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

question 128

Multiple Choice

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.