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Oct 1, 2022

3 pages

Photosynthesis for Kids: Light-dependent and Light-independent Reactions

user profile picture

Ruth Knowunity

@knowunity.uk

Photosynthesis is a complex process involving light-dependent and light-independent reactions... Show more

Di
0
3.5 - Evergy transfers in and between organisms.
3.5.1- Photosynthesis.
The Light Dependent Reaction.
to Uses light energy and
water
to

Light-Independent Reactions and the Calvin Cycle

The light-independent reactions, also known as the Calvin cycle, occur in the stroma of chloroplasts. These reactions use the products of the light-dependent reactions ATPandNADPHATP and NADPH to fix carbon dioxide into organic compounds.

Definition: The Calvin cycle is a series of biochemical reactions that use ATP and NADPH to convert carbon dioxide into glucose.

The Calvin cycle consists of several steps:

  1. Carbon fixation: CO₂ combines with ribulose bisphosphate RuBPRuBP to form an unstable 6-carbon compound, catalyzed by the enzyme rubisco.
  2. Reduction: The unstable compound is split into two 3-carbon molecules called glycerate-3-phosphate GPGP.
  3. Regeneration: GP is reduced to triose phosphate TPTP using ATP and NADPH.

Highlight: The role of ATP and NADPH in photosynthesis is crucial in this stage, providing the energy and reducing power needed to convert CO₂ into sugar.

  1. Synthesis of glucose: Some TP molecules are used to synthesize glucose, while others are recycled to regenerate RuBP.

Example: Out of every six carbon atoms that enter the cycle, one glucose molecule C6H12O6C₆H₁₂O₆ is produced, while the rest are used to regenerate RuBP.

Di
0
3.5 - Evergy transfers in and between organisms.
3.5.1- Photosynthesis.
The Light Dependent Reaction.
to Uses light energy and
water
to

Limiting Factors and Agricultural Practices in Photosynthesis

Understanding the factors affecting the rate of photosynthesis is crucial for optimizing plant growth and agricultural productivity. The main limiting factors include:

  1. Temperature: Affects enzyme activity and overall metabolic rates.
  2. CO₂ concentration: Influences the rate of carbon fixation in the Calvin cycle.
  3. Light intensity: Determines the rate of light-dependent reactions.

Highlight: These are three of the 7 factors affecting the rate of photosynthesis, with others including water availability, mineral nutrients, leaf color, and leaf age.

Agricultural practices have been developed to overcome these limiting factors:

  1. Using LED lights: Provides optimal light intensity and spectrum for photosynthesis.
  2. Greenhouse cultivation: Allows control over temperature and CO₂ levels.
  3. CO₂ enrichment: Burning fuel to increase CO₂ concentration in greenhouses.

Example: In a practical investigating factors affecting the rate of photosynthesis, students might measure oxygen production under different light intensities or CO₂ concentrations.

Understanding these factors and practices is essential for maximizing crop yields and addressing global food security challenges.

Di
0
3.5 - Evergy transfers in and between organisms.
3.5.1- Photosynthesis.
The Light Dependent Reaction.
to Uses light energy and
water
to

Light-Dependent Reactions in Photosynthesis

The light-dependent reaction in photosynthesis is a crucial process that occurs in the thylakoid membrane of chloroplasts. This reaction harnesses light energy to produce ATP and NADPH, which are essential for the subsequent light-independent reactions.

Definition: Light-dependent reactions are the initial stage of photosynthesis where light energy is converted into chemical energy in the form of ATP and NADPH.

The process involves several key steps:

  1. Photoionization of chlorophyll: Light energy excites electrons in photosystem II PS2PS2, raising them to a higher energy level.
  2. Photolysis of water: The excited electrons from PS2 are replaced by splitting water molecules, releasing oxygen as a byproduct.

Equation: H₂O → O₂ + H⁺ + e⁻

  1. Electron Transport Chain ETCETC: Excited electrons move down the ETC, losing energy and pumping H⁺ ions into the thylakoid space.
  2. Chemiosmosis: The proton gradient created by the ETC drives ATP synthesis through ATP synthase.

Vocabulary: Chemiosmosis is the movement of ions across a selectively permeable membrane, down their electrochemical gradient.

  1. NADPH Production: Electrons that have passed through the ETC are energized again in photosystem I PS1PS1 and used to reduce NADP⁺ to NADPH.

Highlight: The light-dependent reaction steps produce two key products: ATP and NADPH, which are crucial for the Calvin cycle in the light-independent reactions.



Can't find what you're looking for? Explore other subjects.

Students love us — and so will you.

4.9/5

App Store

4.8/5

Google Play

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan S

iOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha Klich

Android user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

Anna

iOS user

I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️

Thomas R

iOS user

Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades

Brad T

Android user

Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍

David K

iOS user

The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend

Aubrey

iOS user

Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀

Marco B

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!

Paul T

iOS user

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan S

iOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha Klich

Android user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

Anna

iOS user

I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️

Thomas R

iOS user

Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades

Brad T

Android user

Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍

David K

iOS user

The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend

Aubrey

iOS user

Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀

Marco B

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!

