Question paper
WA2 Practice Paper
40 marks · 55 min · 6 pages
10 multiple-choice questions and structured questions with answer lines. Chapters 3–5 (biological molecules and enzymes; nutrition in humans; transport in humans).
Term 2G2 / G3
Sec 3 Biology WA2 practice paper
WA2 is usually the Term 2 assessment. In the common scheme it covers the chemistry-of-life block and its delivery systems: biological molecules and food tests, enzyme action with temperature and pH graphs, the human digestive system with absorption, and the heart-and-blood transport network.
- Total marks
- 40
- Time
- 55 min
- Covers
- Chapters 3–5 (biological molecules and enzymes; nutrition in humans; transport in humans)
- Format
- 10 MCQ + 3 structured
The paper and mark scheme
Set out like a school paper, with a separate mark scheme for checking.
Mark scheme
PROWA2 Practice Paper — mark scheme
Answers · Marking points · 3 pages
Model answers with a mark for each creditworthy point — for marking at home or in class.
What’s tested
Commonly Chapters 3–5 (biological molecules; nutrition in humans; transport in humans). Some schools test only Chapters 3–4. Check your school’s assessment outline for the exact scope.
How to use this paper
- 1Print the paper, or open the PDF and write on paper.
- 2Set a timer for 55 min and work without notes.
- 3Mark your answers with the mark scheme, one point at a time.
- 4Redo every question you lost marks on, then revise that topic.
Preview
The first questions of Section A, as they appear on the paper.
Section A: Multiple choice[10 marks]
Answer all questions. For each question, write the letter (A, B, C or D) of the correct answer.
- 1( )
Iodine solution turns blue-black with
- Astarch
- Bglucose
- Cprotein
- Dfat
- 2( )
Biuret solution turns violet in the presence of
- Astarch
- Breducing sugars
- Cprotein
- Dwater
- 3( )
An enzyme is denatured at high temperatures because
- Aits substrate is used up
- Bit dissolves in the water
- Cits active site changes shape so the substrate no longer fits
- Dits pH rises to zero
- 4( )
Lipase digests fats into
- Aamino acids
- Bglucose
- Cglycogen
- Dglycerol and fatty acids
Revision checklist
- Build the food-test table cold: reagent, method, positive colour — iodine, Benedict’s, biuret, ethanol emulsion.
- Sketch the enzyme-rate graphs against temperature and pH, and explain both with the active-site story.
- Trace digestion: amylase, maltase, protease and lipase with substrates, products and secretion sites.
- Name every great vessel of the heart and predict the ABO transfusion table from markers-versus-antibodies.
- Sit the Chapter 3–5 quizzes first, then this paper in one 55-minute block.
Exam tips
- Food-test marks need reagent AND positive result — one without the other scores half.
- Enzyme graph explanations: reference the active site shape explicitly, not just "it denatures".
- Heart-trace and circulation questions: name the chamber or vessel, then state oxygenated or deoxygenated.
- Calculation marks: write the formula (output = stroke volume × rate), substitute, and give units.
Questions about the WA2
What is tested in Sec 3 Biology WA2?
Most schools test Chapters 3–5: food tests and the biological molecules, enzyme action with temperature and pH, the digestive system with villus absorption, and the heart, blood vessels and blood components. Your school’s outline gives the exact scope.
How long is the WA2 paper?
Formats vary by school. This practice paper has 40 marks and takes 55 minutes, mixing ten multiple-choice questions with structured questions, in the style most schools use for a Biology WA.
Is this paper based on a real school paper?
No. QuizQuip papers are written from scratch against the O-Level 6093 syllabus. QuizQuip is not affiliated with MOE or SEAB and does not host school or past examination papers.