Question

Proteins differ from carbohydrates and lipids in that they also contain nitrogen in addition to the carbon, hydrogen and oxygen. The type of nitrogen in proteins is a special form that the body can readily use: 16% of protein is composed of nitrogen (1 g nitrogen/6.25 g protein). Colin is a seven year old boy who has been described by his mother as a "picky eater". He doesn't like meat and will only eat a few milk products. On a typical day, Colin has a bowl of cereal and milk for breakfast, a honey sandwich for lunch, and one or two chicken fingers and mashed potatoes for supper. Throughout the day, he drinks a lot of apple juice and he enjoys salty snacks. An assessment of his diet reveals that he consumes an average of 1800 kcal and 21g of protein daily. Biochemical analysis shows that Colin's total daily nitrogen losses are 6g. His energy requirement is determined to be 1750 kilocalories per day. 1. What are the sources of protein in Colin's diet? (2 marks) 2. How would you describe Colin's present nitrogen balance? (2 marks) 3. How much protein does Colin have to eat to be in zero nitrogen balance? (2 marks) 4. What should Colin's nitrogen balance be? Why? (2 marks) I. 5. What suggestions would you have for Colin's mother to improve his diet? (2 marks) (Ctrl) -

Answer 1

ANS:1 The sources of protein in colin's diet:

• some milk product
• cereal
• Milk
• chicken fingers
• apple juice(very less amount)

so, these are the sources of protein in which per 100 grams of each: milk products contain 1.6 g of protein, cereal contains 6 g of proteins, Milk contains 3.4 g of protein, chicken fingers contain 21.1 g of protein and apple juice contain 0.1 g of protein.

ANS:2 colin's present nitrogen balance:

colin is a 7 year old boy and he eat few milk products, cereals, milk, chicken fingers and apple juice.

These diet contains protein but some diet contain more amount of protein and some contain in less amount of protein.

Protein made up of Nitrogen. our body can readily use: 16% of protein is composed of nitrogen. In colin's diet, he consumes 21gm of protein daily.

1 g nitrogen $\rightarrow$ 6.25 g of protein

colin consume 21g of protein from his diet.

so, 21g of protein in colin's diet / 6.25 g of protein per gm of nitrogen,

so, colin consumes 3.36 g of nitrogen in his diet.

Thats why colin's present nitrogen balance is 3.36 g.