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Date November 2016 Marks available 3 Reference code 16N.3.SL.tz0.11
Level Standard Level Paper Paper 3 Time zone time zone 0
Command term Describe Question number 11 Adapted from N/A

Question

List two sources of protein, one for a vegetarian and one for a non-vegetarian diet.

1. Vegetarian diet

 

2. Non-vegetarian diet

 

 

[2]
a.

State one enzyme responsible for the digestion of protein from the mouth to the small intestine.

[1]
b.

Describe the possible harmful effects of excessive protein intake on an Olympic weightlifter.

[3]
c.

Explain the benefits of the use of creatine as a nutritional ergogenic aid in sport.

[3]
d.

Markscheme

Vegetarian sources of protein
pulses/beans
lentils
nuts
quorn
oats/wheat
tofu
rice
eggs
cheese
milk/yoghurt

Non-vegetarian sources of protein
red meat
poultry
fish
eggs

Award [1 max] for vegetarian and [1 max] for non-vegetarian.

Only accept eggs once.

 

a.

pepsin ✔

trypsin ✔

Accept protease as general term.

b.

loss of renal/kidney function due to increased excretion of nitrogen through urine ✔

increase kidney damage by placing greater demand to excrete the unused excess protein ✔

increased secretion of calcium which can lead to an increased risk of osteoporosis ✔

increased risk of cancers such as prostate or bowel cancer ✔

increased body weight/extra fat/risk of CHD due to increase in saturated fat typically found in some protein sources ✔

may cause dehydration due to the requirement of water to aid protein synthesis or to dilute protein and convert into urea ✔

c.

increases/improves PCr in muscle ✔

improves peak power/performance during intense exercise ✔

improves strength ✔

possibly stimulates protein synthesis ✔

d.

Examiners report

Generally answered well.

a.

Generally answered well.

b.

Generally answered well.

c.

Generally answered well for two marks though most struggled to get three.

d.

Syllabus sections

Option D: Nutrition for sports, exercise and health » D.4. Nutritional strategies » D.4.13. Outline the possible harmful effects of excessive protein intake.
Option D: Nutrition for sports, exercise and health » D.4. Nutritional strategies
Option D: Nutrition for sports, exercise and health

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