Biology: The Unity and Diversity of Life
15th Edition
ISBN: 9780357093795
Author: STARR
Publisher: CENGAGE LEARNING (CUSTOM)
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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
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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- Which 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_forwardFill 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_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_forward
- Read each statement carefully and determine if it is true or false for photosynthesis: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_forwardCarbon 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_forward
- Plant chloroplasts are able to generate which of the following inorganic product molecules during oxygenic photosynthesis? C6H12O6 CO CO2 O2 H2Sarrow_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_forwardWhen you walk your dog, you are using energy from the sunlight to power this activity. Explain. What happens to animals that are deprived of oxygen? What will happen to plants if there will be shortage of CO2?arrow_forward
- Which of the following defines photorespiration? The metabolic pathway by which most autotrophs use the energy of light to make sugars from carbon dioxide and water The light-independent reactions of photosynthesis Process by which electron flow through electron transfer chains sets up a hydrogen ion gradient that drives ATP formation An inefficient metabolic pathway of producing sugars that occurs when O2 attaches to rubiscoarrow_forwardWhich of the following are stages of electron transfer phosphorylation? Select all that apply. Oxygen collects electrons from the end of the electron transfer chain to combine with hydrogen ions to form water. The electron transfer chain fuels active transport of hydrogen ions from the matrix to the intermembrane space. Hydrogen ion flow through an ATP synthase produces ATP. The NADH and FADH produced in the prior steps of aerobic respiration deliver electrons and hydrogen ions to the electron transfer chain.arrow_forwardWhich of the following best describes the net transfer of energy that occurs during the process of cellular respiration? solar energy from the sun is converted into chemical energy that is stored in the bonds of glucose molecules chemical energy that is stored in the bonds of glucose molecules is converted to energy stored in ATP molecules energy stored in the bonds of ATP molecules is released by breaking off the bond with the last phosphate group during cellular respiration Thermal energy from making smores is converted into chemical energy in the bonds of glucose moleculesarrow_forward
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Photosynthesis & Respiration | Reactions | Chemistry | FuseSchool; Author: FuseSchool - Global Education;https://www.youtube.com/watch?v=3XIyweZg6Sw;License: Standard YouTube License, CC-BY