In nature, only about 1% to 2% of the sun's usable energy is converted into chemical energy and is stored in carbohydrate. Which of the following contribute to this apparent inefficiency of the photosynthetic process?
A)PS II and PSI are not completely synchronized because they absorb light energy at slightly different wavelengths.
B)Rubisco is able to use both carbon dioxide and oxygen as a substrate.
C)The presence of accessory pigments in chloroplasts decreases the amount of light energy available to excite chlorophyll molecules.

Question

Quizplus · Accepted Answer

Rubisco is the enzyme responsible for fixing carbon dioxide during the light-independent reactions of photosynthesis, but it can also mistakenly react with oxygen instead. This process, called photorespiration, results in the loss of energy and reduces the efficiency of photosynthesis.

In Nature, Only About 1% to 2% of the Sun's