Mock exam paper D Ordinary Level Marking Scheme

PRE-LEAVING CERTIFICATE EXAMINATION, 2014

Home Economics

Marking Scheme and Solutions

Ordinary level

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Leaving Certificate Examination, 2013

HOME ECONOMICS – SCIENTIFIC AND SOCIAL (ORDINARY LEVEL)

2 ½ hours

280/320 MARKS

Section A

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

1. (a) State the elements found in carbohydrates ( 3 x 1m)

- Carbon - Hydrogen - Oxygen

(b) Explain the term gelatinisation ( 1 x 3m)

- Starch is mixed with water and heated, starch grains absorb the water and thicken liquid to form a paste

- Base of a sauce

2. (a) State two functions of Vitamin A ( 2 x 2m)

- Butter - Margarine - Milk

- Beef - Fish - Eggs etc…

(b) Name two sources of Vitamin A ( 2 x 1m)

- Maintaining normal vision - Vital for the formation of healthy mucus producing cells in the body

- Regulates growth and repair of cells - Protects body against infection

- Increases resistance to infection - Promotes healing of infected tissues

- Protects body against free radicals - Involved in iron metabolism

3. (a) Explain what is meant by the term Energy Output ( 2 x 2m)

- Energy required for basal metabolism + energy required for all activities

(b) Name two low – calorie food ( 2 x 1m)

- Fruit and vegetables - White fish and meat

- Cottage cheese - Potatoes

- Skimmed milk - Diet drinks etc…

4. (a) State two enzymes involved in converting protein to amino acids ( 2 x 1m)

- Pepsin - Trypsin - Rennin - Erypsin

(b) Outline two effects of heat on protein ( 2 x 2m)

- Chemical structure of protein is altered/ denatured

- Protein coagulated- changes from a liquid to a solid

- Protein becomes less soluble

- May cause colour change etc.…

5. (a) Name any two heat treatments which may be applied to milk ( 2 x 1m)

- Pasteurisation - Evaporated

- Sterilisation - Condensed

- UHT

(b) Outline two effects of homogenisation on milk ( 2 x 2m)

- Creamier taste

- Fat distributed evenly

6. Explain three physical ch...

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