Igcse Model Questions Vol1 2018 Biology Question 35

Practice objective / multiple choice question 35 from the 2018 Igcse Model Questions Vol1 Biology examination.

Igcse Model Questions Vol1 2018 Biology Objective / Multiple Choice Medium Difficulty
Question 35 IGCSE_MODEL_QUESTIONS_VOL1 • 2018 • BIOLOGY • objective

A person has a glomerular filtration rate (GFR) of 120 mL min\(^{-1}\). The plasma urea concentration is 6 mmol L\(^{-1}\). Ninety‑nine percent of the filtered urea is reabsorbed in the renal tubules. The individual produces 1.5 L of urine per day.\n\n(a) Calculate the total amount of urea excreted in a day (mmol).\n\n(b) Calculate the concentration of urea in the urine (mmol L\(^{-1}\)).

Answer Options

A. a) 102.4 mmol (≈102.368 mmol); b) 68.2 mmol L⁻¹ (≈68.245 mmol L⁻¹)
Correct Answer B. a) 10.4 mmol (≈10.368 mmol); b) 6.9 mmol L⁻¹ (≈6.912 mmol L⁻¹)
C. a) 10.4 mmol (≈10.368 mmol); b) 0.69 mmol L⁻¹ (≈0.691 mmol L⁻¹)
D. a) 1.04 mmol (≈1.0368 mmol); b) 6.9 mmol L⁻¹ (≈6.912 mmol L⁻¹)
Correct Answer
B
Correct Option:
a) 10.4 mmol (≈10.368 mmol); b) 6.9 mmol L⁻¹ (≈6.912 mmol L⁻¹)

About This Question

This is Igcse Model Questions Vol1 2018 Biology Question 35. It is one of the objective questions from the 2018 Igcse Model Questions Vol1 Biology examination.

Difficulty level: Medium .

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