Root hair cells take in nitrate ions by active transport because

  1. nitrate concentration is higher inside the cell than in the soil
  2. the soil has no water
  3. nitrate concentration is lower in the cell
  4. nitrate is a gas
Answer

A) nitrate concentration is higher inside the cell than in the soil

Uptake against the gradient needs energy. O Level Biology · Topic 3 Movement into and out of Cells · 3.2 Active transport

Biology MCQ · More O Level Biology: Movement into and out of Cells MCQs · Practise