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To determine: The structure of the chloroplast where light reactions take place and also the site where the Calvin cycle take place.
Introduction:
The chloroplast is plastid organelle present in green leaves and algae. This is the site for photosynthesis. Photosynthesis is a process in which sunlight is used to prepare the nutrients which is stored in the form of starch. The choloplast contains the chlorophyll, thlakoid, grana and stroma.
Answer to Problem 1SQ
Correct answer: The light reactions take place in the structures of the chloroplast called the thylakoid, while the calvin cycle takes place in the stroma
Explanation of Solution
The chloroplast is plastid organelles which involves in the photosynthesis. The chloroplast is double membrane bound organelle which contains the chlorophyll pigments, stroma, grana and thylakoid. The thylakoid is present in the inner membrane of chloroplast which absorbs the light energy and provides green color to chloroplast. The thylakoid membrane also contains the two photosystem unit or complex (PSI and PSII) which involves in the light reaction.
The stroma is the fluid or aqueous layer which is present in the inner membrane of the chloroplast. The stroma consist the stack of grana molecules and various
The thylakoid membrane of chloroplast involves in the light reaction while the stroma of the chloroplast involves in the Calvin cycle.
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Chapter 7 Solutions
Campbell Essential Biology with Physiology (6th Edition)
- Which of the following substances does not participate in the Calvin-Benson cycle? a. ATP c. NADPH e. PGAL b. O2 d. RuBP f. CO2arrow_forwardThe function of the _____________ complex in photosynthesis is similar to the Q cycle in mitochondria.arrow_forwardThe stored energy in ATP and NADPH is then used later in photosynthesis to build one molecule of_________from six molecules of CO2.arrow_forward
- ATP formed during photosynthesis is considered _________________ phosphorylation. Substrate level Oxidative Photo Reversarrow_forwardThe original electron donor during the process of photosynthesis is _____________. (i.e. where do the electrons originally come from?) H2O Pyruvate O2 NADP+arrow_forwardThe high energy molecules that provide the energy to run the reactions of the Calvin cycle are ______________ and ________________. During the first step in the Calvin cycle, a molecule of carbon dioxide gas binds to a 5-carbon molecule called Ribulose 1,5-biphosphate (RuBP). This step of the Calvin cycle is called: ___________________________. After three carbon dioxide molecules have been fixed to three RuBP and the Calvin cycle completes one turn, the organic molecule that is produced is _______________________. Once two of the molecules from the previous blank have been produced, they can combine to make a single six-carbon __________________________ molecule.arrow_forward
- true or false All living photosynthetic organisms are capable of photosynthesis but not respiration.arrow_forwardWhich two products of the light-dependent reactions are used up in the Calvin cycle? Rubisco adds a CO2 molecule to a sugar that contains _______ carbons. The reaction product immediately splits into two sugars that each contain _______ carbons. O2 can compete with CO2 for a place in the rubisco active site. As a consequenceO2 is incorporated into RuBP instead of CO2. Why might this be a disadvantage?arrow_forwardThe ______________, one of the chemical reactions that occurs in the process of ______________, is also called dark reactions and light-independent reactions. Question 3 options: Lehman Function, nucleosynthesis Bohr Cycle, photosynthesis Redox Reaction, chemosynthesis Bowen Reaction, chemosynthesis Calvin Cycle, photosynthesis None of the other answers are correct.arrow_forward
- For every three molecules of CO2 that are incorporated into carbohydrate during the Calvin cycle there is a net gain of one molecule of _____________.arrow_forwardThe light-independent or dark reactions of photosynthesis occur only at night. Do you agree with this statement?arrow_forwardThe energy provided by the light reaction is used to fix CO2 during the Calvin cycle. This energy is in the form ofarrow_forward
