MCQ
Which enzyme catalyses the reaction below? Pyruvic acid $\rightarrow$ Carbon dioxide $+$ Ethanol
- APyruvic acid decarboxylase.
- BAlcohol dehydrogenase.
- CNone of these.
- ✓Both of these.
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$II.$ It comprises dead elements
$III.$ It comprises highly lignified cell wall
$IV.$ It is the peripheral part
$V.$ It is dark and tough
Which of the above property doesn't belongs to heart wood?