A. Describe the role of both the light AND the DCPIP in this experiment. B. Calculate the rate of photosynthesis( absorption units/min) for sample 1 and 6 A buffered solution containing chloroplasts and DCPIP was divided equally among six identical samples. Thesamples were placed at various distances from a lamp, and then all samples were exposed to white light from thelamp for 60 minutes at room temperature. Sample 3 was wrapped in foil to prevent any light from reaching thesolution. At 20-minute intervals, the photosynthetic activity in each sample was determined by measuring therelative absorbance of 605 nm light. See the results of the experiment belowRelative Absorbance of 605 nm Light (arbitrary units)Sample0 min60 minDistancefrom lamp(cm)20 min40 min1150.890.610.340.042300.900.670.410.143*300.880.870.860.874450.860.690.470.265600.920.750.590.416750.880.790.710.58*Wrapped in foilLO

Answered: A. Describe the role of both the light…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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A. Describe the role of both the light AND the DCPIP in this experiment.

B. Calculate the rate of photosynthesis( absorption units/min) for sample 1 and 6

A buffered solution containing chloroplasts and DCPIP was divided equally among six identical samples. The
samples were placed at various distances from a lamp, and then all samples were exposed to white light from the
lamp for 60 minutes at room temperature. Sample 3 was wrapped in foil to prevent any light from reaching the
solution. At 20-minute intervals, the photosynthetic activity in each sample was determined by measuring the
relative absorbance of 605 nm light. See the results of the experiment below
Relative Absorbance of 605 nm Light (arbitrary units)
Sample
0 min
60 min
Distance
from lamp
(cm)
20 min
40 min
1
15
0.89
0.61
0.34
0.04
2
30
0.90
0.67
0.41
0.14
3*
30
0.88
0.87
0.86
0.87
4
45
0.86
0.69
0.47
0.26
5
60
0.92
0.75
0.59
0.41
6
75
0.88
0.79
0.71
0.58
*Wrapped in foil
LO

Expert Solution

Step 1

Light is one of the main raw materials in the process of photosynthesis. All photosynthetic organisms contain photosynthetic pigments that can absorb light such as chlorophyll "a" and it absorbs light in violet-blue and reddish orange-red wavelengths. The amount of light absorbed by the pigments determines the rate of photosynthesis plants.

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