Question 37

Plants would not be able to capture light energy effectively

Without chlorophyll, plants would struggle to capture light energy, which is essential for the process of photosynthesis. Chlorophyll is the pigment that absorbs sunlight, and its absence would hinder the plant's ability to initiate the photosynthetic reactions necessary for energy production.

A) The rate of photosynthesis would increase

This option is incorrect because the absence of chlorophyll would not lead to an increase in the rate of photosynthesis. In fact, without chlorophyll, the process would be severely impaired as there would be no means to capture light energy, which is crucial for photosynthesis.

B) Plants would not be able to capture light energy effectively

This option is correct because chlorophyll is essential for absorbing sunlight. Without it, plants would be unable to perform photosynthesis, leading to a lack of energy production and growth. This would significantly affect their survival and the ecosystem as a whole.

C) Plants would produce more oxygen

This choice is incorrect as the production of oxygen is a byproduct of photosynthesis. If chlorophyll is absent, the photosynthetic process would not occur effectively, resulting in reduced or no oxygen production.

D) The Calvin cycle would be more efficient

This option is also incorrect. The Calvin cycle relies on the products of the light-dependent reactions, which require chlorophyll. Without chlorophyll, the initial reactions needed to fuel the Calvin cycle would not take place, making it less efficient rather than more.

Conclusion

The absence of chlorophyll directly impacts a plant's ability to capture light energy, which is fundamental for the process of photosynthesis. As a result, the correct answer, that plants would not be able to capture light energy effectively, highlights the critical role chlorophyll plays in sustaining plant life and the overall health of the ecosystem. All other options fail because they ignore the essential function of chlorophyll in energy conversion and oxygen production.