How Does Carbon Fixation Differ Between C₃ and C₄ Plants

question 36

Multiple Choice

How does carbon fixation differ between C₃ and C₄ plants?

• A)C₄ plants undergo carbon fixation by carboxylation of a four-carbon substrate (oxaloacetate),while in C₃ plants,a three-carbon compound (phosphoglycerate)is carboxylated.
• B)Both C₃ and C₄ plants involve carboxylation of ribulose-1,5-bisphosphate by rubisco;but in C₃,the first stable intermediate is 3-phosphoglycerate,and in C₄,it is oxaloacetate.
• C)C₃ plants don't undergo photorespiration,but C₄ plants do.
• D)Rubisco is the primary enzyme that catalyzes carbon fixation in C₃ plants,and phosphoenolpyruvate carboxylase can catalyze carbon fixation in C₄ plants.

---

Definitions:

Style

The distinctive manner of expression in writing, speech, or artwork that characterizes an individual, period, school, or nation.

Terminology

The set of special words or expressions that are used in a particular profession, domain, or field of study.

Mechanics

The rules and conventions governing the technical aspects of writing, including spelling, punctuation, and capitalization.

Proofreading

The process of reviewing text to correct typographical, grammatical, spelling, and punctuation errors to ensure accuracy and coherence.