NEET Exam > NEET Videos > Light reactions, Photo Systems
Light reactions, Photo Systems Video Lecture - NEET
FAQs on Light reactions, Photo Systems Video Lecture - NEET
| 1. What are light reactions in plants? |  |
Ans. Light reactions in plants are the initial steps of photosynthesis, where light energy is converted into chemical energy. These reactions occur in the thylakoid membranes of the chloroplasts and involve the absorption of light by chlorophyll and other pigments.
| 2. What are the two photosystems involved in light reactions? | |
Ans. The two photosystems involved in light reactions are Photosystem I (PSI) and Photosystem II (PSII). PSII functions first and absorbs light energy to excite electrons, which are then passed through an electron transport chain. PSI then receives these electrons and further energizes them before they are used in the production of ATP and NADPH.
| 3. How do light reactions contribute to the production of ATP and NADPH? | |
Ans. Light reactions contribute to the production of ATP and NADPH through a process called photophosphorylation. During this process, light energy is used to generate a proton gradient across the thylakoid membrane. This gradient is then harnessed by ATP synthase to produce ATP. Similarly, NADP+ molecules are reduced to form NADPH by accepting high-energy electrons from the electron transport chain.
| 4. What is the role of water in light reactions? | |
Ans. Water plays a crucial role in light reactions as it serves as an electron donor. In PSII, water molecules are split through a process called photolysis, releasing electrons, protons, and oxygen. The released electrons replace those lost by chlorophyll molecules, while the protons contribute to the proton gradient used in ATP synthesis. The oxygen produced is released as a byproduct.
| 5. How does light intensity affect light reactions? | |
Ans. Light intensity directly affects the rate of light reactions. Higher light intensity means more photons are available for absorption by chlorophyll, leading to an increased rate of electron excitation and subsequent ATP and NADPH production. However, beyond a certain threshold, light intensity can damage the photosynthetic machinery, reducing the efficiency of light reactions.
Related Exams
About this Video
|
4.87/5 Rating |
|
Nov 15, 2024 Last updated |
Light reactions, Photo Systems for NEET2024 is part of NEET preparation. The notes and questions for Light reactions, Photo Systems
have been prepared according to the NEET exam syllabus. Information about Light reactions, Photo Systems covers all important topics
for NEET2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises
and tests below for Light reactions, Photo Systems.
Description
Video Lecture & Questions for Light reactions, Photo Systems Video Lecture - NEET - NEET full syllabus preparation | Free video for NEET exam.
Information about Light reactions, Photo Systems
Here you can find the Light reactions, Photo Systems defined & explained in the simplest way possible. Besides explaining types of Light reactions, Photo Systems
theory, EduRev gives you an ample number of questions to practice Light reactions, Photo Systems tests, examples and also practice NEET tests.
|
Explore Courses for NEET exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
Related Searches
Objective type Questions
,Light reactions
,Photo Systems Video Lecture - NEET
,practice quizzes
,Summary
,video lectures
,Exam
,MCQs
,study material
,Photo Systems Video Lecture - NEET
,Extra Questions
,shortcuts and tricks
,Viva Questions
,Photo Systems Video Lecture - NEET
,Previous Year Questions with Solutions
,Important questions
,Light reactions
,past year papers
,ppt
,Sample Paper
,mock tests for examination
,Light reactions
,Semester Notes
,Free
;
Study Light reactions, Photo Systems on the App
Students of NEET can study Light reactions, Photo Systems alongwith tests & analysis from the EduRev app,
which will help them while preparing for their exam. Apart from the Light reactions, Photo Systems,
students can also utilize the EduRev App for other study materials such as previous year question papers, syllabus, important questions, etc.
The EduRev App will make your learning easier as you can access it from anywhere you want.
The content of Light reactions, Photo Systems is prepared as per the latest NEET syllabus.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup