Biology A-Level
colorimetry and absorbance
What colorimetry and absorbance means in Biology A-Level, as defined for AQA.
Definition of colorimetry and absorbance
Check what you remember
Read the wording for your board, then hide it and explain colorimetry and absorbance in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
The colour of the surrounding solution is measured in a colorimeter using a filter of the complementary colour and calibrating with distilled water as the blank, and more pigment gives a higher absorbance.
Topics that use colorimetry and absorbance
- Transport across cell membranes (AQA A-Level)
Related terms
- active transport
- betalain pigment leakage
- calibration curve
- cristae
- Fluid mosaic model
- glycoproteins and glycolipids
- hydrophilic heads and hydrophobic tails
- lateral movement of membrane components
Using colorimetry and absorbance in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
Practise Biology questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
Start free
All Biology A-Level termsA week of Premium from your first lesson · Then the free plan continues · No card, no charge