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When training, an athlete noticed some types of T-shirts became wetter and heavier due to sweating - Edexcel - GCSE Biology - Question 10 - 2022 - Paper 1
Question 10
When training, an athlete noticed some types of T-shirts became wetter and heavier due to sweating. This athlete has three T-shirts, each made of a different materi... show full transcript
Worked Solution & Example Answer:When training, an athlete noticed some types of T-shirts became wetter and heavier due to sweating - Edexcel - GCSE Biology - Question 10 - 2022 - Paper 1
Step 1
Devise a method this athlete could use to find the best T-shirt for training.
Answer
To determine the best T-shirt for training, the athlete can conduct an experiment involving the three T-shirts:
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Material Identification: Identify the materials of each T-shirt, noting any advertised features concerning moisture-wicking or breathability.
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Controlled Environment: Weigh each T-shirt when dry, then put on each T-shirt and perform a standardized physical activity (e.g., running for 30 minutes) in a controlled environment to ensure consistency.
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Measurement of Wetness: After the activity, weigh each T-shirt again to determine how much they have absorbed in terms of water weight. Additionally, the athlete could assess how heavy each T-shirt feels and how comfortable they are post-exercise.
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Analysis: Compare the weight difference to identify which T-shirt absorbed the least sweat and consider the subjective comfort level during the training session.
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Conclusion: Finally, the best T-shirt will be considered the one that became the least wet and that felt the most comfortable during the training.
Step 2
Which is the test and result for a food containing protein?
Answer
The correct answer is D) biuret solution is used and the solution turns purple.
The biuret test is specifically used for detecting proteins. When biuret solution reacts with peptide bonds in proteins, it produces a purple coloration, indicating the presence of protein in the food sample.