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Effect of different colors of light on the rate of photosynthesis.

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Photosynthesis team computer science major requirements ualbany.
In this simulation lab you will be looking at the production of oxygen as a plant photosynthesizes.

In this experiment we were told that we would be measuring the rate of photosynthesis.

The word equation for photosynthesis is: Light [IMAGE]Carbon Dioxide + Water Glucose + Oxygen Chlorophyll Although most of the glucose produced is converted into insoluble starch for storage in the stem, leaves or roots, some is used immediately by the plant to provide via respiration....

Effects of different colors of light on the photosynthesis rate.

Photosynthesis need light to work, so light therefore should speed up the rate of photosynthesis.

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).

I believe this will happen because when the light source is nearer to the plant more of the plants surface area is coming in to contact with the light from the desk lamp therefore more photosynthesis will occur which will mean more oxygen will be produced which will create more bubbles....

Oxygen production is used to measure the rate of photosynthesis.

Aim: To see if raising the light intensity increases the rate of photosynthesis.

Hypothesis:Photosynthesis is a process by which green plants and certain other organisms use the energy of light to convert carbon dioxide and water into the simple sugar glucose....

To demonstrate CO uptake we will use ourold friend This time we will use an indicator, phenolred, to demonstrate a change in pH resulting from photosyntheticCO uptake. Phenol red(phenol-sulfonphthalein) turns yellow at pH 7. We will place in a dilute solution of phenol redacidified with carbonic acid, and watch it raise the pH of thesolution.

Prediction:I predict that raising the light intensity will increase the rate of photosynthesis.
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Measure of Photosynthetic Rate In Spinach Leaf Disks

and female 104 weeks; group size; or 250 mg/kg evidence of slight liver damage at 250 (1986b) 125 m, 100 f (controls) per day mg/kg per day 200 m, 100 f (60 mg/kg) 100 m, 50 f (125 mg/kg) 100 m, 50 f (185 mg/kg) 125 m, 50 f (250 mg/kg) Table 22 (Cont'd) Species Strain/type Route of Doses Observations Reference administration/protocol/ group/size Mouse Swiss, male and Gavage in olive oil for 64 0, 100 or Decrease in body weight in exposed Maltoni et female weeks 500 mg/kg males and females after 36-40 weeks; al, (1988) 50 animals/sex/dose per day dose-related increase in pulmonary 60 animals/sex/controls tumours in males - not significant without considering mortality rate; significant (p<0.05) taking into account the mortality rate; no treatment-related increase in the percentage of animals bearing benign and malignant tumours, or of animals bearing malignant tumours, or of the number of total malignant tumours per 100 animals 8.7.2.2 Mouse Groups of male and female B6C3F1 mice (7 weeks old) received methylene chloride in the drinking-water for 104 weeks at levels of 0 (control groups 60/65 males, 50/50 females), 60 (200 males, 100 females), 125 (100 males, 50 females), 185 (100 males, 50 females) or 250 (125 males, 50 females) mg/kg per day.

V. Designing an experiment to study some aspect of photosynthesis.

typhimurium or 750/µl per of Aroclor pretreated rats; dose- (1980) 9 litre desiccator related increase in the mutation rate, (0-293 mg/m3) with an approximate 10-fold increase for 8 h for both strains at the highest dose used; the presence of S9 resulted in a slightly higher mutation rate Table 18 (Cont'd) Assay Strain/type S9 Dose Resulta Observations Reference activation Salmonella TA1535, Not stated +ve Same study, but no data were given typhimurium TA1537, for the strains studied; there is no TA1538 evidence for an independent confirmatory experiment Salmonella TA1535, 0.5 ml/desiccator -ve Vapour phase protocol; result Nestmann et al.

The photosynthesis of the plants was inhibited.

(1982) Salmonella TA100 ±S9 0 or 1 ml/9 litre +ve Study summarized in review, original Simmon & typhimurium desiccator data were not available; vapour Kauhanen (1978) (approx 390 mg phase control; S9) from livers of per m3) for 6.5 Aroclor-pretreated rats; addition of or 8 h S9 increased the mutation rate 1.5 fold; no further details are available Salmonella TA98, TA100 ±S9 0,125, 250, 500 +ve Vapour phase control; S9 from livers Rapson et al.

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typhimurium 201 000 mg per m3 from the livers of phenobarbital (1978) (5 concentrations) pretreated rats; a dose-related for 48 h increase of up to 5-8 fold (mean value for 3 experiments) was seen, slightly higher in the presence of S9; toxicity was noted at the highest dose level Table 18 (Cont'd) Assay Strain/type S9 Dose Resulta Observations Reference activation Salmonella TA100 Not stated Vapour phase protocol; time-course Jongen (1984) typhimurium study to evaluate the most appropriate exposure time for maximum differentiation of the methylene chloride induced reversion rates in the presence and absence of a metabolic activation system; the maximum differentation was obtained following 4-6 h exposure, and, consequently, an exposure time of 6 h was used by these workers in the study of Jongen et al.

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