Igcse Model Questions Vol1 2018 Biology Question 7
Practice objective / multiple choice question 7 from the 2018 Igcse Model Questions Vol1 Biology examination.
An endocrine gland secretes hormone X at a constant rate of \(5 \times 10^{-9}\ \text{mol s}^{-1}\) into the bloodstream. The blood volume is \(5\ \text{L}\) and the hormone is removed by the liver with a first‑order rate constant \(k = 0.02\ \text{s}^{-1}\). At steady state, 80 % of the hormone remains free (active). What is the steady‑state concentration of active hormone X in the plasma (in \(\text{mol L}^{-1}\))?
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About This Question
This is Igcse Model Questions Vol1 2018 Biology Question 7. It is one of the objective questions from the 2018 Igcse Model Questions Vol1 Biology examination.
Difficulty level: Medium .
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