Class 11 Biology
CBSE · 19 Chapters · 166 Questions
The Living World
Characteristics of living organisms and basis of classification.
8 questions
Biological Classification
Five kingdom classification and characteristics of major groups.
10 questions
Plant Kingdom
Plant diversity, classification, and evolutionary relationships.
7 questions
Animal Kingdom
Animal diversity, classification, and evolutionary relationships.
11 questions
Morphology of Flowering Plants
Structure and modifications of roots, stems, leaves, and flowers.
6 questions
Anatomy of Flowering Plants
Tissue systems, internal structure of plant organs, and secondary growth.
7 questions
Structural Organisation in Animals
Animal tissues, organ systems, and morphology of frog.
2 questions
Cell: The Unit of Life
Cell theory, cell structure, and prokaryotic and eukaryotic cells.
12 questions
Biomolecules
This foundational chapter introduces Class 11 students to the chemical composition of living organisms, exploring proteins, carbohydrates, lipids, and nucleic acids. Students learn about the structure and function of these essential biomolecules, enzyme properties, and metabolic processes that sustain life. The chapter provides crucial knowledge for understanding cellular biochemistry and the molecular basis of life processes.
4 questions
Cell Cycle and Cell Division
This pivotal chapter guides Class 11 students through the intricate processes of cell replication and division. Students explore the cell cycle phases, mitosis, meiosis, and their significance in growth, repair, and reproduction. The chapter connects cellular division mechanisms to genetic continuity, diversity, and their implications in development, emphasizing the molecular control systems that regulate these fundamental biological processes.
15 questions
Photosynthesis in Higher Plants
This comprehensive chapter delves into the fundamental process by which plants convert light energy into chemical energy. Class 11 students explore the site of photosynthesis, pigment systems, photochemical and biosynthetic phases, and various biochemical pathways. The chapter emphasizes how this essential process sustains nearly all life on Earth by producing organic compounds and oxygen while examining factors that influence photosynthetic efficiency.
17 questions
Respiration in Plants
This essential chapter explores how plants release energy through the breakdown of organic compounds. Class 11 students investigate glycolysis, fermentation, aerobic respiration, and various metabolic pathways. The chapter details energy production, electron transport systems, and respiratory quotients, providing insights into how plants generate ATP to power their cellular activities and support growth, development, and reproduction.
8 questions
Plant Growth and Development
This dynamic chapter examines how plants grow and develop throughout their life cycle. Class 11 students explore growth phases, differentiation processes, plant hormones, and environmental factors influencing development. The chapter provides insights into photoperiodism, vernalization, and seed dormancy, demonstrating how internal and external cues coordinate to regulate plant morphogenesis and ensure adaptive survival strategies.
6 questions
Breathing and Exchange of Gases
This foundational chapter introduces Class 11 students to respiratory physiology in humans. Students examine respiratory organs, mechanisms of breathing, gas exchange in alveoli and tissues, and transport of gases in the bloodstream. The chapter explores how the respiratory system works with the circulatory system to deliver oxygen to cells and remove carbon dioxide, while also covering respiratory disorders and their implications for human health.
11 questions
Body Fluids and Circulation
This vital chapter examines the composition and functions of blood and lymph, the structure and working of the human heart, and the mechanisms of blood circulation. Class 11 students explore cardiac cycles, blood pressure regulation, and circulatory pathways. The chapter highlights how the circulatory system delivers nutrients and oxygen to tissues while removing waste products, maintaining homeostasis essential for overall physiological functioning.
11 questions
Excretory Products and their Elimination
This comprehensive chapter explores how the human body eliminates metabolic waste products. Class 11 students examine the structure and function of the excretory system, mechanisms of urine formation, and regulation of kidney function. The chapter details the processes of filtration, reabsorption, and secretion in nephrons, highlighting how the excretory system maintains fluid balance, electrolyte composition, and acid-base balance essential for homeostasis.
10 questions
Locomotion and Movement
This dynamic chapter examines the mechanisms enabling movement in humans. Class 11 students explore the skeletal and muscular systems, types of joints, and muscle contraction processes. The chapter details how bones, muscles, and joints work together to produce coordinated movements, while also covering disorders affecting the musculoskeletal system. Students gain insights into the biomechanical principles underlying human locomotion and physical activity.
9 questions
Neural Control and Coordination
This intricate chapter explores the human nervous system and its role in coordinating body functions. Class 11 students examine neuron structure, nerve impulse transmission, central and peripheral nervous systems, and reflex actions. The chapter details sensory reception and processing, providing insights into how the nervous system enables rapid responses to internal and external stimuli while facilitating complex functions from basic movements to higher cognitive processes.
6 questions
Chemical Coordination and Integration
This concluding chapter examines the endocrine system and its role in chemical coordination. Class 11 students explore endocrine glands, hormone actions, and feedback mechanisms regulating hormone secretion. The chapter details how the endocrine system works with the nervous system to maintain homeostasis, regulate metabolism, development, and reproduction. Students gain insights into hormonal disorders and their physiological impacts on human health and wellbeing.
6 questions