OCR General Certificate of Secondary Education (GCSE) Biology Practice Exam

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Study for the OCR GCSE Biology Exam. Use multiple choice questions and quiz flashcards with explanations and hints. Excel in your exams!

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Which statement is true regarding red-green colour blindness?

It can be completely cured with medication
It leads to not seeing any colours at all
It occurs when specific cones in the retina malfunction
It improves with age in all individuals

The correct answer is: It occurs when specific cones in the retina malfunction

Red-green color blindness is a genetic condition that affects an individual's ability to distinguish between red and green hues. This condition arises due to malfunctions in the specific cones in the retina, which are responsible for detecting different wavelengths of light corresponding to colors. The retinal cones sensitive to red and green light are not functioning properly, leading to the color discrimination difficulties characteristic of this condition. The other statements do not accurately represent red-green color blindness. It is not something that can be cured with medication, as it is a genetic trait, and thus treatment options are limited to coping strategies. Individuals with red-green color blindness do not see any colors at all; rather, they have difficulty differentiating between certain shades. Additionally, red-green color blindness does not universally improve with age; it generally remains stable throughout a person's lifetime.