01:119:115 Lecture Notes - Lecture 9: P700, Rubisco, P680
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Chlorophyll is a pigment that absorbs specific wavelengths of light, and the absorption of that light leads to the passage of electrons to a higher energy state, where chemical energy can then be harvested from them. You would expect that a plant exposed to which color of light would produce the most photosynthesis?
green |
orange |
yellow |
blue |
Which color of light would you expect chlorophyll to absorb the least?
green |
red |
yellow |
blue |
Most plants are green because....
chlorophyll absorbs green light well |
chlorophyll does not absorb green light well |
chlorophyll reflects green light well |
both of the last two answers are correct |
Thinking about the gases involved in respiration and photosynthesis, during the day, a plant is producing____ from respiration and releasing_____ from photosynthesis. But at night, a plant is only producing_______ from respiration.(spell your answers out completely).
Plants perform cellular respiration to produce.......
ATP |
NADPH |
sugar |
oxygen |
Which of the following is true about plants and cellular respiration?
plants perform cellular respiration only during the night |
plants perform cellular respiration only during the day |
plants perform cellular respiration during the night and day |
plants do not perform cellular respiration |
Which of the following is true regarding plants and photosynthesis?
plants perform photosynthesis only during the night |
plants perform photosynthesis only during the day |
plants perform photosynthesis during the night and day |
plants do not perform photosynthesis |
Is it possible for this plant to consistently do more cellular respiration than photosynthesis?
yes, plants use excess ATP for growth |
yes, but only during winter months |
not today, but fossil records shows they did in the past |
no, plants can't consume food faster than they make it |
Photosynthesis Lab Report
- Plant Structure and Function
- Through the process called __________ plants convert lightenergy into
__________ energy. Record your answerbelow.
- In which structure of the plant does photosynthesis occur?
- What is the difference between xylem and phloem?
- Based on lab, Exercise 1, what is the name and function of thestructure labeled with the letter âHâ?
- Chloroplast
- 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.
- What part of the process of photosynthesis occurs in thethylakoid compartment?
- What is the name and function of the structure labeled with theletter âEâ in Exercise 2?
- Photosynthetic Products
- What are the three products of photosynthesis?
- What happens to the glucose that is not metabolizedimmediately?
- In the test for starch, which tube demonstrated a positive testfor starch? How do you know?
- Based on Lab, Exercise 3 explain why part of the leaf was amberin color.
- Light Absorption
- What pigment is used by plants to absorb light?
- In the video demonstration in Exercise 4 what happens to thelight spectrum when a green filter is placed in front of the lightsource?
- In step 3 of Exercise 4, which color was not absorbed by thespinach pigments?
- Photosynthetic Pigments
- What process is used in Exercise 5 to separate the plantpigments?
- Look at the chromatogram results in Exercise 5. What color isreflected by chlorophyll a?
- Which pigment reflected an orange color?
VI. Effect of Light and Temperature onPhotosynthesis
- What was the conclusion of Blackmanâs first experiment on theeffect of light on photosynthesis?
- In his second experiment, what effect did increasingtemperature have on the rate of photosynthesis?
- Record the data from Exercise 6 below.
Lamp Distance | Temperature | Ave Bubble/min |
75 cm | ||
50 cm | ||
25 cm |
- In the experiment in Exercise 6, what conclusion can be drawnabout the effect of light and temperature on rate ofphotosynthesis?
Summary Questions
- Why do heterotrophs depend on autotrophs?
- Name two reactants necessary for photosynthesis to occur.
- How would the process of photosynthesis be affected if a planthad no stomata?
- What tool is used to separate white light into differentwavelengths of color?
- Explain why we see the color green on the leaves ofplants.
- What color is absorbed the least by the petals on asunflower?
- Photosynthesis consists of two phases. Which phase would beleast affected by living in an area where there are shorter daysand long periods of darkness?
- How could air pollution affect food production and the priceyou pay for food at the supermarket?