Exam 2: BIO1201/ BIO 1201 Study Guide (Latest 2024/ 2025 Update) | Questions and Verified Answers| 100% Correct| Grade A – LSU

Exam 2: BIO1201/ BIO 1201 Study Guide (Latest 2024/ 2025 Update) | Questions and Verified Answers| 100% Correct| Grade A – LSU Q: transport proteins allow passage of hydrophilic substances across the membrane Q: carrier proteins Answer: bind to molecules and change shape to shuttle them across the membrane Q: passive transport Answer: the diffusion of a substance across a membrane with no energy investment Q: Diffusuion Answer: Spreading out of particles away from each other, from an area of high concentration to an area of low concentration. (move to where space is available) Q: concentation gradient Answer: substances diffuse from high concentration----> low concentration Q: Osmosis Answer: Diffusion of water through a selectively permeable membrane Q: Isotonic Answer: when the concentration of two solutions is the same (no net movement) Q: Hypertonic Answer: cell losses water and shrivils Q: hypertonic Answer: cell gains water and expands Q: In a plant cell water moves in and out affecting the size of what? Answer: central vacuole Q: facilitated diffusion Answer: the transport of substances through a cell membrane along a concentration gradient with the aid of carrier proteins Q: ion channels Answer: channel proteins that transport ions Q: gated channels Answer: open or close in response to a stimulus Q: active transport Answer: requires energy (ATP) to move substances against their concentration gradient Q: cotransport coupled transport by a membrane protein Q: transport proteins