Question

Photosynthesis in $C _ { 4 }$plants is relatively less limited by atmospheric $\mathrm { CO } _ { 2 }$ levels because

• A. Four carbon acids are the primary initial $\mathrm { CO } _ { 2 }$ fixation products
• B. The primary fixation of $\mathrm { CO } _ { 2 }$ is mediated via PEP carboxylase
• C. Effective pumping of $\mathrm { CO } _ { 2 }$ into bundlesheath cells
• D. Rubisco in $C _ { 4 }$plants has higher affinity for $\mathrm { CO } _ { 2 }$

Answer 1

Answer: (B)

The primary fixation of $\mathrm { CO } _ { 2 }$ is mediated via PEP carboxylase