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Where does the energy come from to drive photosynthesis?
| a. | A chloroplast |
| b. | ATP |
| c. | The sun |
| d. | Glucose |
Introduction:
The photosynthesis is required by the plant to harvest the light energy from the sunlight and convert the atmospheric carbon dioxide into a usable form of carbohydrates. The carbohydrate synthesized by the plant is glucose that is stored in the form of starch.
Answer to Problem 1MCQ
Correct answer:
The energy derived for initiating the process of photosynthesis is from Sun. Hence, the correct answer is option c.
Explanation of Solution
Reason for correct answer:
Option c. is given as,“The sun.”
The sun provides energy-rich particles called photons that excite the electrons present in the photosystem complex of the chloroplast. The excited electron initiates various mechanisms that give the end product as glucose. Hence, option c. is correct.
Reason for incorrect answer:
Option a. is given as, “A chloroplast.”
The chloroplast is the organelle that is present exclusively in plant cells and functions as the site for photosynthesis. Thus, it is the site for photosynthesis and not the source for energy for the process. Hence, option a. is incorrect.
Option b. is given as,“ATP.”
ATP stands for adenosine triphosphate. This is an energy-rich molecule that is used in the light-independent or dark reactions along with NADPH to form glucose. Therefore it does not initiate photosynthesis. Hence, option b. is incorrect.
Option d. is given as, “Glucose.”
Glucose is the end product of photosynthesis. The plant body uses it after transportation for various metabolic reactions; however, it does not provide energy for the process of photosynthesis. Hence, option d. is incorrect.
Hence, the options a., b., and d. are incorrect.
The energy from the sun provides photons that excite the electron that leads to activation of various mechanisms and complexes involved in the process of photosynthesis, causing the formation of glucose. Thus, the correct answer is option c.
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Chapter 5 Solutions
BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
- Which statement correctly describes carbon fixation? a. the conversion of CO2 to an organic compound b. the use of RUBISCO to form 3-PGA c. the production of carbohydrate molecules from G3P d. the formation of RuBP from G3P molecules e. the use of ATP and NADPH to reduce CO2arrow_forwardWhich molecule absorbs the energy of a photon in photosynthesis? a. ATP b. glucose c. chlorophyll d. waterarrow_forwardPlants produce oxygen when they photosynthesize. Where does the oxygen come from? a. splitting water molecules b. ATP synthesis c. the electron transport chain d. chlorophyllarrow_forward
- What is the energy of a photon first used to do in photosynthesis? a. split a water molecule b. energize an electron c. produce ATP d. synthesize glucosearrow_forwardThe net effect of photosynthesis, chemically, is reduction, leading to the formation of which products? a. Carbon dioxide and carbohydrates b. Carbon dioxide and protein c. Oxygen and carbohydrates d. Oxygen and ATParrow_forwardWhen oxygen gas is released as a result of photosynthesis, it is a direct byproduct of what process? a. splitting of water molecules b. the electron transfer system in the photosystems c. chemiosmosis d. reducing of NADP+arrow_forward
- How are the NADPH and G3P molecules made during photosynthesis similar? a. They are both end products of photosynthesis. b. They are both substrates for photosynthesis. c. They are both produced from carbon dioxide. d. They both store energy in chemical bonds.arrow_forwardWhat are the inputs in photosynthesis? O a. carbon dioxide, water and sunlight O b. carbon dioxide, water and heat O c. carbon dioxide and water O d. carbohydrates and oxygenarrow_forwardExplain correctlyarrow_forward
- In which process is ATP produced in both photosynthesis and cellular respiration by ATP synthase, respectively? a. Krebs Cycle and Light-dependent reaction b. Light-dependent reaction and oxidative phosphorylation c. Glycolysis and Light-independent reaction d. Light-independent reaction and oxidative phosphorylationarrow_forwardWhich of the below is required for photosynthesis? a. Carbon dioxide b. Oxygen c. Simple sugarsarrow_forwardWhich best describes a photosystem? A. Membrane-bound protein B. Synthesizer of ATP C. Major enzyme activity center D. Light reflectorarrow_forward
Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College