Question 14 What is the primary role of the sun in cellular energy processes? It provides the initial energy that plants capture during photosynthesis. It supplies the energy used by ATP to bond carbon atoms together. It directly converts water and carbon dioxide into glucose. It acts as the energy source for all cellular respiration processes. 1 pts
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Which answer best describes the role of light in photosynthesis? A.) Light is the primary source of energy that drives the carbon fixation (Calvin cycle) steps of photosynthesis. B.) Light is one of the products of photosynthetic reactions. C.) Light provides the primary source of energy that drives the first stage of photosynthesis (photophosphorylation). D.) Light is one of the reactants in the photosynthesis reactions.
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0.35. The light reactions of photosynthesis supply the Calvin cycle with: A) light energy. B) CO2 and ATP. C) ATP and NADPH. D) sugar and 02. E) H2O and NADPH. Q.36. Cells use a variety of metabolic pathways to construct ATP, but each concludes with the same step. Which of the following describes the final step by which ADP becomes ATP? a. photosynthesis c. carbon fixation b. phosphorylation d. electron transfer Q.37. Photosynthesis and cellular respiration are both complementary and relatively balanced, but early in the history of life on Earth photosynthesis appears to have dominated, as evidenced by the: a. accumulation of atmospheric oxygen. b. declines in historic sea level as photosynthetic organisms consumed water. c. gradual warming of Earth's climate as CO2 slowly accumulated. d. all of the above Q.38. During the process of photosynthesis, plants capture the kinetic energy of moving photons and transform it into potential energy in the form of: a. pyruvate. c. chemical bonds. b. stroma. d. thylakoid disks. Q.39. Which of the following applies to chloroplasts? a. They have an intermembrane space and a matrix. b. They have three membrane-enclosed compartments. c. Unlike mitochondria, they lack a stroma. d. They carry out both photosynthesis and respiration. Q.40. The outcome of the Calvin cycle is the: a. captures of energy from sunlight. b. synthesis of sugars like glucose, fructose, and sucrose. c. production of pyruvate. d. breakdown of complex molecules and the subsequent release of energy.
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