The scientific article you have studied is adapted from articles about Alzheimer's disease published in The Conversation: August 31, 2023 and November 13, 2022 Use the information from the scientific article and your own knowledge to answer the following questions. Give one reason why a placebo was used in the donanemab trial (Paragraph 33). (1) ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................

Biology

IGCSE&ALevel

EDEXCEL

Exam No：WBI1501-que-20241024 Year：2024 Question No：8(h)

Answer:

An explanation that includes one of the following points:
- \{to act as a control / as a method of control (1)
- to compare with the group which received \{the drug / donanemab\} (1)
- remove \{bias / psychological effect\} (1)
- without a placebo group to compare against, it is not possible to know whether the treatment itself had any effect (1)

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Knowledge points:

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