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HomeCXC CSEC BiologySense Organs: The Eye (Structure and Function)
CXC · CSEC · Biology

Sense Organs: The Eye (Structure and Function)
Practice Questions

20 CXC CSEC Biology questions on Sense Organs: The Eye (Structure and Function), each with instant feedback and a full examiner-style mark scheme.

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✨ Revision guide includes key terms, worked examples and exam technique for Sense Organs: The Eye (Structure and Function).

Try 2 sample questions on Sense Organs: The Eye (Structure and Function)

Question 1 · 1 mark · Difficulty 1/3

Which part of the eye is responsible for refracting light rays to focus them onto the retina?

  1. Iris
  2. Cornea
  3. Sclera
  4. Choroid
Show answer & explanation
✓ Answer: BCornea
Award 1 mark for identifying the cornea as the main refracting structure. A is incorrect — the iris controls the amount of light entering the eye, not refraction. C is incorrect — the sclera is the protective outer layer. D is incorrect — the choroid contains blood vessels and absorbs stray light.
Question 2 · 1 mark · Difficulty 1/3

A student in Trinidad conducted an experiment by shining a bright torch into a classmate's eye and observing the pupil. Which structure controls the size of the pupil?

  1. Lens
  2. Iris
  3. Retina
  4. Cornea
Show answer & explanation
✓ Answer: BIris
Award 1 mark for identifying the iris as the structure containing circular and radial muscles that control pupil size. A is incorrect — the lens changes shape for focusing. C is incorrect — the retina contains photoreceptors. D is incorrect — the cornea refracts light.
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20 questions · 25 min · free

CXC CSEC Biology: Sense Organs: The Eye (Structure and Function) FAQ

How many CXC CSEC Biology questions on Sense Organs: The Eye (Structure and Function) are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Sense Organs: The Eye (Structure and Function) for CXC CSEC Biology, with new questions added every week. Each question gives you instant feedback and a full examiner-style mark scheme that tells you exactly what would earn marks on a real CXC paper. The questions span the full difficulty range — from straightforward recall (level 1) right up to multi-step reasoning and evaluation (level 3) — so the bank works for first-pass revision and final exam-week stress testing alike.
Is Kramizo free for CXC CSEC students preparing for Biology?
Yes — completely free. Every student gets 45 questions a day on the free plan, with no card required and no trial countdown. That free quota works across every subject and every topic in our bank, so you can mix Sense Organs: The Eye (Structure and Function) practice with other Biology topics or even switch to a totally different CXC subject without paying anything. Kramizo's optional Pro plan removes the daily cap and adds detailed progress analytics, but the free tier is the real product — used by thousands of GCSE, IGCSE and CSEC students.
Are the Sense Organs: The Eye (Structure and Function) questions aligned to the official CXC CSEC Biology syllabus?
Every question is written against the published CXC CSEC Biology specification, including the exact command words (state, describe, explain, calculate, evaluate, etc.), mark allocations, and difficulty tier you'd see on a real CXC paper. Explanations are written in the style of official examiner mark schemes — they tell you what is being awarded marks and why distractors are wrong, not just whether you got it right. The bank is continually refined to match the latest syllabus updates from CXC.
How is Sense Organs: The Eye (Structure and Function) typically tested on CXC CSEC Biology papers?
Sense Organs: The Eye (Structure and Function) appears across multiple question types on real CXC CSEC Biology papers — most commonly as multiple-choice questions in the objective section, structured short-answer questions in the main paper, and occasionally as part of an extended response. Kramizo's practice bank reflects that mix: 4-option MCQs, true/false statements, fill-in-the-blank key terms, multi-select questions, and ordering questions. Working through the bank gives you exposure to every question style examiners actually use.

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