Question

By performing photosynthesis, plants create everything they need to build all biomolecules. Is this true? Why or why not?(1 point)
Responses

This is not true because plants need to sequester nitrogen from the soil to build amino acids.
This is not true because plants need to sequester nitrogen from the soil to build amino acids.

This is true because photosynthesis produces glucose, which has carbon, hydrogen and oxygen—the building blocks for all biomolecules.
This is true because photosynthesis produces glucose, which has carbon, hydrogen and oxygen—the building blocks for all biomolecules.

This is true because photosynthesis produces glucose, and plants only need sugars, not amino acids or fatty acids.
This is true because photosynthesis produces glucose, and plants only need sugars, not amino acids or fatty acids.

This is not true because plants need to perform cellular respiration to break down the glucose into carbon, hydrogen, and oxygen.

Answer 1

This is not true because plants need to sequester nitrogen from the soil to build amino acids.

Explanation: Photosynthesis fixes carbon (and provides energy) to make sugars and carbon skeletons, but it does not provide elements like nitrogen, phosphorus, sulfur, and various micronutrients. Nitrogen (usually taken up as nitrate or ammonium) is essential for amino acids and nucleotides, so plants must obtain it from the soil or from symbiotic N-fixing microbes.