NCERT Solutions Class 11 Biology Chapter 14

NCERT Solutions for Class 11 Biology Chapter 14

We all know that energy is required to carry out our daily activities. Do plants, on the other hand, require energy? Is it true that plants breathe, and if so, what is the purpose of breathing? All of these may appear to be unrelated at first, but they are all related to the ‘Respiration’ process that our NCERT Class 11 Biology Chapter 14 deals with. The chapter also has to practice questions at the end to help students revise the learned concepts.

If students are looking for accurate answers to these practice questions, they are at the right place. Extramarks offers NCERT Solutions for Class 11 Biology Chapter 14 Respiration in Plants that are carefully curated by the subject-matter experts to provide answers to all the questions given in Chapter 14 of the NCERT Biology textbook. These are written as per the latest CBSE curriculum and guidelines to guide the students in their studies. 

NCERT Solutions for Class 11 Biology Chapter 14 – Respiration in Plants

NCERT Solutions Class 11 Biology Chapter 14 by Extramarks have answers to all the NCERT textbook questions. The solutions are written in a straightforward and structured manner so that students do not have any confusion in understanding the concept or explanation given for that question

Access NCERT Solutions for Class 11 Biology Chapter 14 – Respiration in Plants

NCERT Solutions for Class 11 Biology Chapter 14 – Respiration in Plants

Respiration in Plants Class 11 NCERT Solutions 

Chapter 14 of Class 11 Biology explains cellular respiration in plants and how it results in the release of energy through the disintegration of food within the cells. The chapter will also help students in understanding the process of respiration carried out in living beings. Here’s a detailed breakdown of the topics covered in Class 11 Biology Chapter 14:

Section Number Section Title
14.1 Do Plants Breathe?
14.2 Glycolysis
14.3 Fermentation
14.4 Aerobic Respiration
14.4.1 Tricarboxylic Acid Cycle
14.4.2 Electron Transport System (ETS) and Oxidative Phosphorylation
14.5 The Respiratory Balance Sheet
14.6 Amphibolic Pathway
14.7 Respiratory Quotient

 

14.1 Do Plants Breathe?

Plants require oxygen to respire, but the process emits carbon dioxide as a by-product. Plants, unlike humans and animals, lack specialised structures for gas exchange, but they do have stomata (found in leaves) and lenticels (found in stems) that are actively involved in the process. Thus, this section deals with plant respiration, types of respiration, and the respiratory quotient.

14.2 Glycolysis

Glycolysis is the partial oxidation of glucose or a similar hexose sugar into two molecules of pyruvic acid via an enzyme-mediated reaction that releases ATP, NADH and water. The process occurs in a cell’s cytoplasm and does not require oxygen. It can be found in both aerobic and anaerobic bacteria. 

14.3 Fermentation

In this process, incomplete oxidation of glucose is achieved, under anaerobic conditions. A series of reactions take place in the process that result in the conversion of carbon dioxide to ethanol. This section discusses yeast fermentation and how pyruvic acid is converted to ethanol and CO2.

14.4 Aerobic Respiration

This section explains aerobic respiration, which involves the oxidation of glucose to produce energy. The complete oxidation of organic substances is also discussed in the section.

14.4.1 Tricarboxylic Acid Cycle

This section deals with the tricarboxylic acid cycle, also known as the Krebs cycle, and terminal oxidation in detail. The TCA cycle is a type of tricarboxylic cycle. The matrix of mitochondria is where the second stage of cellular respiration takes place. 

14.4.2 Electron Transport System (ETS) and Oxidative Phosphorylation

The section introduces students to the electron transport system, which is a metabolic pathway in which an electron moves from one carrier to another inside the inner mitochondrial membrane, and oxidative phosphorylation. It uses the energy of oxidation-reduction to create the proton gradient needed for phosphorylation.

14.5 The Respiratory Balance Sheet

Calculating the gain of ATP for each glucose molecule oxidised is possible, but in practice, this is only a theoretical question. There are a few factors that it depends on. This section deals with how to calculate the amount of ATP released during glucose oxidation. 

14.6 Amphibolic Pathway 

Students will learn about the amphibolic pathway, which includes anabolism (synthesis) and catabolism (breaking down) within a living being.

14.7 Respiratory Quotient

This section deals with the respiratory quotient, which is the ratio of carbon dioxide produced to oxygen consumed in respiration over time. It’s also called the respiratory ratio. This ratio is determined by the respiratory substrate used during respiration.

NCERT Solutions for Class 11 Biology Chapter 14 Respiration in Plants

By referring to NCERT Solutions for Class 11 Biology Chapter 14, students will be able to answer tricky questions in exams in a better manner. Since they are curated by experts, Extramarks Solutions are accurate and reliable. 

Division of Marks for Respiration in Plants Class 11 NCERT

This chapter is a part of Unit 4 that has a weightage of 18 marks in exams. So a simple 1-mark question or a complex 5-mark question can be expected from this chapter. 

Advantages of NCERT Solutions for Class 11 Biology Chapter Respiration in Plants

The advantages of referring to the NCERT Solutions of Class 11 Biology Chapter 14 are as follows:  

  • They have been prepared as per the latest syllabus prescribed by CBSE. 
  • The use of easy and simple language in the study materials and detailed explanations will make the topics easy to understand.
  • These NCERT Solutions have answers written thoroughly so that students do not need to refer to help books.

FAQs (Frequently Asked Questions)

Calculating the net addition of ATP for each oxidized glucose particle is possible; however, this is merely a hypothetical exercise. These assumptions can be based on specific suspicions that: 

  • There is a sequential, methodical pathway in operation, with one substrate shaping the next, and with glycolysis, TCA cycle, and ETS pathway moving in a steady progression into the mitochondria and undergoing oxidative phosphorylation.
  • At any of the intermediate stages, only glucose is breathed; no other optional substrates enter the pathway.

However, in an actual living framework, these kinds of assumptions are rarely true; all pathways are active at the same time and do not always occur in the same order; substrates enter and exit pathways as needed; ATP is used as needed; enzymatic rates are constrained by various methods. As a result, during an oxygen-consuming breath of one atom of glucose, there can be a net increase of 36 ATP particles.

The concepts explained in Chapter 14 of Class 11 Biology are – “Do Plants Breathe?”, Glycolysis, Fermentation, Aerobic Respiration, The Respiratory Balance Sheet, Amphibolic Pathway and Respiratory Quotient. 

 The questions listed at the end of each chapter in NCERT textbooks are crucial not only for exams but also for a better understanding of the concepts. These questions have been designed to assess students’ comprehension and knowledge of the topics covered in the chapter. So after reading the chapter and understanding it, you must practise all the NCERT questions at the end of each chapter.