The Phosphorus Cycle Differs from the Carbon Cycle in That

question 73

Multiple Choice

The phosphorus cycle differs from the carbon cycle in that:

• A) there is little or no human impact on the phosphorus cycle.
• B) phosphorus is not a critical component of living organisms.
• C) the hydrosphere plays a role in the phosphorus cycle.
• D) the atmosphere does not contribute to the phosphorus cycle.
• E) plants play a role in the carbon cycle, but have no role in the phosphorus cycle.

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Definitions:

NADPH

Nicotinamide adenine dinucleotide phosphate, a coenzyme involved in anabolic reactions, such as lipid and nucleic acid synthesis, and the antioxidant defense system.

Electrons Needed

Refers to the requirement of electrons in various chemical reactions and processes, such as those in cellular respiration and photosynthesis.

NADPH Formed

The production of Nicotinamide Adenine Dinucleotide Phosphate, a critical cofactor in anabolic reactions, during cellular metabolic processes.

Thylakoid Lumen

The inner space of the thylakoids, where the light-dependent reactions of photosynthesis occur.