8. (a)
(i) Name a food source that is rich in protein - Leaving Cert Biology - Question 8 - 2019
Question 8
8.
(a)
(i) Name a food source that is rich in protein.
(ii) Give a reason why the body needs protein in the diet.
(b) Answer the following questions about food t... show full transcript
Worked Solution & Example Answer:8. (a)
(i) Name a food source that is rich in protein - Leaving Cert Biology - Question 8 - 2019
Step 1
Food source that is rich in protein
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Answer
A valid food source rich in protein is meat, which is a great source of proteins essential for various bodily functions.
Step 2
Reason why the body needs protein in the diet
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Answer
The body needs protein primarily for growth and repair of tissues. Proteins are vital for the maintenance of muscle mass and overall bodily functions.
Step 3
What reagent did you use to test for protein?
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Answer
The reagent used to test for protein was Biuret solution, which consists of sodium hydroxide and copper sulfate.
Step 4
What colour was this reagent before you added it to the food sample?
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Answer
Before adding it to the food sample, the Biuret reagent was blue.
Step 5
What was the final colour of this reagent if protein was present?
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Answer
If protein was present, the final colour of the Biuret reagent would change to purple or mauve.
Step 6
Name a piece of apparatus required to carry out this test in a laboratory.
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Answer
A dropper or test tube is a valid piece of apparatus that is required to carry out the protein test in a laboratory.
Step 7
Describe a safety precaution that should be taken during the investigation.
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Answer
A safety precaution that should be taken during the investigation is the use of safety glasses to protect the eyes, as well as wearing a laboratory coat and gloves to ensure safety from potential spills.
Step 8
What test solution did you use?
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Answer
The test solution used for reducing sugar was Benedict's solution (or Fehling's solution).
Step 9
What colour was this solution before you added it to the food sample?
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Answer
Before adding it to the food sample, the Benedict's solution was blue.
Step 10
What was the final colour of this solution if reducing sugar was present?
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Answer
If reducing sugar was present, the final colour of the Benedict's solution would turn red or allow brown.
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