Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN: 9781337408332
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Textbook Question
Chapter 7, Problem 1SQ
Is the following statement true or false? Unlike animals, which make many ATP by aerobic respiration, plants make all of their ATP by photosynthesis.
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Is the following statement true or false? Unlike animals,which make many ATP by aerobic respiration, plantsmake all of their ATP by photosynthesis
There is a constant flow of energy between the processes of photosynthesis and cellular respiration.
Photosynthesis produces a small amount of ATP energy which is used in cellular respiration to produce
more ATP molecules for use in cellular functions.
Place the following statements in order (some have been done for you) to summarize how the two
processes work together to produce usable energy for all living organisms.
1. Light energy is absorbed by the thylakoid membranes in chloroplasts.
2.
3.
4. PGAL is used to make glucose molecules (energy storage).
5.
6.
7.
8.
9. NADH from the Krebs cycle and O2 from the light reactions of photosynthesis are used in the electron
transport chain to create a proton gradient across the inner membrane of the mitochondria.
10.
11.
Energy from ATP and NADPH is used to fix CO2 and form PGAL (Calvin-Benson cycle)
Pyruvate is broken down into CO2 and acetyl CoA in the matrix
Krebs cycle makes NADH molecules
The absorbed energy is used to make ATP and…
Which of the following statements about the challenges of C3 photosynthesis under hot conditions
is TRUE?
O When they close stomatal cells, they save water but lose too much O2.
O Rubisco has a higher affinity for CO2, making the rate of photosynthesis too rapid.
When stomatal cells close, photorespiration increases and CO2 is lost.
C3 plants have to spend energy to store carbon in a separate specialized cell.
Chapter 7 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 7 - Prob. 1DAACh. 7 - Prob. 2DAACh. 7 - Prob. 3DAACh. 7 - Is the following statement true or false? Unlike...Ch. 7 - Glycolysis starts and ends in the ___. a. nucleus...Ch. 7 - Which of the following pathways requires molecular...Ch. 7 - Which molecule does not form during glycolysis? a....Ch. 7 - In eukaryotes, the final reactions of aerobic...Ch. 7 - Prob. 6SQCh. 7 - Prob. 7SQ
Ch. 7 - Most of the energy that aerobic respiration...Ch. 7 - Put the following pathways in the order they occur...Ch. 7 - Which of the following is not produced by an...Ch. 7 - Prob. 11SQCh. 7 - Prob. 12SQCh. 7 - Which of the following molecules can be oxidized...Ch. 7 - Prob. 14SQCh. 7 - Match the term with the best description. _____...Ch. 7 - Prob. 1CTCh. 7 - Prob. 2CT
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- Fill in the blanks with the sentences below: Energy from ATP and NADPH is used to fix CO2 and form PGAL (Calvin‑Benson cycle) Pyruvate is broken down into CO2 and acetyl CoA in the matrix Krebs cycle makes NADH molecules The absorbed energy is used to make ATP and NADPH (light reactions of photosynthesis) Glucose is broken down to form pyruvate (glycolysis) The proton gradient is used to make ATP molecules (chemiosmosis) in the mitochondria Acetyl CoA enters the Krebs Cycle ATP molecules are used to power cellular functions in all organisms 1. Light energy is absorbed by the thylakoid membranes in chloroplasts. 2. blank 3. blank 4. PGAL is used to make glucose molecules (energy storage). 5. blank 6. blank 7. blank 8. blank 9. NADH from the Krebs cycle and O2 from the light reactions of photosynthesis are used in the electron transport chain to create a proton gradient across the inner membrane of the mitochondria. 10. blank 11. blankarrow_forwardWhich of the following statements about photosynthesis is NOT true? Light independent reactions are very similar to the electron transport chain of cellular respiration Light is absolutely essential for both aspects of photosynthesis In order replace electrons, water is split to form oxygen gas Light dependent reactions are very similar, but in reverse, to the Krebs cycle and glycolysisarrow_forwardIn photosynthesis, which of the following is NOT true about the light-dependent (“light”) reaction? In photosynthesis, which of the following is NOT true about the light-dependent (“light”) reaction? Glucose is synthesized from CO2 and water during the light-dependent reaction The light-dependent reaction converts light energy to chemical energy stored in ATP The light-dependent reaction (non-cyclic) captures electrons in NADPH Light-excited electrons in chlorophyll provide the energy for ATP production None of the other four answers (All are true of the light-dependent reaction)arrow_forward