Paul T

iOS user

 

Biology

162

Oct 1, 2022

3 pages

Photosynthesis for Kids: Light-dependent and Light-independent Reactions

user profile picture

Ruth Knowunity

@knowunity.uk

Photosynthesis is a complex process involving light-dependent and light-independent reactions. This summary covers the key steps, components, and factors affecting photosynthesis, with a focus on the light-dependent reactions and their products. It also touches on the Calvin cycle and... Show more

Di
0
3.5 - Evergy transfers in and between organisms.
3.5.1- Photosynthesis.
The Light Dependent Reaction.
to Uses light energy and
water
to

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Access to all documents

Improve your grades

Join milions of students

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Light-Independent Reactions and the Calvin Cycle

The light-independent reactions, also known as the Calvin cycle, occur in the stroma of chloroplasts. These reactions use the products of the light-dependent reactions ATPandNADPHATP and NADPH to fix carbon dioxide into organic compounds.

Definition: The Calvin cycle is a series of biochemical reactions that use ATP and NADPH to convert carbon dioxide into glucose.

The Calvin cycle consists of several steps:

  1. Carbon fixation: CO₂ combines with ribulose bisphosphate RuBPRuBP to form an unstable 6-carbon compound, catalyzed by the enzyme rubisco.
  2. Reduction: The unstable compound is split into two 3-carbon molecules called glycerate-3-phosphate GPGP.
  3. Regeneration: GP is reduced to triose phosphate TPTP using ATP and NADPH.

Highlight: The role of ATP and NADPH in photosynthesis is crucial in this stage, providing the energy and reducing power needed to convert CO₂ into sugar.

  1. Synthesis of glucose: Some TP molecules are used to synthesize glucose, while others are recycled to regenerate RuBP.

Example: Out of every six carbon atoms that enter the cycle, one glucose molecule C6H12O6C₆H₁₂O₆ is produced, while the rest are used to regenerate RuBP.

Di
0
3.5 - Evergy transfers in and between organisms.
3.5.1- Photosynthesis.
The Light Dependent Reaction.
to Uses light energy and
water
to

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

Limiting Factors and Agricultural Practices in Photosynthesis

Understanding the factors affecting the rate of photosynthesis is crucial for optimizing plant growth and agricultural productivity. The main limiting factors include:

  1. Temperature: Affects enzyme activity and overall metabolic rates.
  2. CO₂ concentration: Influences the rate of carbon fixation in the Calvin cycle.
  3. Light intensity: Determines the rate of light-dependent reactions.

Highlight: These are three of the 7 factors affecting the rate of photosynthesis, with others including water availability, mineral nutrients, leaf color, and leaf age.

Agricultural practices have been developed to overcome these limiting factors:

  1. Using LED lights: Provides optimal light intensity and spectrum for photosynthesis.
  2. Greenhouse cultivation: Allows control over temperature and CO₂ levels.
  3. CO₂ enrichment: Burning fuel to increase CO₂ concentration in greenhouses.

Example: In a practical investigating factors affecting the rate of photosynthesis, students might measure oxygen production under different light intensities or CO₂ concentrations.

Understanding these factors and practices is essential for maximizing crop yields and addressing global food security challenges.

Di
0
3.5 - Evergy transfers in and between organisms.
3.5.1- Photosynthesis.
The Light Dependent Reaction.
to Uses light energy and
water
to

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

Light-Dependent Reactions in Photosynthesis

The light-dependent reaction in photosynthesis is a crucial process that occurs in the thylakoid membrane of chloroplasts. This reaction harnesses light energy to produce ATP and NADPH, which are essential for the subsequent light-independent reactions.

Definition: Light-dependent reactions are the initial stage of photosynthesis where light energy is converted into chemical energy in the form of ATP and NADPH.

The process involves several key steps:

  1. Photoionization of chlorophyll: Light energy excites electrons in photosystem II PS2PS2, raising them to a higher energy level.
  2. Photolysis of water: The excited electrons from PS2 are replaced by splitting water molecules, releasing oxygen as a byproduct.

Equation: H₂O → O₂ + H⁺ + e⁻

  1. Electron Transport Chain ETCETC: Excited electrons move down the ETC, losing energy and pumping H⁺ ions into the thylakoid space.
  2. Chemiosmosis: The proton gradient created by the ETC drives ATP synthesis through ATP synthase.

Vocabulary: Chemiosmosis is the movement of ions across a selectively permeable membrane, down their electrochemical gradient.

  1. NADPH Production: Electrons that have passed through the ETC are energized again in photosystem I PS1PS1 and used to reduce NADP⁺ to NADPH.

Highlight: The light-dependent reaction steps produce two key products: ATP and NADPH, which are crucial for the Calvin cycle in the light-independent reactions.

Can't find what you're looking for? Explore other subjects.

Students love us — and so will you.

4.9/5

App Store

4.8/5

Google Play

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan S

iOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha Klich

Android user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

Anna

iOS user

I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️

Thomas R

iOS user

Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades

Brad T

Android user

Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍

David K

iOS user

The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend

Aubrey

iOS user

Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀

Marco B

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!

Paul T

iOS user

The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.

Stefan S

iOS user

This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.

Samantha Klich

Android user

Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.

Anna

iOS user

I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️

Thomas R

iOS user

Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades

Brad T

Android user

Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍

David K

iOS user

The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!

Sudenaz Ocak

Android user

In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.

Greenlight Bonnie

Android user

I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend

Aubrey

iOS user

Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀

Marco B

iOS user

THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮

Elisha

iOS user

This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!

Paul T

iOS user