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Biology

GCSE · AQA

QuestionsFlashcards

Communicable Diseases
Monoclonal Antibodies
- Producing Monoclonal Antibodies
  6
- Uses of Monoclonal Antibodies
  7
Plant Disease
- Detection and Identification of Plant Diseases
  6
- Plant Defence Responses
  6

Osmosis Flashcards

All 6 cards in this deck

What is osmosis?: The diffusion of water from a dilute solution to a concentrated solution through a partially permeable membrane.
What is a partially permeable membrane?: A membrane that lets small molecules such as water through but not larger solute molecules.
Which way does water move by osmosis when a cell is placed in a solution more concentrated than its contents?: Water moves out of the cell, so the cell loses mass.
True or false? In osmosis, water moves from a concentrated sugar solution to a dilute sugar solution.: False. Water moves from the dilute solution to the concentrated solution.
True or false? Osmosis only moves water molecules, not solutes.: True. Only water moves across the partially permeable membrane in osmosis.
Why does an animal cell burst in pure water but a plant cell does not?: Water enters both by osmosis, but the plant cell has a cell wall that withstands the pressure.