Aqa A Level Biology Paper 1 Study Guide Rated A+

The full range of different proteins that a cell is able to produce at a given time {Ans: What is the proteome of a cell? (1)}The mass of organelles at the bottom of the test tube after centrifugation. {Ans: Pellet}The passive movement of water molecules across a partially permeable membrane from a high water potential to a low water potential, down a concentration gradient. (Distilled water = 0Ψ) {Ans: Osmosis}Fluid: All the components can move around. Mosaic: Many different components all fit together {Ans: Fluid mosaic Structure [Fluid][Mosaic] (2)}1. High rate of transpiration 2. Water lost through stomata causing high tension in xylem 3. Causes less water movement from xylem to phloem {Ans: Phloem pressure is reduced during the hottest part of the day. Use information in the graph above along with your understanding of transpiration and mass flow to explain why. (3)}70s ribosomes {Ans: Name an organelle found in both a chloroplast and a prokaryotic cell. (1)}