- What process or processes produce the proton gradient that powers ATP synthase in chloroplasts? (Select ALL correct answers) Protons are produced when water is split Protons are produced when NADP+ is reduced A proton pump uses light energy to move protons into the thylakoid space A proton pump uses energy from the electron transport chain to move protons into the thylakoid spacearrow_forwardChloroplasts contain chlorophyll and carotenoids. Chlorophyll directly absorbs light for use in photosynthesis. Carotenoids absorb light and transfer the energy from light to chlorophyll. The efficiency of photosynthesis varies with the wavelengths of the light that illuminates the chloroplasts. In an experiment to study the relationship between the incoming light wavelengths and the chemical reactions of photosynthesis using a species of green algae, a researcher labeled the CO2 supply to the algae with 14C, and the H2O with 18O. Which of the following results is expected? More 14C is found in the algae when it is illuminated by green light than when it is illuminated by blue-violet and red light. More 18O is found in the algae when it is illuminated by green light than when it is illuminated by blue-violet and red light. More 14C is found in the algae when it is illuminated by blue-violet and red light than when it is illuminated by green light. More 18O is found in the algae when…arrow_forwardChoose the statement that correctly identifies the process and location that produces most ATP from ADP during cellular respiration. glycolysis in cell cytoplasm Calvin cycle in chloroplasts Krebs cycle in mitochondria electron transport in mitochondriaarrow_forward
- Why do the cells of photosynthetic organisms contain accessory pigments? Accessory pigments provide a backup source of energy if the main pigment type fails. Accessory pigments direct light toward the primary pigment. Accessory pigments optimize the amount of energy that can be harvested in specific environments. Accessory pigments provide structural support for the primary pigments. Accessory pigments allow photosynthesis to occur at any time of the day.arrow_forwardCells are open systems that exchange matter and energy with their surroundings. Which of the following best explains why plant cells require sunlight to make organic compounds, according to Gibbs’s theory of free energy? The photosynthetic reaction releases free energy to the surroundings. The photosynthetic reaction’s free energy is in equilibrium. The reactants of photosynthesis have less free energy than the products. The change in free energy (∆G) of the photosynthetic system is less than zero.arrow_forwardIdentify the correct compound to create a chemical equation that represents Photosynthesis. + Drag and drop the right reactants and products of the Light Dependent and Light Independent (aka Dark) Reactions. Chloroplast NADPH NADP+ ADP Water - H20 Calvin Cycle Glucose - C6H1206 ATP Light Reaction Thylakoids Stroma O2 Carbon Dioxide CO2 Identify the reactants and products that are used and given off by plants and animals.arrow_forward
- Carbon fixation in plants is catalyzed by what enzyme? What is the name given to an organism (plant, bacteria or algae) that can produce its own food from organic molecules specifically by using photosynthesis? Which molecule leaves the Calvin cycle to be converted into glucose? What is the overall purpose of cellular respiration in photosynthetic organisms? In which plant organ does photosynthesis most commonly occur? Question options: the root the stem the leaf the flowerarrow_forwardWhich of the following statements about the light reactions of photosynthesis is NOT true? Chlorophyll and other pigments absorb light energy, which excites electrons ATP is generated by photophosphorylation Electrons from water are given to the chlorophyll molecules of Photosystem! The splitting of water molecules provides a source of electronsarrow_forwardIdentify each statement below as True or False. * Another name for phase I of photosynthesis is electron transport. Phase I of photosynthesis stores energy in NADPH molecules. Photosynthesis takes place inside the mitochondria. Energy is stored in water molecules during phase I of photosynthesis. Phase I of photosynthesis is also known a the light- dependent reactions. Photosynthesis phase I stores energy that is used to power phase II. Phase I of photosynthesis stores energy in ATP molecules. Phase I of photosynthesis can only take place when light is available. Light is not required for phase I of photosynthesis. The process of photosynthesis takes in the chloroplasts of a cell. place True ο ο ο ο ο ο ο ο False O оarrow_forward
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