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Which of the following amino acid is helpful in the synthesis of plastoquinone?

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Which of the following amino acid is helpful in the synthesis of plastoquinone?

(a) Valine

(b) Isoleucine

(c) Leucine

(d) Tyrosine

I had been asked this question in exam.

I need to ask this question from Chloroplast Structure and Function topic in portion Chloroplast Structure and Function of Cell Biology

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The correct choice is (d) Tyrosine

The explanation: Plastoquinone is a branched chain unsaturated quinone, which helps in the electron transport chain of photosynthesis. P-hydroxyphenylpyruvate is synthesized from tyrosine which then converts finally to plastoquinone.

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