s. and are Using data from your results, speculate about the roles of these pigm

Question

s. and are Using data from your results, speculate about the roles of these pigments in Reviewing Your Knowledge 1. Using your previous knowledge of photosynthesis and the resu from today's exercises, the origin, or fate ofeach factor involved role, in the process of photosynthesis. 2. A pigment solution contains compound A with 4polar groups and compound B with 2 polar groups. You plan to separate these com- pounds using paper chromatography with a nonpolar solvent. Predict the location of the two bands relative to the solvent front. Explain your Applying Your Knowledge 1. Rice is the number one food crop, feeding over 50% of the world's pop- ulation. Some scientists estimate that at the current rate of population growth, rice farmers will need to produce 50% more rice per hectare by 2050. Researchers are working to increase the photosynthetic efficiency of rice to meet the concern over food shortage. Using your knowledge of suggest features of the plant and photosynthetic process that could be modified. Think creatively! 2. In response to shortened day length and cool fall, many trees begin a period of when the breakdown of chlorophyll exceeds chlorophyll production. The leaves of these trees appear to change to yellow and orange. Using your knowledge of photo synthetic pigments, explain the source of these yellow-orange hues

Explanation / Answer

Ans: chlorophyll b and carotenoids absorb light in a range that lies beyond what is absorbed by chlorophyll a and hence the light absorption during photosynthesis. Both is these molecules are part of antenna complex and absorb light of different wavelengths falling on the reaction center and increasing the absorbance and rate of photosynthesis thereof.

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