Which of the Following Is True Regarding CO₂ Fixation in Plants

question 36

Multiple Choice

Which of the following is true regarding CO₂ fixation in plants?

• A) CAM plants work by storing carbon dioxide at night in the form of oxaloacetate
• B) The RUBISCO enzyme has a higher affinity for oxygen than for CO₂, making it very difficult to effectively fix CO₂
• C) At high temperatures, C4 plants are more efficient than C3 plants because they are able to fix CO₂ with minimal photorespiration
• D) The RUBISCO enzyme contains a Mg²⁺ that acts as a Lewis base, binding to CO₂ and making it more susceptible to nucleophilic attack
• E) None of the above are true

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Definitions:

Frequency Theory

A theory regarding how sounds are perceived, suggesting that the frequency of an auditory stimulus is directly related to the frequency of neural impulses sent to the brain.

Neurons

The fundamental units of the brain and nervous system, responsible for receiving sensory input, sending motor commands to muscles, and processing and transmitting neural impulses throughout the body.

Middle Ear

The part of the ear between the eardrum and the oval window that contains the three small bones (ossicles) involved in transmitting sound to the inner ear.

Hammer, Anvil, Stirrup

Three tiny bones in the middle ear that play a crucial role in the process of hearing.