Question

Photosynthesis Lab Report

1. Plant Structure and Function

1. Through the process called __________ plants convert lightenergy into

__________ energy. Record your answerbelow.

2. In which structure of the plant does photosynthesis occur?

3. What is the difference between xylem and phloem?

4. Based on lab, Exercise 1, what is the name and function of thestructure labeled with the letter “H”?

2. Chloroplast

1. Based on Lab, Exercise 2, draw and label each part of thechloroplast. Sign, date and prepare an image of your drawing andinclude it with this lab report.

2. What part of the process of photosynthesis occurs in thethylakoid compartment?

3. What is the name and function of the structure labeled with theletter “E” in Exercise 2?

3. Photosynthetic Products

1. What are the three products of photosynthesis?

2. What happens to the glucose that is not metabolizedimmediately?

3. In the test for starch, which tube demonstrated a positive testfor starch? How do you know?

4. Based on Lab, Exercise 3 explain why part of the leaf was amberin color.

4. Light Absorption

1. What pigment is used by plants to absorb light?

2. In the video demonstration in Exercise 4 what happens to thelight spectrum when a green filter is placed in front of the lightsource?

3. In step 3 of Exercise 4, which color was not absorbed by thespinach pigments?

5. Photosynthetic Pigments

1. What process is used in Exercise 5 to separate the plantpigments?

2. Look at the chromatogram results in Exercise 5. What color isreflected by chlorophyll a?

3. Which pigment reflected an orange color?

VI. Effect of Light and Temperature onPhotosynthesis

1. What was the conclusion of Blackman’s first experiment on theeffect of light on photosynthesis?

2. In his second experiment, what effect did increasingtemperature have on the rate of photosynthesis?

3. Record the data from Exercise 6 below.

Lamp Distance	Temperature	Ave Bubble/min
75 cm
50 cm
25 cm

4. In the experiment in Exercise 6, what conclusion can be drawnabout the effect of light and temperature on rate ofphotosynthesis?

Summary Questions

1. Why do heterotrophs depend on autotrophs?

2. Name two reactants necessary for photosynthesis to occur.

3. How would the process of photosynthesis be affected if a planthad no stomata?

4. What tool is used to separate white light into differentwavelengths of color?

5. Explain why we see the color green on the leaves ofplants.

6. What color is absorbed the least by the petals on asunflower?

7. Photosynthesis consists of two phases. Which phase would beleast affected by living in an area where there are shorter daysand long periods of darkness?

8. How could air pollution affect food production and the priceyou pay for food at the supermarket?