Neco Model Questions Vol1 2019 Biology Question 9

Practice objective / multiple choice question 9 from the 2019 Neco Model Questions Vol1 Biology examination.

Neco Model Questions Vol1 2019 Biology Objective / Multiple Choice Medium Difficulty
Question 9 NECO_MODEL_QUESTIONS_VOL1 • 2019 • BIOLOGY • objective

A subject produces 1.5 L of urine per day containing urea at a concentration of 30 g L^{-1}. The subject's daily protein intake is 80 g, and protein is on average 16 % nitrogen by weight. Assume that 90 % of the absorbed nitrogen is excreted as urea (molar mass of urea = 60 g mol^{-1}; atomic mass of nitrogen = 14 g mol^{-1}). Calculate the expected mass of urea excreted per day and compare it with the measured urinary urea mass. State the difference.

Answer Options

A. Expected ≈ 35 g; measured 35 g; excess ≈ 0 g
B. Expected ≈ 20 g; measured 50 g; excess ≈ 30 g
Correct Answer C. Expected ≈ 25 g; measured 45 g; excess ≈ 20 g
D. Expected ≈ 30 g; measured 40 g; excess ≈ 10 g
Correct Answer
C
Correct Option:
Expected ≈ 25 g; measured 45 g; excess ≈ 20 g

About This Question

This is Neco Model Questions Vol1 2019 Biology Question 9. It is one of the objective questions from the 2019 Neco Model Questions Vol1 Biology examination.

Difficulty level: Medium .

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