Concept explainers
The light reactions take place in the structures of the chloroplast called the _____, while the Calvin cycle takes place in the _____.
To determine:
The structure of the chloroplast where light reactions take place and also the site where the Calvin cycle takes place.
Introduction:
The chloroplast is a plastid organelle present in green leaves and algae. Chloroplast is the site of photosynthesis. Photosynthesis is a process in which sunlight is used to prepare the food nutrients. The prepared nutrients are stored in the form of starch. The chloroplast contains the chlorophyll, thylakoid, 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 the organelle where photosynthesis takes place. The chloroplast is the double membrane bound organelle that contains the chlorophyll pigments, stroma, grana, and thylakoid. The thylakoid is present enclosed in the inner membrane of the chloroplast. It absorbs the light energy and provides green color to the chloroplast. The thylakoid membrane also contains the two photosystem unit or complex (PSI and PSII) where light reaction occurs.
The stroma is the fluid or aqueous layer that is present in the inner membrane of the chloroplast. The stroma consists of the stack of grana molecules. Various metabolic enzymes and proteins are also present in the stroma and they involve in the Calvin cycle. Thus, the dark reaction or Calvin cycle takes place inside the stroma of the chloroplast where ATP and NADH are synthesized.
The thylakoid membrane of the chloroplast is involved in the light reaction, while the stroma of the chloroplast involves in the Calvin cycle.
Want to see more full solutions like this?
Chapter 7 Solutions
Campbell Essential Biology (7th Edition)
Additional Science Textbook Solutions
Laboratory Manual For Human Anatomy & Physiology
Microbiology Fundamentals: A Clinical Approach
Human Physiology: An Integrated Approach (8th Edition)
HUMAN ANATOMY
Campbell Biology in Focus (2nd Edition)
- Selection of Traits What adaptations do scavengers have for locating and feeding on prey? What adaptations do predators have for capturing and consuming prey?arrow_forwardCompetition Between Species What natural processes limit populations from growing too large? What are some resources organisms can compete over in their natural habitat?arrow_forwardSpecies Interactions Explain how predators, prey and scavengers interact. Explain whether predators and scavengers are necessary or beneficial for an ecosystem.arrow_forward
- magine that you are conducting research on fruit type and seed dispersal. You submitted a paper to a peer-reviewed journal that addresses the factors that impact fruit type and seed dispersal mechanisms in plants of Central America. The editor of the journal communicates that your paper may be published if you make ‘minor revisions’ to the document. Describe two characteristics that you would expect in seeds that are dispersed by the wind. Contrast this with what you would expect for seeds that are gathered, buried or eaten by animals, and explain why they are different. (Editor’s note: Providing this information in your discussion will help readers to consider the significance of the research).arrow_forwardWhat is the difference between Uniporters, Symporters and Antiporters? Which of these are examples of active transport?arrow_forwardWhat are coupled transporters?arrow_forward
- How do histamine and prostaglandins help in the mobilization of leukocytes to an injury site? What are chemotactic factors? How do they affect inflammation process?arrow_forwardCompare and contrast neutrophils and macrophages. Describe two ways they are different and two ways they are similar.arrow_forwardDescribe the effects of three cytokines (not involved in the initial inflammation response). What cells release them?arrow_forward
- Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax CollegeBiology Today and Tomorrow without Physiology (Mi...BiologyISBN:9781305117396Author:Cecie Starr, Christine Evers, Lisa StarrPublisher:Cengage Learning