First slide

The C4 Pathway

Question

Bundle sheath cells

Easy

A

Are rich in PEP carboxylase
B

Lack RuBisCO
C

Lack both RuBisCO and PEP carboxylase
D

Are rich in RuBisCO

Solution

Bundle sheath cells lack PEPcase enzymes in their cytoplasm but their chloroplasts contain RuBisCO and other Calvin cycle enzymes.
Mesophyll cells contain PEPcase enzymes in their cytoplasm but their chloroplasts lack RuBisCO and other Calvin cycle enzymes.

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