5. What is the source of the electrons that will reduce DPIP?

Green plants and other photosynthetic organisms trap light energy and synthesize carbohydrate molecules via metabolic processes collectively called photosynthesis.

4. What molecule found in chloroplasts does DPIP

Introduction: "Photosynthesis is the conversion of light energy to chemical energy that is stored in glucose or other organic compounds; it occurs in plants, algae, and certain prokaryotes" (Campbell, G-16).

7. What is the effect of darkness on the reduction of DPIP? Explain.

This was done by separating the photosynthetic pigments (chlorophyll a, chlorophyll b, carotene and xanthophylls) from one another using paper chromatography.


I think this because the plant may use up all of the carbon dioxide (Sodium hydro carbonate) and the plant can have as much light as it needs but if it does not have any carbon dioxide it will not be able to photosynthesise....

Plant Pigments and Photosynthesis - Angelfire

What is the source of electrons that will reduce DPIP?

The electrons come from the photolysis of water.
Photoysis- chemical process by which molecules are broken into smaller units through the absorbtion of light.

Plant Pigments and Photosynthesis

This trend is demonstrated in the data – the unboiled chloroplasts left in the dark only increased their percentage of light transmission by 8.5% over fifteen minutes, while the unboiled chloroplasts left in the light increased their percentage of light transmission by 56.9%.

AP Biology Lab 4- Plant pigments and Photosynthesis.

This trend is demonstrated dramatically in the slopes of the trendlines for the different samples of chloroplasts where time is graphed against the percentage of light transmitted – for example, on the graph of light transmission for Period 4, the slope is 89.8% greater for the unboiled/light chloroplasts than for any other chloroplast mixture.

What is DPIP and what does it have to do with Photosynthesis?

This process is also affected by the temperature surrounding the plant (the species of plant we experimented with, pond weed, photosynthesised best at around 20 degrees centigrade.) Light, temperature & CO2 are known as limiting factors, and each is as important as the next in photosynthes...

What molecule found in chloroplasts does DPIP …

Variables: The variables that might affect the rate of photosynthesis in this experiment are: Temperature: When the temperature rises so does the rate of photosynthesis; this is because as the temperature around the plant rises the enzymes controlling photosynthesis inside the chloroplasts heat up and start moving around faster, the fast moving molecules collide with other fast moving enzymes causing them to react....