Photosynthesis In Higher Plants Class 11 Notes, Mind map & MCQ For NEET Revision

Premium Photosynthesis In Higher Plants Class 11 Notes, Mind map & MCQ For NEET Revision
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Welcome to our comprehensive guide on photosynthesis in higher plants. Whether you're a student preparing for the NEET exam or simply interested in deepening your understanding of this vital process, you've come to the right place.

In this article, we will provide you with detailed class 11 notes, a mind map, and multiple-choice questions (MCQs) to help you revise and master the topic. Photosynthesis is the process by which green plants and some other organisms convert light energy into chemical energy to fuel their growth. It is a complex and fascinating process that plays a crucial role in maintaining the balance of oxygen and carbon dioxide in our atmosphere. Understanding the intricacies of photosynthesis is essential for anyone studying biology, as it forms the foundation for a wide range of ecological concepts.

Our class 11 notes will break down the key concepts and mechanisms involved in photosynthesis, ensuring that you have a solid grasp of the topic. The mind map will provide a visual representation of the intricate relationships between different components, facilitating better understanding and retention. Finally, our MCQs will test your knowledge and help you identify areas that need further review. Join us as we delve into the world of photosynthesis in higher plants and unlock the secrets of this amazing biological process.

Photosynthesis in higher plants is a fascinating chapter in Class 11 Biology, and it holds a significant place in NEET preparations. On WitKnowLearn, students can access comprehensive Class 11 notes that delve into this intriguing process.

These notes are tailored to give learners an in-depth understanding of the topic, making them an excellent resource for NEET aspirants. To further strengthen their grasp on the subject, students can engage in our meticulously designed NEET mock tests and MCQs focused on photosynthesis in higher plants. These resources are not only informative but also a fun way to test knowledge and prepare for exams.

Understanding photosynthesis in higher plants goes beyond just reading texts; it's about visual learning as well. That's why WitKnowLearn offers mind maps for Class 11 students. These mind maps simplify complex concepts, making them easier to remember and understand. Additionally, our platform provides a variety of extra questions with answers, giving students the opportunity to explore the topic more deeply. These questions are a great tool for revision and ensure that learners are well-prepared for their NEET exams. Whether it's the Class 11 Biology Chapter 11 notes or interactive MCQs, WitKnowLearn is dedicated to helping students excel in their studies and achieve their academic goals.


Photosynthesis is a process used by plants to make food and oxygen. Plants take in sunlight, water, and carbon dioxide to create glucose, a type of sugar they use for energy, and release oxygen as a by-product. This happens in the leaves of the plants, using a special green substance called chlorophyll.

Site for Photosynthesis

The main site for photosynthesis in plants is in the leaves, specifically in the cells of a part called the chloroplast. The chloroplast contains chlorophyll, which captures sunlight, starting the photosynthesis process.

Importance of Photosynthesis

Photosynthesis is essential because it produces food and oxygen, which are necessary for life on Earth. It helps maintain the balance of oxygen and carbon dioxide in the atmosphere and is the foundation of food chains.

Pigments Involved in Photosynthesis

Chlorophyll is the primary pigment involved in photosynthesis. There are two main types, chlorophyll a and chlorophyll b. They absorb light mostly in the blue and red wavelengths, and this light energy is then used to create glucose.

Light Harvesting Complexes (LHC)

Light Harvesting Complexes are groups of proteins and pigments, like chlorophyll, found in chloroplasts. They capture sunlight and transfer the energy to the reaction center, starting the photosynthesis process.


Photophosphorylation is the process of converting light energy into chemical energy during photosynthesis. It helps in making a molecule called ATP, which provides energy for the plant's cells.

Non-Cyclic Photophosphorylation

Non-cyclic photophosphorylation is a type of photophosphorylation where electrons do not return to the original molecule but are instead used to create ATP and another molecule called NADPH. This process is crucial in the overall photosynthesis mechanism.

Cyclic Photophosphorylation

Cyclic photophosphorylation is when electrons, after being excited by light, cycle back to the original pigment molecule instead of moving on to make NADPH. This process only produces ATP and is a backup mechanism in plants.


Photorespiration is a process that occurs when plants take in oxygen instead of carbon dioxide, leading to a less efficient form of photosynthesis. It usually happens in high oxygen or low carbon dioxide conditions.

Difference between C3 and C4 Plants

C3 and C4 plants differ in how they capture and process carbon dioxide. C3 plants directly fix carbon dioxide in their standard photosynthesis process, while C4 plants first convert carbon dioxide into a compound in specialized cells before entering the photosynthesis cycle. This makes C4 plants more efficient in hot, dry climates.

Factors Affecting Photosynthesis

Several factors affect photosynthesis, including light intensity, carbon dioxide concentration, temperature, and water availability. Each of these factors can either enhance or limit the rate of photosynthesis.

Blackman’s Law of Limiting Factors

Blackman’s Law states that the rate of photosynthesis is controlled by the slowest, or limiting, factor. For example, if there is enough light and carbon dioxide but the temperature is low, the temperature becomes the limiting factor in photosynthesis.


Photosynthesis is a critical process for life on Earth. It not only provides food and oxygen but also plays a significant role in the carbon cycle and energy flow in ecosystems. Understanding the various aspects of photosynthesis helps in appreciating the complexity and efficiency of this vital biological process.

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