Gce Model Questions Vol1 2018 Biology Question 17

Practice objective / multiple choice question 17 from the 2018 Gce Model Questions Vol1 Biology examination.

Gce Model Questions Vol1 2018 Biology Objective / Multiple Choice Medium Difficulty
Question 17 GCE_MODEL_QUESTIONS_VOL1 • 2018 • BIOLOGY • objective

During moderate exercise a subject consumes oxygen at a rate of \(1.2\) L min\(^{-1}\). The measured respiratory quotient (RQ) is \(0.85\). Each litre of \(O_{2}\) yields \(20.1\) kJ of metabolic energy. Calculate (a) the total energy expended (in kJ) during a 45‑minute session, (b) the volume of \(CO_{2}\) produced (in litres), and (c) the proportion of the energy derived from carbohydrate versus fat, assuming carbohydrate has \(RQ=1.0\) and fat has \(RQ=0.7\).

Answer Options

A. Energy ≈1000 kJ; CO₂ ≈44.0 L; 55 % carbohydrate, 45 % fat
B. Energy ≈950 kJ; CO₂ ≈42.0 L; 60 % carbohydrate, 40 % fat
C. Energy ≈1150 kJ; CO₂ ≈48.5 L; 40 % carbohydrate, 60 % fat
Correct Answer D. Energy ≈1085 kJ; CO₂ ≈45.9 L; 50 % carbohydrate, 50 % fat
Correct Answer
D
Correct Option:
Energy ≈1085 kJ; CO₂ ≈45.9 L; 50 % carbohydrate, 50 % fat

About This Question

This is Gce Model Questions Vol1 2018 Biology Question 17. It is one of the objective questions from the 2018 Gce Model Questions Vol1 Biology examination.

Difficulty level: Medium .

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