Why are bubbles counted in this experiment, and what do they represent? make a line graph showing the difference in the number of oxygen gas bubbles released by the plant under different light intensities and water temperatures. Which light intensity and water temperature caused the plant to produce the most amount oxygen gas during the process of photosynthesis? Why Which light intensity and water temperature caused the plant to produce the least amount oxygen gas during the process of photosynthesis? Why?

Why are bubbles counted in this experiment, and what do they represent? make a line graph showing the difference in the number of oxygen gas bubbles released by the plant under different light intensities and water temperatures. Which light intensity and water temperature caused the plant to produce the most amount oxygen gas during the process of photosynthesis? Why Which light intensity and water temperature caused the plant to produce the least amount oxygen gas during the process of photosynthesis? Why?

Biomedical Instrumentation Systems

1st Edition

ISBN:9781133478294

Author:Chatterjee

Publisher:Chatterjee

Chapter16: Fiber Optics And Lasers In Bioinstrumentation

Section: Chapter Questions

Problem 7P

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The following results were obtained for the experiment: FLASK # LIGHT EXPOSURE OXYGEN GAS PRODUCED (mL) 1 Blue 2.0 Green 0.5 Yellow 0.5 4 Red 1.0 Covered with tin foil. 0 Based on the results of the experiment, which wavelengths of light does the plant use for photosynthesis? 2 3
Students filled three identical flasks with water and placed elodea, a type of aquatic plant, in each flask. The students adjusted the light intensity that each plant received by wrapping some of the flasks in either screen mesh or foil. The screen mesh allowed only some light to pass through, and the foil allowed no light to pass through. The students recorded the amount of dissolved oxygen, in milligrams per liter, in each flask at the start of the experiment and after twelve hours of light exposure. The data are shown in the table. Drag a label corresponding to a treatment to the correct column header in the table to indicate the beaker from which each piece of data was most likely collected. Light Source Oxygen Sensor Screen Mesh No Covering Screen Foil
An experiment was done to determine how color of light and distance affects photosynthetic activity of the pond weed. Pond weed was placed in a test tube containing a solution of sodium hydrogen carbonate, and had its end cut; light was placed 50 cm away and four colors were tested (clear, red, blue, and green). After placing the light, the pondweed was given a certain amount of time to adjust before counting the bubbles, bubbles were counted for 1, 3, and 5 minutes. Only the bubbles that came out of the cut end was counted to represent the rate of photosynthesis. Below is the tabulated results. What are the possible factors or errors that could have affected clear/white light to have lower photosynthetic activity? In theory this should have the highest rate.
A plant would be grown in a room with a heater maintaining a temperature of 35 degrees, and another plant would be grown in a room at 21 degrees. Among LED, incandescent, and CFL. What light source would be best for plants to grow indoor? Why
OO O O 5 TIME Remaning water. Below is a table showing data from an experiment in which leave disks were exposed to different colored light. The times it took for the leave disks to float to the surface are recorded under each light color column. The numbers in the left column indicate 10 groups conducted the experiment. Diagram 5: Experimental Set-Up for leaf discs under various colors of light Light color: Green Blue Plain Red Data collection and processing Recorded times for leaf dises ni sing for different colors - Trial I (seconds) (+2 Seconds ) Red Plain 80 170 209 172 183 333 40 80 89 97 102 121 124 138 152 162 377 184 4 380 462 398 167 510 6 516 380 546 381 565 642 820 899 381 558 9 10 A Table 1: This is the time that it took for the first 10 leaf discs to rise when exposed to light while submerged in water. (One of 3 trials) 612 604 1005 S58 Look at the data for leaf disk #2 in the Table 1. Under which color of light would the least amount of H* be available to pass through…
Absorption of photons by the light capturing center is not directly coupled with evolving of oxygen from water. O True False
Test-tube Beaker Funnel Water plants In this setup, the rate of the reaction can be increased by O adding sodium bicarbonate only increasing the light intensity only O adding more water to the beaker O adding sodium bicarbonate and increasing the light intensity decreasing the light intensity
To ensure that the plant was kept at a constant temperature at each light intensity in this experiment: Select one or more: a. the temperature of the room was adjusted to keep the tube of Elodea submerged in water at a constant temperature with a thermometer inside the tube b. the tube containing Elodea submerged in water was surrounded by light on all sides with a thermometer inside the tube c. the tube containing Elodea submerged in water was placed in a water bath with a thermometer in the water bath
Leaf Sample Type Illumination Level Oxygen Concentration Change Data (ppm) Elapsed Time (s) Oxygen Change Rate (ppm/s) Sun- Adapted 100% 22.94 40.0 s 0.5735 Shade-Adapted 100% 13.92 40.0 s 0.348 Leaf Sample Type Illumination Level Carbon Dioxide Concentration Change Data (ppm) Elapsed Time (s) Carbon Dioxide Change Rate (ppm/s) Sun- Adapted 100% -22.94 40.0 s -0.5735 Shade-Adapted 100% -13.92 40.0 s -0.348 In procedure I, the oxygen concentration changes differed between sun-adapted leaves and shade-adapted leaves. Can chlorophyll concentrations alone explain the differences seen between the two leaf types? Explain
Leaf Sample Type Illumination Level Oxygen Concentration Change Data (ppm) Elapsed Time (s) Oxygen Change Rate (ppm/s) Sun- Adapted 0% -15.05 40.0s -0.37625 Shade-Adapted 0% -9.03 40.0s -0.22575 Leaf Sample Type Illumination Level Carbon Dioxide Concentration Change Data (ppm) Elapsed Time (s) Carbon Dioxide Change Rate (ppm/s) Sun- Adapted 0% 15.05 40.0s 0.37625 Shade-Adapted 0% 9.03 40.0s 0.22575 Using the results for the change in carbon dioxide concentration in Procedure II as a reference, compare the rates of cellular respiration for sun-adapted versus shade-adapted leaves. What are the biological principles/bases underlying this comparison.
Which of the following are the inputs of the light reactions? Choose all that apply. carbon dioxide gas O NADP+ ADP+P oxygen gas АТР water O NADPH sunlight
An experiment was conducted to demonstrate that chlorophyll is essential for photosynthesis. The procedure followed is given below: • A potted variegated plant was destarched. • Variegated leaves have green parts (where the cells contain chlorophyll) and white parts (where there is no chlorophyll). • A starch test was done on a leaf. • The potted plant was exposed to bright sunlight for 4–5 hours. • After 5 hours, a leaf was removed and tested for starch. How was the potted plant destarched? Explain why all the starch has disappeared during the process Mentioned in QUESTION 1. Describe the steps in the correct sequence that were followed during the starch test. Explain ONE safety precaution that should be taken when testing for starch. Draw a labelled leaf and indicate the colour change in the green and white parts of the leaf, after the second starch test.

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	10°C water	25 °C water	40 °C water
Lumes	number of bubbles released	number of bubbles released	number of bubbles released
0	3	7	3
1000	11	23	11
2000	17	35	17
3000	19	39	19