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Biology: The Unity and Diversity o...

0th Edition
STARR
ISBN: 9780357093795

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Chapter
Section
FindFindarrow_forward

Biology: The Unity and Diversity o...

0th Edition
STARR
ISBN: 9780357093795

Textbook Problem

AC3 plant absorbs a carbon radioisotope (as part of 14CO2). In which compound does the labeled carbon appear first? Which compound forms first if a C4 plant absorbs the same radioisotope?

Summary Introduction

To explain: The first compound in which the radioactive-labeled carbon appears in C3 plants.

Concept introduction: The C3 and C4 plants are named after the first carbon compound in which the carbon dioxide is fixed in these plants. In C3 plants, the first carbon is fixed in phosphoglycerate (PGA), a 3-carbon compound and hence the name C3 plants.

Summary Introduction

To explain: The first compound in which the radioactive-labeled carbon appears in C4 plants.

Concept introduction: The C3 and C4 plants are named after the first carbon compound in which the carbon dioxide is fixed in these plants. In C4 plants, the first carbon is fixed in oxaloacetate (OAA), a 4-carbon compound and hence the name C4 plants.

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