I am doing an ap biology lab on plant photosynthesis. It's specifically lab # 4 on plant pigments and photosynthesis and it's on question # 8 on Exercise 4B: Photosynthesis/ The Light Reaction.

Identify the function of each of the cuvettes.

I already have gone to the lab bench website where it explains the experiment but it doesn't give the answer to this question.

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  1. The objective of the lab is to see what is needed for photosynthesis to occur. Curvette 2 has everything we think it needs except light. So it is testing if light is necessary. Curvette 3 has everything we think is needed, so we are testing to see if that is true. Curvette four has boiled chloroplasts, so it is testing to see if the chloroplasts actually have to be biologically active to function. Curvette five is to see if any type of chloroplast are needed at all. Curvette 1 is a blank to set the spec at zero, so nothing except DPIP affects the transmittence. Next time you could talk to your teacher instead of looking for answers from some ramdon teen on-line. Who knows, I might be full of it.

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  2. Look in the Cliff Notes AP Biology book

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  3. What reasons can you give for the difference in the percent transmittance between the live chloroplasts that were incubated in the light and those that were kept in the dark?

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  4. I found that each cuvette contained equal amounts of photosynthesis when the ultra-fertilizer is added to the solution, thus creating super-photosynthesis. Without the fertilizer only regular photosynthesis would occur and then nothing happens because no one really cares about regular photosynthesis anyways. You feels me?

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  5. Cuvette 1: Control factor
    Cuvette 2: Bad conductor of photosynthesis
    Cuvette 3: Good conductor of photosynthesis
    Cuvette 4: Denaturation
    Cuvette 5: Control Factor

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