MDCAT Biology MCQ #398

A germinating castor seed uses lipids as its primary respiratory substrate. How does the amount of CO2 evolved compare to the O2 consumed?

MDCAT Biology MCQ #398

  1. Question 1

    Q1. A germinating castor seed uses lipids as its primary respiratory substrate. How does the amount of CO2 evolved compare to the O2 consumed?

    • A) Equal CO2 and O2
    • B) Less CO2 evolved than O2 consumed
    • C) More CO2 evolved than O2 consumed
    • D) No O2 consumed

    Answer: Less CO2 evolved than O2 consumed

    Explanation: Lipids have an RQ of ~0.7, meaning less CO2 is evolved than O2 consumed; carbohydrates have an RQ of 1.0.