NCERT Exemplar Solutions for Class 11 Biology Chapter 11 Transport in Plants
The NCERT Exemplar Solutions for Class 11 Biology Chapter 11, Transport in Plants, help students develop a deep understanding of the movement of water, minerals, and nutrients within plants. This chapter explains how plants absorb substances from the soil and distribute them across different parts. Since plants lack a circulatory system like animals, they rely on unique physiological processes to ensure efficient transport. The NCERT Exemplar problems for this chapter are designed to test conceptual clarity and application-based understanding, making them valuable for board exams and competitive exams such as NEET. The chapter begins with diffusion, a passive process that allows the movement of molecules from a region of higher concentration to one of lower concentration. Exemplar questions often test the differences between simple diffusion and facilitated diffusion, which involves carrier proteins.
Another key concept is osmosis, the movement of water through a semipermeable membrane. Students learn about osmotic pressure, plasmolysis, and the significance of water potential in osmosis. The Exemplar questions focus on scenarios like the uptake of water by roots or the loss of water from cells when placed in hypertonic solutions. The chapter also introduces active transport, which requires energy in the form of ATP. Unlike diffusion, active transport enables the movement of molecules against their concentration gradient. Exemplar questions typically ask about the role of carrier proteins, energy requirement, and how this process supports nutrient absorption. One of the most important topics is the transport of water in plants, explained through processes like root pressure, capillary action, and the cohesion-tension theory. The NCERT Exemplar questions for this section often test students’ ability to explain how transpiration pull helps in the upward movement of water through the xylem.
Transpiration is another central theme. It is the loss of water vapor from stomata and cuticles. The chapter explains its significance in maintaining water movement, temperature regulation, and nutrient distribution. Exemplar questions may involve analyzing the factors affecting transpiration, such as light, humidity, wind, and temperature. The chapter further discusses transport of food materials, primarily sucrose, through the phloem. The pressure-flow hypothesis is explained as the mechanism of translocation. Exemplar questions often ask students to differentiate between xylem and phloem transport and apply the pressure-flow theory in real-life examples. In addition, mineral transport and the movement of ions across membranes are covered in detail. Exemplar questions check students’ understanding of symplast and apoplast pathways and the role of membrane proteins in ion exchange. To prepare effectively, students should carefully go through diagrams provided in the NCERT textbook, such as pathways of water movement and structure of phloem tissues. Solving NCERT Exemplar questions strengthens analytical skills, enabling students to apply theoretical knowledge to practical situations. In summary, NCERT Exemplar Solutions for Class 11 Biology Chapter 11 Transport in Plants help students grasp the complex mechanisms of movement within plants. By practicing these questions, learners gain confidence in answering higher-order problems and build a solid foundation for advanced biology topics in future classes and competitive exams.