Name the four elements that are always present in protein. Name one other element that may be present in protein. Give two good sources of protein in the human diet. Name a test or the solution(s) that is (are) used to detect protein in a food source. State the following in relation to (d). 1. The initial colour of the solution(s) 2. The final colour if protein is present.

Leaving Cert Biology Food & Food Tests: Name the four elements that are

Name the four elements that are always present in protein - Leaving Cert Biology - Question 3 - 2006

Question 3

Name the four elements that are always present in protein. Name one other element that may be present in protein. Give two good sources of protein in the human... show full transcript

Worked Solution & Example Answer:Name the four elements that are always present in protein - Leaving Cert Biology - Question 3 - 2006

Step 1

Name the four elements that are always present in protein.

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Answer

The four elements that are always present in protein are carbon, hydrogen, oxygen, and nitrogen.

Step 2

Name one other element that may be present in protein.

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Answer

An additional element that may be present in protein is sulfur.

Step 3

Give two good sources of protein in the human diet.

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Answer

Two good sources of protein in the human diet include:

Meat (such as fish or poultry)
Pulses (such as beans or lentils)

Step 4

Name a test or the solution(s) that is (are) used to detect protein in a food source.

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Answer

The Biuret test is commonly used to detect protein in food sources. It involves adding sodium hydroxide (NaOH) and copper sulfate to the sample.

Step 5

State the following in relation to (d). 1. The initial colour of the solution(s)

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Answer

The initial colour of the solution(s) is blue.

Step 6

State the following in relation to (d). 2. The final colour if protein is present.

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Answer

The final colour if protein is present changes to purple or violet.

Name the four elements that are always present in protein - Leaving Cert Biology - Question 3 - 2006

Worked Solution & Example Answer:Name the four elements that are always present in protein - Leaving Cert Biology - Question 3 - 2006

Name the four elements that are always present in protein.

Name one other element that may be present in protein.

Give two good sources of protein in the human diet.

Name a test or the solution(s) that is (are) used to detect protein in a food source.

State the following in relation to (d). 1. The initial colour of the solution(s)

State the following in relation to (d). 2. The final colour if protein is present.

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