RuBP carboxylase (Rubisco)
A) captures CO2 from the atmosphere and converts it to two 3-carbon sugars.
B) transports H+ across the chloroplast membrane in chemiosmosis.
C) combines with CO2 to form oxaloacetate in C4 photosynthesis.
D) releases a molecule of CO2 as it is converted to pyruvate.
Answer: A) captures CO2 from the atmosphere and converts it to two 3-carbon sugars.