The R.Q. (Respiratory Quotient) is zero when | vedclass

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(C) The $R.Q.$ is defined as the ratio of the volume of $CO_2$ evolved to the volume of $O_2$ consumed during respiration $(R.Q. = \frac{Volume \ of \

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Not oxidized at all

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(C) The $R.Q.$ is defined as the ratio of the volume of $CO_2$ evolved to the volume of $O_2$ consumed during respiration $(R.Q. = \frac{Volume \ of \ CO_2 \ evolved}{Volume \ of \ O_2 \ consumed})$.In certain succulent plants (like $Opuntia$ or $Bryophyllum$),organic acids are formed during the night,and $CO_2$ is consumed rather than evolved. However,if no $CO_2$ is evolved at all,the numerator becomes zero.Therefore,when the respiratory substrate is not oxidized to release $CO_2$,or in specific conditions where $CO_2$ evolution is zero,the $R.Q.$ value is zero.

The $R.Q.$ (Respiratory Quotient) is zero when the respiratory substrate is:

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