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Question 17

An investigator measured the metabolic rate of a resting domestic cat using a closed-circuit respirometer. The respirometer chamber was filled with oxygen-rich air, and potassium hydroxide was present to absorb any carbon dioxide exhaled by the animal.

At the start of the measurement (t=0t = 0t=0), the volume of gas in the chamber was 8.60 dm38.60\text{ dm}^38.60 dm3. After 151515 minutes, the volume of gas in the chamber had decreased to 7.15 dm37.15\text{ dm}^37.15 dm3.

The cat had a mass of 4.4 kg4.4\text{ kg}4.4 kg.

Calculate the cat's oxygen consumption in cm3 kg−1\text{cm}^3\text{ kg}^{-1}cm3 kg−1 during this 151515-minute period.

Give your answer to 222 significant figures.

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Exchange surfaces Questions

  1. A Level
  2. /Biology
  3. /Exchange surfaces

34 exam-style questions on OCR A A Level Biology Exchange surfaces. Each one has a worked solution and a mark scheme showing where the marks go.

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