Marking scheme: Foundation & Exam Strategy Notes for Medical Lab Technology

Medical Lab Technology – Foundation & Exam Strategy

Topic: Marking Scheme

A marking scheme is the blueprint that examiners use to grade your answers.
Knowing it is the first step to turning every question into a “score‑maximiser.”

1️⃣ Simple Explanation

What	Why it matters
Points per question	Tells you how many marks each part of a question is worth.
Weighting	Shows the relative importance of topics.
Marking rubric	Lists the criteria used to award marks (content, accuracy, organisation, depth).
Time allocation	Helps you pace yourself so you finish every section.

Bottom line:
If you can see the marks before you write, you can plan your answer to hit every tick‑box.

2️⃣ Key Points

#	Point	Practical Take‑away
1	Total marks & sections	100 marks total → 10 sections of 10 marks each?
2	Objective vs. Subjective	MCQs = simple correct/incorrect; essays = partial credit possible.
3	Marking rubric	0–2 marks for each sub‑point: e.g., Definition (1 mark), Example (1 mark).
4	Partial credit	Even if you miss one bullet, you can still get 50 % of that part.
5	Time‑based marking	Many exams give extra marks to the first 3 minutes of an answer (fast‑write bonus).
6	Common traps	Re‑reading the mark scheme shows you what not to write (e.g., avoid irrelevant detail).
7	Revision & practice	Use the scheme to create “targeted” practice questions.
8	Marking thresholds	Some exams have a “minimum mark” per section to pass (e.g., 5 /10).
9	Mark allocation per slide	In slide‑based questions, marks per bullet → count your bullets.
10	Marking fairness	All candidates see the same scheme → fairness and transparency.

3️⃣ Worked Example

3.1 The Question

(10 marks)
Explain the principle of a Centrifuge and list three key safety precautions.
Marking Scheme:

Sub‑question	Marks	Criteria
1. Principle of a centrifuge	5	• Definition (1) • How centrifugal force works (1) • Typical applications (3)
2. Safety precautions	5	• List 3 precautions (3) • Brief explanation why each is important (2)

3.2 How to Score 10/10

Marks	Answer (Mini‑Template)	Why it scores
5	Principle • A centrifuge uses high‑speed rotation to separate components by density. • Centrifugal force creates an outward “gravity” that pushes heavier particles to the tube’s bottom. • Used for plasma separation, DNA extraction, and cell pelletisation.	1 mark for definition, 1 mark for mechanism, 3 marks for applications.
5	Safety • Secure lid – prevents samples from spilling during spin (Safety: prevents contamination). • Balanced load – ensures smooth operation and protects the machine (Safety: prevents mechanical failure). • Use of gloves – protects hands from splashes (Safety: protects user).	3 marks for listing 3 items, 2 marks for explaining why each is important.

3.3 Common Mistakes That Lose Marks

Mistake	Reason for Loss
Only stating “Centrifuge separates components”	Misses mechanism & applications → 3 marks lost.
Listing 5 precautions but only explaining 2	Extra items don’t help if explanations are missing → marks wasted.
Writing in a paragraph with no bullet points	Rubric expects bulleted list → 1–2 marks lost.

4️⃣ Quick Revision Summary

Know the total marks → plan time per section.
Read the rubric first → each mark has a specific criterion.
Answer in bullet points (if rubric demands) and keep them concise.
Use the “Definition‑Explanation‑Example” formula for conceptual questions.
Check safety/technical aspects – they often carry hidden marks.
Allocate marks: e.g., 30 % for MCQs, 40 % for short answers, 30 % for long essays.
Practice with the scheme → write a full answer and then score yourself.
Review examiner comments (if available) to see how marks were awarded.

Pro‑tip: Before the exam, make a one‑page cheat sheet for each section summarising the key marks and phrases you need to hit.

Happy studying – and may your answers perfectly line up with the marking scheme!