concentration gradient

• Movement of water through aquaporins

• Diffusion of small uncharged particles

What is the function of integral proteins in membranes?

• Facilitate diffusion through the bilayer

• Attach to one side of the bilayer

• Float on the surface of the bilayer

• Penetrate the bilayer and anchor within it

What is the process of osmosis?

• Passive transport of water from high to low solute concentration

• Facilitated diffusion of water through aquaporins

• Active transport of water against a concentration gradient

• Passive transport of water from low to high solute concentration

What is the role of glycoproteins and glycolipids in cell membranes?

• Cell division

• Waste removal

• Energy production

• Cell adhesion and recognition

What is the fluid mosaic model of membrane structure?

• Random arrangement of molecules in a membrane

• Representation of proteins and lipids in a fluid bilayer

• Solid structure of proteins in a membrane

• Gel-like consistency of membrane components

What is the function of sodium-potassium pumps in cells?

• Form cell junctions

• Facilitate glucose absorption in the small intestine

• Regulate membrane fluidity

• Maintain resting potential in neurons

Tags

NGSS.HS-LS1-3