Biology 9700 · AS & A Level · Testing for biological molecules

Testing for biological molecules — practice question

Four solutions were examined using Benedict’s solution. The table gives the colours of the solutions after the test. Which row represents solutions that could have produced these results?

  • Asolution 1: 0.05% reducing sugar; solution 2: 0.5% non-reducing sugar; solution 3: 1.0% reducing sugar; solution 4: 0.1% reducing sugar
  • Bsolution 1: 0.5% reducing sugar; solution 2: 0.0% reducing sugar; solution 3: 1.0% reducing sugar; solution 4: 0.1% reducing sugar
  • Csolution 1: 1.0% reducing sugar; solution 2: 1.0% non-reducing sugar; solution 3: 1.5% reducing sugar; solution 4: 0.5% reducing sugar
  • Dsolution 1: 0.05% non-reducing sugar; solution 2: 0.5% reducing sugar; solution 3: 1.0% non-reducing sugar; solution 4: 0.1% non-reducing sugar

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI