A root hair cell absorbs nitrate ions from the soil. The concentration of nitrate ions is lower in the soil than inside the cell.
A substance reduces the energy released by respiration in the cell.
What is the most likely effect on nitrate ion uptake?
It decreases because diffusion always requires energy.
It increases because active transport requires less energy.
It decreases because active transport requires energy.
It increases because diffusion reverses the concentration gradient.
80 exam-style questions on Edexcel GCSE Biology 6.2 Transport in plants, covering 6.2.1 Root hair cell adaptations, 6.2.2 Structure of xylem and phloem, 6.2.3 Transpiration and stomata, 6.2.4 Translocation of sucrose, 6.2.5 Leaf structure for photosynthesis, 6.2.6 Environmental factors on water uptake, 6.2.7 Rate calculations for transpiration, and 6.2.8 Plant adaptations to extreme environments. Each one has a worked solution and a mark scheme showing where the marks go.