Which one of the following statements is correct?
In photosynthesis by green plants, carbon dioxide is used for making carbohydrate.
During photosynthesis, plants use oxygen for making carbohydrate.
The carbohydrate generated by plants comes from soil.
The carbohydrate generated by plants comes from urea.
Answer is Wrong!
Answer is Right!
This question was previously asked in
UPSC CAPF – 2018
Let’s evaluate the other options:
B) Oxygen is produced as a byproduct during photosynthesis, not used to make carbohydrate.
C) While water and minerals essential for plant growth come from the soil, the carbon atoms that form the backbone of the carbohydrate molecule come from atmospheric carbon dioxide.
D) Urea is a nitrogenous compound used as a fertilizer to provide nitrogen for plant growth. Nitrogen is essential for synthesizing proteins and nucleic acids, but the carbon backbone of carbohydrates comes from CO₂.
Therefore, the correct statement is that carbon dioxide is used for making carbohydrate in photosynthesis.