04 BIO B1 Transport Phenomena Bundle
EXAMINATION SET 2026 SOLVED
QUESTIONS GRADED A+
● What types of molecules require a transport protein to cross a
membrane? Answer: Polar molecules and ions, such as glucose and
sodium ions, require a transport protein to cross a membrane.
● How do cholesterol and fatty acid types affect membrane fluidity?
Answer: Cholesterol helps maintain membrane fluidity by preventing
fatty acid chains from packing too closely together. Unsaturated fatty
acids increase fluidity due to their kinks, while saturated fatty acids
decrease fluidity.
● What is a semipermeable membrane? Answer: A semipermeable
membrane allows certain molecules to pass through while blocking
others, based on size, charge, or solubility.
● What is selective permeability? Answer: Selective permeability is the
property of a membrane that allows some substances to pass through
while restricting others.
● What does amphipathic mean? Answer: Amphipathic refers to
molecules that have both hydrophilic (water-attracting) and hydrophobic
(water-repelling) parts, such as phospholipids.
EXAMINATION SET 2026 SOLVED
QUESTIONS GRADED A+
● What types of molecules require a transport protein to cross a
membrane? Answer: Polar molecules and ions, such as glucose and
sodium ions, require a transport protein to cross a membrane.
● How do cholesterol and fatty acid types affect membrane fluidity?
Answer: Cholesterol helps maintain membrane fluidity by preventing
fatty acid chains from packing too closely together. Unsaturated fatty
acids increase fluidity due to their kinks, while saturated fatty acids
decrease fluidity.
● What is a semipermeable membrane? Answer: A semipermeable
membrane allows certain molecules to pass through while blocking
others, based on size, charge, or solubility.
● What is selective permeability? Answer: Selective permeability is the
property of a membrane that allows some substances to pass through
while restricting others.
● What does amphipathic mean? Answer: Amphipathic refers to
molecules that have both hydrophilic (water-attracting) and hydrophobic
(water-repelling) parts, such as phospholipids.
