What Examiners Look for in Biology Essays

A marker works from a scheme, not an impression

Section B and Section C essays, worth Section B: 20 marks and Section C: 20 marks respectively, are marked against a scheme built from specific content points, each usually worth a set number of marks, rather than being given an overall grade based on how good the essay reads. A marker moves through an answer looking for whether each expected point has been made, in recognisable biological language, and totals the marks for the points found rather than forming a general impression of quality first and adjusting it afterward.

This means an essay can read smoothly and still score modestly if several expected points are missing, and an essay with plainer sentences can score well if it covers the required content precisely. Understanding this shifts what is worth checking in a finished essay, not "does this sound good" but "is every expected point actually present and identifiable".

Five things a marker is actually checking

• Content coverage, whether the essay contains the specific facts, processes, or comparisons the question and scheme call for, not just material that is related to the general topic.
• Correct terminology, whether each point is expressed using the specific biological term expected, since a correct idea in vague or everyday language often does not match a scheme built around precise words.
• Logical order, whether steps in a process are presented in the sequence they actually occur, and whether points in a "discuss" or "compare" answer are organised so related ideas sit near each other rather than scattered through the essay.
• Relevant examples, where a question asks for an example or application, whether the one given actually illustrates the point being made, rather than a generic example that could fit almost any similar question.
• Internal consistency, whether the essay contradicts itself, such as stating early on that a structure is impermeable to a substance and later describing that same substance passing through it; a marker reading for content will notice a contradiction even if each half of it is written confidently.

How this differs from what an essay is "about"

Two essays that discuss the same topic can be marked very differently even when both are broadly accurate, because a marker is not rewarding general familiarity with the topic, it is rewarding the presence of the specific points the scheme expects. An essay that spends several sentences on background context that is true but not asked for is, from a marker's perspective, using space that could have carried another marking point.

This is also why an essay that answers a slightly different question from the one actually set, even on the same topic, tends to score lower than expected: the marker is checking against what this question's scheme requires, not against general knowledge of the subject area.

What this means while writing

How do Section B and Section C essays differ?

Both essays are worth the same marks, but they tend to ask for different things. A Section B question is often built around applied material, a described experiment, a set of data, or a scenario, and asks you to explain or interpret it, so marks reward linking biology to the situation given.

A Section C question is usually more open, asking you to describe, discuss or compare a topic across the syllabus, so marks reward organised, complete coverage.

In both you choose one question from those offered, so the first decision is which one you can cover most completely, not which topic sounds most familiar. A topic you know broadly but cannot break into distinct marking points will score less than one where you can list the exact points a scheme expects.

How do you plan an essay so no marking point is missed?

Because marks come from distinct points, a short plan before writing is worth the minute it takes. Jotting the key terms and the order they belong in turns the essay into a list to work through, so a point is less likely to be forgotten halfway.

For a process, the plan is the correct sequence of steps; for a compare question, it is the paired features side by side.

A plan also stops the answer from drifting onto related but unasked material, which uses space without earning marks. Writing the plan in the answer booklet and crossing off each point as it is covered is a habit that makes coverage visible while there is still time to add a missing point.

Source:SRC-FORMAT

Frequently asked questions