What is osmosis?
Answer and explanation
Correct answer: A. The movement of water through a partially permeable membrane from high to low water concentration
- Step 1: Osmosis concerns water only, and it needs a partially permeable membrane. Step 2. Water moves down its concentration gradient, so no energy is needed. Answer: water moving from high to low water concentration across a membrane. Why not the others: active transport uses ATP, and osmosis does not move solutes.
Practise more Cells, Genetics, Ecology and Human Biology.
Free questions with an explanation for every one, and full timed Leaving Cert Ireland mock tests.
More Cells, Genetics, Ecology and Human Biology questions
- Which organelle is the main site of aerobic respiration in an animal cell?
- What is an enzyme?
- How many cells result from one complete round of mitosis in a diploid cell?
- Which tissue carries water and minerals upwards from the roots to the leaves of a plant?
- Which blood cells carry oxygen from the lungs to the tissues?
- How many chromosomes are in a normal human body (somatic) cell?