Photosynthesis 3

In eukaryotic organisms, the chemical reactions associated with the chemical equation in this passage typically occur within which of the following structures? a. Golgi b. Chloroplasts c. Mitochondria d. Nuclei e. Lysosome Check

Chloroplasts

The Calvin cycle Select one: a. completes the process of photosynthesis. b. is another name for photosynthesis. c. converts chemical energy into light energy. d. consumes water to produce energy.

a. completes the process of photosynthesis.

Photosynthetic activity is often measured in terms of the amount of O2 released per hour mainly because O2 Select one: a. is an easily measured product of photosynthesis. b. is constantly released by plants. c. is the principal product of photosynthesis. d. combines readily with all organisms.

a. is an easily measured product of photosynthesis. Correct

Photosynthesis produces enormous amounts of Select one: a. oxygen. b. all of the above. c. water. d. carbon dioxide.

a. oxygen. Correct

Most complex organisms (such as plants, animals, and fungi) are either Select one: a. photoautotrophs or heterotrophs. b. heterotrophs or chemoautotrophs. c. heterotrophs or herbivores. d. photoautotrophs or chemoautotrophs.

a. photoautotrophs or heterotrophs. Correct

What molecule is synthesized as electrons pass between the two photosystems? Select one: a. FADH b. ATP c. NADH d. NADP

b. ATP Correct

The products of the light reactions of photosynthesis are Select one: a. NADPH, H2O, and ADP. b. O2, NADPH, and ATP. c. H2O, CO2, and ATP. d. O2, ATP, and CO2.

b. O2, NADPH, and ATP. Correct

Compare the light reactions and the Calvin cycle in photosynthesis in the following question(s). Glucose is broken down. Select one: a. occurs during the Calvin cycle b. does not occur during either phase c. occurs during the light reactions d. occurs during both phases

b. does not occur during either phase Correct

Compare the light reactions and the Calvin cycle in photosynthesis in the following question(s). Oxygen is used. Select one: a. occurs during the Calvin cycle b. does not occur during either phase c. occurs during the light reactions d. occurs during both phases

b. does not occur during either phase Correct

Compare the light reactions and the Calvin cycle in photosynthesis in the following question(s). Carbon dioxide is used. Select one: a. does not occur during either phase b. occurs during the Calvin cycle c. occurs during both phases d. occurs during the light reactions

b. occurs during the Calvin cycle

Compare the light reactions and the Calvin cycle in photosynthesis in the following question(s). ATP is produced. Select one: a. occurs during the Calvin cycle b. occurs during the light reactions c. does not occur during either phase d. occurs during both phases Check

b. occurs during the light reactions Correct

You have two test tubes both filled with water and an elodea plant. You want to test the effect of wavelength on photosynthesis, so you wrap one test tube using a red colored seran wrap and place it under a light. What would you do to the other tube to have a proper control? Select one: a. Do not wrap the other tube and place it under the light. b. Wrap the other tube in aluminum foil and place it in the light. c. Wrap the other tube in clear seran wrap and place it in the light. d. Wrap the other tube in red colored seran wrap and place it out of the light.

c. Wrap the other tube in clear seran wrap and place it in the light. Correct

Which of the following environmental changes will most likely increase the photosynthetic rate of a plant? Select one: a. a decrease in temperature to 0ºC b. an increase in oxygen concentration c. an increase in carbon dioxide concentration Correct d. an increase in the amount of green light

c. an increase in carbon dioxide concentration Correct

Light-absorbing pigments that function in photosynthesis Select one: a. form crystals with a minimum of surface area. b. are mixed with enzymes in the stoma. c. are embedded in membranes. d. are composed of DNA or RNA.

c. are embedded in membranes. Correct

The most important result of photosynthesis is the Select one: a. breakdown of water by light. b. release of water into the air. c. conversion of light energy to chemical energy. d. removal of carbon dioxide from the air.

c. conversion of light energy to chemical energy. Correct

During photosynthesis, the oxygen atoms in water molecules Select one: a. help form both carbohydrates and water. b. help form carbohydrates. c. end up as oxygen gas. d. act as hydrogen-acceptor molecules. Check

c. end up as oxygen gas. Correct

The light reactions of photosynthesis Select one: a. convert visible light to chlorophyll during chemical reactions of thylakoids. b. bring in carbon dioxide and using ATP and NADPH make sugar.. c. include splitting a water molecule into protons, electrons, and oxygen. d. convert green visible light to chemical energy in the Calvin cycle. Check

c. include splitting a water molecule into protons, electrons, and oxygen. Correct

Compare the light reactions and the Calvin cycle in photosynthesis in the following question(s). Reactions are catalyzed by enzymes. Select one: a. does not occur during either phase b. occurs during the light reactions c. occurs during both phases d. occurs during the Calvin cycle

c. occurs during both phases

What would happen if you increased sunlight intensity? Select one: a. Increase ATP production. b. Increase NADPH production. c. Increase H2O consumption. d. All of the above.

d. All of the above. Correct

In plants, the wavelengths of light absorbed by chlorophyll are similar to those wavelengths most effective in promoting oxygen release by plants. Which is the best interpretation of this fact? Select one: a. Chlorophyll takes part in H2O release. b. Chlorophyll splits NADPH. c. Chlorophyll splits CO2 into O2 and free carbon. d. Chlorophyll takes part in the light reactions.

d. Chlorophyll takes part in the light reactions. Correct

Compare the light reactions and the Calvin cycle in photosynthesis in the following question(s). Simple sugar is produced. Select one: a. does not occur during either phase b. occurs during the light reactions c. occurs during both phases d. occurs during the Calvin cycle

d. occurs during the Calvin cycle Correct

Compare the light reactions and the Calvin cycle in photosynthesis in the following question(s). Oxygen is produced. Select one: a. does not occur during either phase b. occurs during both phases c. occurs during the Calvin cycle d. occurs during the light reactions

d. occurs during the light reactions Correct

The Calvin reactions of photosynthesis cannot proceed Select one: a. in the presence of light. b. without O2 being present. c. if CO2 concentrations are higher than O2 levels. d. without the products of the light reactions.

d. without the products of the light reactions. Correct