BIO 253 BUNDLED EXAMS 2026 CELLULAR AND MOLECULAR BIOLOGY PRACTICE SET ANSWERS FULL SOLUTION

BIO 253 BUNDLED EXAMS 2026 CELLULAR
AND MOLECULAR BIOLOGY PRACTICE SET
ANSWERS FULL SOLUTION

◉ Microvilli.
Answer: Cell extensions that increase surface area.


◉ Cilia.
Answer: Hair-like structures that aid in movement.


◉ Flagella.
Answer: Long whip-like structures for cell motility.


◉ Passive Transport.
Answer: Movement across membrane without energy use.


◉ Simple Diffusion.
Answer: Movement of molecules from high to low concentration.


◉ Facilitated Diffusion.
Answer: Transport via proteins without ATP usage.

, ◉ Osmosis.
Answer: Water diffusion across a semipermeable membrane.


◉ Tonicity.
Answer: Effect of solution concentration on cell volume.


◉ Isotonic Solution.
Answer: Equal concentration inside and outside the cell.


◉ Hypertonic Solution.
Answer: Higher concentration outside, causes cell shrinkage.


◉ Hypotonic Solution.
Answer: Lower concentration outside, causes cell swelling.


◉ Filtration.
Answer: Movement of water and solutes through a membrane.


◉ Active Transport.
Answer: Energy-requiring movement against concentration
gradient.