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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BIOCHEMISTRY
- 2c. 2d. We know that most pigments are found in the chloroplasts of eukaryotic cells. Specifically WHERE is chlorophyll located in the chloroplast? Some PROKARYOTES are photosynthetic. Predict where the pigments might be located in these cells. Activity #3. Determining optimal wavelength of light used during spinach leaf photosynthesis Note: You'll need to read through this lab exercise and your textbook to answer these questions. Answer choices for questions #1-4 (Each answer can be used more than ADP ATP CO₂ Glucose H₂O Light NADP+ NADPH 0₂ 3. Which of the above are directly required by the light reactions? Hint: See the photosynthesis chapter in your textbook. 4. Which of the above are directly produced by the light reactions? 5. Which of the above are directly required by the Calvin cycle? 6. Which of the above are directly produced by the Calvin cycle? 11 7. (a) In our experiment, what will cause the leaf discs to float? (b) The greater the number of floating discs, the (greater…arrow_forwardRadioactive isotopes are routinely used to investigate processes in living things. In 1941, biologists exposed photosynthesizing cells to water containing a heavy oxygen isotope, designated 18-O. The labelled isotope appears in the oxygen gas released in photosynthesis, demonstrating that the oxygen came from water. Explain where the 18-O would have ended up if the researchers had used 18-O-labelled carbon dioxide.arrow_forwardThe 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
- 3 / 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(g) The figure given below represents an experiment to demonstrate a particular aspect of photosynthesis. The alphabet 'A' represents a certain condition inside the flask. 2 КОН (i) What is the aim of the experiment ? (ii) Identify the special condition inside the flask. (iii) Name an alternative chemical that can be used instead of KOH. (iv) In what manner do the leaves 1 and 2 differ at the end of the starch test ?arrow_forwardRefute or support the statement: “Photosynthesis and oxidative phosphorylation are essentially the reverse of each other.”arrow_forward
- “Photosynthesis is the single most important process for life on Earth.” Discuss this statement in some detail.arrow_forwardPart 3. During a class discussion, two of your classmates are discussing the processes of photosynthesis and cellular respiration. They make the following claims: Student A: Photosynthesis and Cellular Respiration are two separate processes; one can happen without the other. Student B: Photosynthesis and Cellular Respiration depend on each other; one cannot happen unless the other happens. Directions: Which statement do you agree with? Explain your answer. Write your answer in CER format in the box below. Follow the Student Criteria For Success Below to ensure you get proficient. To get a 4/4 create your models below: *Double click box below* Sign oarrow_forwardExcited molecules can return to the ground state by severalmeans. Describe each briefly. Which of these processes areimportant in photosynthesis? Describe how they function ina living organism.arrow_forward
- The reactants of photosynthesis are... carbon dioxide + water + light (energy) O oxygen + carbon dioxide O oxygen +glucose O light (energy) + glucose + waterarrow_forwardThe process of photosynthesis can be modeled in various ways. For example, a chemical equation is one way to represent photosynthesis. 6CO, + 6H,0 ++ +→ 60, + C,H,,O,arrow_forwardWhat is the answer?and Why?arrow_forward
- Biology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage Learning