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Edexcel A-Level Biology AS 3p 2 Applying Biology to Practical Contexts Questions

Practise applying biological understanding to practical choices, explaining why conditions or controls are used in investigations.

Syllabus
First assessment 2019
Course
Biology YBI11
Level
AS

Exam points

  • use the investigation context to justify controls, conditions or materials selected

Edexcel A-Level Biology AS 3p 2 Applying Biology to Practical Contexts Questions question 1

[Maximum number: 4]

Squid is an animal that is eaten in many parts of the world. The body of the squid is used as meat because it contains a lot of protein. The photograph shows some squid meat.

Figure for Question Edexcel A-Level Biology AS 3p 2 Applying Biology to Practical Contexts Questions question 1 — Edexcel A-Level Biology AS

The meat from squid is quite tough and is often treated with enzymes to break down the protein. Some fruits contain enzymes that can break down protein. Pineapples contain the enzyme bromelain and unripe papayas contain the enzyme papain. A study compared the effects of two different concentrations of these two enzymes on the meat from squid. The flowchart shows some of the steps in the method used in this study.

Figure for Question Edexcel A-Level Biology AS 3p 2 Applying Biology to Practical Contexts Questions question 1 — Edexcel A-Level Biology AS

Describe a method for estimating the soluble protein concentration in the beakers in step 4.

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