Although proteins differ in nitrogen content because of differences in their amino acid compositions, the N content of protein in a typical Western diet averages 16% (w/w). Using this average value, calculate your daily dietary protein requirement to maintain nitrogen balance assuming you excrete 120 mg of N/kg body weight each day.

3 i. Define Biological Value (BV) of Proteinsii. What are the advantages of this protein evaluation method when compared to Nbalance and chemical score?5iii. A bull consumes 7 kg DM of feed containing 60 g N/kg. The bull excretes 120 g N inthe faeces and 50 g N in the urine. The feacal and urinary N had 20 g metabolic feacalnitrogen (MFN) and 6 g endogenous urinary nitrogen (EUN) respectively.Calculate the BV of the protein in the diet.

The activity of pepsin was measured at various pH values. When the temperature and the concentrations of pepsin and substrate were held constant, the following activities were obtained:   pH Activity 1.0 0.5 1.5 2.6 2.0 4.8 3.0 2.0 4.0 0.4 5.0 0.0 Predict the activity of pepsin in the blood at pH 7.4.

What is the meaning of the term "Calories" written on food packaging? By convention, one Calorie (C), with a capital C, that is used for food is equal to one kilocalorie. On your Activity Sheet, paste a label or cut-out portion from food packaging indicating the number of Calories. (If you have no packaging at home, you may invent and draw your own label.) Convert these Calories into kilocalories and calories.