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In opuntia, in night the R.Q. will beA. OneB. Less than oneC. More than OneD. Zero

Answer» Correct Answer - D
In some succulent or finely plants e.g., Opuritia, carbohydrates are incompletely oxidised to organic acids in dark without the evolution of `CO_(2)`
`underset("glucose")2C_(6)H_(12)3O_(2)rarrunderset("mallic acid")3C_(4)H_(6)O_(5)+3H_(2)O`
R.Q`=(CO_(2))/(O_(2))=(0)/(0)=0` (less than one)


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