Mock exam paper D Higher Level Marking Scheme

PRE-LEAVING CERTIFICATE EXAMINATION, 2014

Home Economics

Marking Scheme and Solutions

Higher level

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Leaving Certificate Examination, 2013

HOME ECONOMICS – SCIENTIFIC AND SOCIAL (HIGHER LEVEL)

2 ½ hours

280/320 MARKS

Section A

Answer any ten questions from this section. Each question is worth 6 marks.

1. (a) Name four properties of lipids ( 4 x 1m)

- Insoluble in water - Rancidity

- Soluble in organic solvents - Hydrogenation

- Smoke Point - Plasticity

- Flash Point - Emulsions/ Stabilisers

(b) Name two essential fatty acids (2 x 1m)

- Linoleic - Arachadonic

- Linolenic

2. (a) Draw the chemical structure of glucose (1 x 4m)

(b) Define dextrinisation (1 x 2m)

- Some starch foods containing starch also contain short chains of polysaccharides called dextrins.

- When heated a brown coloured compound called pyrodextrin is formed.

- Toast and bread crusts obtain some of their brown colour from pyrodextrins.

3. (a) Name two sources of vitamin D (2 x 1m)

- Fungi - Eggs

- Yeast - Oily Fish (Sardines, Herring, Mackerel, Tuna)

- Fish Liver Oils - Milk

- Margarine - Sunlight

- Liver - Fortified Cereals

(b) Identify two diseases resulting in a shortage of Vitamin D (2 x 2m)

- Osteoporosis - Affected cell growth

- Osteomalacia - Reduced immune system

- Rickets - Lack of insulin secretion by the pancreas

- Low calcium blood levels - Dental Decay

- Affects normal functioning of healthy nerves/ muscles

5. Name and describe two deficiency diseases ( 1m for name 2m for description x 2 )

-Night Blindness - Osteoporosis/ Osteomalacia/ Rickets - Constipation

- Beri – Beri - Anaemia - Diverticulus

- Scurvy -Goitre

- Rickets - Xerosis Conjuctiva etc.. + description

6. Complete the following table in relation to additives (2 x 2m for function) (2 x 1m Example)

Additive

Function

Example

Artificial Sweeteners

- Found in low calorie foods/drinks- used instead of sugar to sweeten

- ...

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