16.3,16.4 and water properties lab Quiz AEF Summer Bio

What is the function of the cell membrane?

• It contains genetic material in the form of DNA.

• It is a large membrane-enclosed structure.

• It surrounds the cell and acts as a flexible barrier.

• It is responsible for photosynthesis.

What is the nucleus surrounded by?

• Ribosomes

• The cytoplasm

• The nuclear envelope

• Organelles

What is the main function of the cell membrane?

• To produce energy for the cell

• To regulate what enters and leaves the cell

• To store genetic information

• To synthesize proteins

What is a lipid bilayer?

• A single layer of lipids

• A double-layered sheet of lipids

• A protein structure in the cell

• A carbohydrate molecule

Which part of the lipid is hydrophobic?

• The head

• The tail

• The entire molecule

• The fatty acid portion

What does selectively permeable mean?

• All substances can cross the membrane

• No substances can cross the membrane

• Some substances can cross the membrane while others cannot

• Only water can cross the membrane

What is the fluid mosaic model?

• A model describing the cell's genetic material

• A model describing the cell's energy production

• A model describing the cell membrane structure

• A model describing the cell's protein synthesis

What role do proteins play in the cell membrane according to the fluid mosaic model?

• They store genetic information

• They produce energy for the cell

• They form channels and pumps that move substances across the membrane

• They synthesize lipids

What is the state of relatively constant internal physical and chemical conditions in living cells called?

• Homeostasis

• Metabolism

• Photosynthesis

• Respiration

How do cells maintain homeostasis?

• By controlling the movement of molecules across the cell membrane

• By producing more energy

• By increasing their size

• By dividing rapidly