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Concept explainers
(a)
Interpretation:
If life were to exist elsewhere in the universe, it would require some process like photosynthesis.
Concept introduction:
The plants use the sun’s light energy to convert water and carbon dioxide to form energy-rich glucose molecules by the process of photosynthesis. Photosynthesis occurs in the chloroplasts of plants. Animals being heterotrophic consume plants or other animals for energy requirements.
(b)
Interpretation:
If the Starship Enterprise were to land on a distant planet and find no measurable oxygen in the atmosphere, could the crew conclude that photosynthesis is taking place or not.
Concept introduction:
Water acts as the electron donorin photosynthesis to produce glucose and oxygen. The absence of water hampers the process.
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Chapter 19 Solutions
Biochemistry (Looseleaf)
- The law of conservation of matter states that no matter on earth can be created or destroyed. Using the following equation: 6H2O + 6CO2 + Sunlight—> C6H12O6 + 6O2, explain how the process of photosynthesis is an example of this.arrow_forward“Photosynthesis is the single most important process for life on Earth.” Discuss this statement in some detail.arrow_forward3 / 4 90% + 1 pH 4 8. The following is an experiment with isolated thylakoids. The thylakoids were first made acidic by soaking them in a solution at pH 4. After the thylakoid space reached pH 4, the thylakoids were transferred to a basic solution at pH 8. The thylakoids then made ATP in the dark. Draw an enlargement of part of the thylakoid membrane in the beaker with the solution at pH 8. Dra ATP synthase. Label the areas of high H+ concentration and low H+ concentration. Show the direction protons flow through the enzyme, and show the reaction where ATP is synthesized. Would ATP end up in the thylakoid or outside of it? Explain why thylakoids in the experiment were able to make ATP in the dark. 88 pH 7 SE pH 4 [ A 88 → tv pH 8 3 ATP Aarrow_forward
- Refute or support the statement: “Photosynthesis and oxidative phosphorylation are essentially the reverse of each other.”arrow_forward. Some people say that plant cells carry out photosynthesis and animal cells carry out respiration. Do you agree or disagree with this statement? Provide a valid explanation to support your answer.arrow_forwardCell respiration and photosynthesis are distinct metabolic processes that take place in the mitochondrion and chloroplast, respectively. While these two processes are separate, they share things in common. When one looks at the overall equations for cell respiration and photosynthesis, one sees how they are near opposites in terms of the starting and ending materials. In 300-400 words, describe this “near opposite” relationship between cell respiration and photosynthesis. What are the starting and ending materials in each process, and what kind of energy transformation is taking place?arrow_forward
- Photosynthesis is a complex process that has an important impact on your daily life and the ecosystem of the entire planet. Photosynthesis is the source for all of the carbon that builds the bodies of organisms and the energy that runs their bodies. Which of the following statements is correct? A. You are born with all the carbon atoms you need for your entire life. B. As you grow, you need to take in more carbon atoms.arrow_forwardYou are a marine biologist sampling an offshore ecosystem. One day, you find a red organism floating in one of your nets. It has structures that resemble the leaves and stems of a plant. You hypothesize that this organism might be photosynthetic. Describe how you could test this hypothesis using a pH indicator solution. a. In detail, describe the steps you would take and the reactants of photosynthesis required. b. What change in pH would indicate that the organism was undergoing photosynthesis, and how would the indicator respond?arrow_forwardThe pure “fire air” consumed by a burning candle in a sealed glass jar, or by a mouse during aerobic respiration (in experiments conducted by Joseph Priestley), contains which of the following elements? hydrogen and carbon (derived from the C6H12O6 produced by plants during photosynthesis) carbon and oxygen (derived from the CO2 consumed by plants during photosynthesis) carbon only (derived from the C6H12O6 produced by plants during photosynthesis) hydrogen only (derived from the H2O produced by plants during photosynthesis) oxygen only (derived from the O2 produced by plants during photosynthesis)arrow_forward
- Chemiosmosis occurs in both photosynthesis and cellular respiration, resulting in the production of ADP from ATP. (a). Is the above statement true or false? (b) Give ONE reason for your answer in (a).arrow_forwardFirst, you should map out all of the biochemical stages and processes in cellular respiration and photosynthesis. This means all of the stages are unpacked in-depth (light-dark Calvin Krebs glycolysis) into stages, their inputs (reactants), outputs (Products), and interdependent molecules (connected molecules). Add more detail to the mind map below about cellular respiration and photosynthesis. (Also added an extra image of what the level of detail should be.)arrow_forwardOxygenic photosynthesis in eukaryotes (in the chloroplasts of green algae and green plants) consumeswhich of the following substrate molecules (to generate glucose, water, and oxygen product molecules)?A. C12H22O11 + H2OB. C6H12O6 + 6O2 + 6H2OC. 6CO2 + 12H2OD. C6H12O6 + C6H12O6E. 6CO2 + 12H2Sarrow_forward
- Biology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage Learning
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