Answer five of the following:
(a) Name a monosaccharide - Leaving Cert Biology - Question 1 - 2012
Question 1
Answer five of the following:
(a) Name a monosaccharide.
(b) Give the formula of the monosaccharide referred to in (a).
(c) Name a polysaccharide that can be form... show full transcript
Worked Solution & Example Answer:Answer five of the following:
(a) Name a monosaccharide - Leaving Cert Biology - Question 1 - 2012
Step 1
(a) Name a monosaccharide.
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Answer
A monosaccharide is a simple sugar that cannot be hydrolyzed into smaller sugars. An example of a monosaccharide is glucose.
Step 2
(b) Give the formula of the monosaccharide referred to in (a).
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Answer
The chemical formula for glucose, the monosaccharide mentioned in (a), is C₆H₁₂O₆.
Step 3
(c) Name a polysaccharide that can be formed from the monosaccharide referred to in (a).
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Answer
A polysaccharide that can be derived from glucose is starch. Starch consists of long chains of glucose units linked together.
Step 4
(d) Give one way in which an amino acid differs from a monosaccharide, in terms of chemical composition.
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Answer
A key difference between an amino acid and a monosaccharide is that amino acids contain nitrogen (N) in addition to carbon (C), hydrogen (H), and oxygen (O), whereas monosaccharides do not contain nitrogen.
Step 5
(e) What do carbohydrates and fats have in common, in terms of chemical composition?
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Both carbohydrates and fats are primarily composed of the elements carbon (C), hydrogen (H), and oxygen (O).
Step 6
(f) How may one fat differ from another, in terms of chemical composition?
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Answer
Different types of fats may vary in their fatty acid composition; for instance, some fats may contain saturated or unsaturated fatty acids, or they may be phosphorylated (having a phosphate group) which distinguishes them from each other.
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