Rio Salado BIO101 lab 5

1. a. What is the name of the pigment that
captures light? (2 points) b. Why does the pigment appear green? (2
points)–Answer below:

2. List two variables besides the
wavelength (color) of light which might affect the rate of food production in
plants. (4 points)a.b.–Answer below:

Why is chlorophyll important for all biological life? (5 points)–Answer below:
4. a. In Part I of the procedure, what is
the name of the indicator used to identify the presence of CO2? (2 points) b. What color did the indicator turn after
blowing air into the water through the straw? (2 points)–Answer below:
5. a. What color did the indicator turn
after the tube was placed under a light source for 30 minutes? (2 points) b. Why did this occur? (3 points)–Answer

6. List the four common pigments found in
plants and their functions. (4 points)a.b.c.d.–Answer below:

7. If the Rf factor of a pigment is .8400
and the distance that the solvent traveled is 12 cm, how far did the pigment
travel? (5 points)–Answer below:

8. List the pigments extracted from the
spinach leaves and their corresponding Rf values, from lowest to highest Rf
value (4 points). a. pigment, Rf valueb.
pigment, Rf valuec. pigment, Rf valued. pigment, Rf value–Answer below:
9. Based on the results, which pigment has
the highest molecular weight? (5 points)–Answer below:

10. From the chromatography lab, which
pigments were soluble in the acetone? (5 points)–Answer below:

11. The earth’s early atmosphere did not
contain oxygen. This changed dramatically once the early cells underwent
photosynthesis. Explain why photosynthesis could have occurred in such an
atmosphere and how it eventually affected the evolution of other organisms. (10
points)–Answer below:

12. a. In reviewing the data from the floating
disk experiment, which factor had a greater impact on the rate of
photosynthesis (light intensity or concentration of carbon dioxide)? (5 points)b. How did the student come to this
conclusion? (5 points)–Answer below:
13. Based on the data presented in the
table, which two containers could be correctly used to compare the rate of
photosynthesis at two different light intensities? (5 points)a. 1 and 2b. 2 and
3c. 1 and 5d. 5 and 6e. 4 and 5–Answer below

14. Compare Containers 1 and 2. What independent variable is tested by this
comparison? (5 points)a. Kind of plantb. Height of plantc. Light intensityd.
Distance from light sourcee. Light source–Answer below:

15. Which container had the slowest rate of
photosynthesis? (5 points)a. 1 b.
2 c. 3 d. 4 e. 5 f. 6–Answer below

16. (Application) How might the information
gained from this lab pertaining to photosynthesis and pigments be useful to the
student or how can the student apply this knowledge to everyday life as a
non-scientist? (20 points)–Answer below:

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