To Identify the Molecule That First Reacts with CO₂ in the Light-Independent

question 41

Multiple Choice

To identify the molecule that first reacts with CO₂ in the light-independent reactions of photosynthesis, Calvin and Benson manipulated the carbon-fixation cycle by either elminating CO₂ or light from cultures of photosynthetic algae. Which of the following statements best predicts the immediate effects of these manipulations on the concentration of the molecule that initially reacts with CO₂?

• A) The concentration would decrease when either the CO₂ or light is eliminated.
• B) The concentration would increase when either the CO₂ or light is eliminated.
• C) The concentration would decrease when the CO₂ is eliminated, but increase when the light is eliminated.
• D) The concentration would increase when the CO₂ is eliminated, but decrease when the light is eliminated.

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Definitions:

Intentions

Plans or objectives that one intends to accomplish or achieve, reflecting a person's motivation and purpose.

Consequences

The outcomes or results that follow directly from actions or decisions.

Racial Categories

Classifications of humans into groups based on physical traits, ancestry, genetics, or social relations, often used for demographic purposes but critiqued for reinforcing stereotypes.

Biracial

Refers to individuals or groups composed of or pertaining to two different racial lineages.