Answer five of the following:
(a) Which food type may be identified in the laboratory by the use of Sudan III or brown paper?
(b) Give one role for a named mineral in plants - Leaving Cert Biology - Question 1 - 2011
Question 1
Answer five of the following:
(a) Which food type may be identified in the laboratory by the use of Sudan III or brown paper?
(b) Give one role for a named mineral... show full transcript
Worked Solution & Example Answer:Answer five of the following:
(a) Which food type may be identified in the laboratory by the use of Sudan III or brown paper?
(b) Give one role for a named mineral in plants - Leaving Cert Biology - Question 1 - 2011
Step 1
Which food type may be identified in the laboratory by the use of Sudan III or brown paper?
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Answer
The food type that can be identified using Sudan III or brown paper is fat (or oil or lipid). These tests demonstrate the presence of lipids in various food substances.
Step 2
Give one role for a named mineral in plants.
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Answer
One role of a named mineral, such as magnesium, in plants is to serve as a core component of chlorophyll, which is essential for photosynthesis.
Step 3
What colour indicates a strong positive result of the Fehling’s or Benedict’s test for reducing sugar?
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Answer
A strong positive result of the Fehling’s or Benedict’s test for reducing sugar indicates a colour change to orange or red.
Step 4
Give a role of lipids in cells.
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Answer
Lipids play several roles in cells, including being components of membranes, which help maintain cell structure, and serving as storage for energy.
Step 5
Give a role of water in the human body other than as a component of cytoplasm and body fluids.
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Answer
Water acts as a solvent in the human body, facilitating chemical reactions and transporting nutrients and waste products.
Step 6
How many common amino acids are found in proteins?
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Answer
There are 20 common amino acids found in proteins, which are the building blocks essential for protein synthesis.
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