Leaving Cert Biology 2013

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In the case of any five of the following pairs of terms, clearly distinguish between the first term and second term by writing a brief sentence about each.

(a)

Starch - polysaccharide (or explained) or polymer or correct test

Glucose - monosaccharide (or explained) or monomer or correct test

(b)

Amino Acid - building block of protein or monomer or unit of protein

Protein - polymer (of amino acids) or chain of (or many) amino acids

(c)

Cellulose - carbohydrate or polysaccharide or (found in plant) cell wall

Keratin - protein or (found in human) hair (or nails or skin)

(d)

Enzyme - a catalyst (or explained)

Hormone - a (chemical) messenger (or explained)

(e)

Biuret - (test for) protein

Benedict’s (Fehling’s) - (test for) reducing sugar (or glucose or maltose)

(f)

Fats - (lipids) solid at room temp

Oils - (lipids) liquid at room temp

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