Exam 8: Photosynthesis

Please use the following information to answer the question(s) below. Theodor W. Engelmann illuminated a filament of algae with light that passed through a prism, thus exposing different segments of algae to different wavelengths of light. He added aerobic bacteria and then noted in which areas the bacteria congregated. He found that the largest groups were found in the areas illuminated by the red and blue light. -What did Engelmann conclude about the congregation of bacteria in the red and blue areas?

A flask containing photosynthetic green algae and a control flask containing water with no algae are both placed under a bank of lights, which are set to cycle between 12 hours of light and 12 hours of dark. The dissolved oxygen concentrations in both flasks are monitored. Predict what the relative dissolved oxygen concentrations will be in the flask with algae compared to the control flask.

What is the primary function of cyclic electron flow?

Which of the following statements is a correct distinction between autotrophs and heterotrophs?

Please use the following information to answer the question(s) below. A spaceship is designed to support animal life for a multiyear voyage to the outer planets of the solar system. Plants will be grown to provide oxygen and to recycle carbon dioxide. Because the spaceship will be too far from the sun for photosynthesis, an artificial light source will be needed. -What wavelengths of light should be used to maximize plant growth with a minimum of energy expenditure?

Which of the following are products of the light reactions of photosynthesis that are utilized in the Calvin cycle?

In the process of carbon fixation, three molecules of RuBP combine with three molecules of CO₂ to produce three six-carbon molecules, which are then split to produce 12 molecules of 3-phosphoglycerate. After phosphorylation and reduction produce 12 glyceraldehyde 3-phosphate (G3P), what more needs to happen to complete the Calvin cycle?

Figure 8.2 -Use Figure 8.2 and the compounds labeled A, B, C, D, and E to answer the following question. If the carbon atom of each of the incoming CO₂ molecules is labeled with a radioactive isotope of carbon, which organic molecules of the Calvin cycle will be radioactively labeled after one cycle?

What does the chemiosmotic process in chloroplasts involve?

Carotenoids are often found in foods that are considered to have antioxidant properties in human nutrition. What related function do they have in plants?

In mitochondria, the electron transport chain pumps protons from the matrix into the intermembrane space, whereas in chloroplasts, the electron transport chain pumps protons from

A reduction in the amount of NADP+ available in plant cells in the light will ultimately result in

Which of the following does not occur during the Calvin cycle?

How is photosynthesis similar in C4 plants and CAM plants?

What is the relationship between wavelength of light and the quantity of energy per photon?

What are the products of linear electron flow?

In mechanism, photophosphorylation is most similar to

Which of the following is directly associated with photosystem I?

Reduced soluble electron carriers are produced in

Photorespiration lowers the efficiency of photosynthesis by