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Disha Xtract Biology” is a popular book that provides a comprehensive overview of key concepts in biology for various competitive exams. Covering a wide range of topics, it serves as a concise and focused resource for students aiming to excel in biology-related assessments.

The book is structured to offer a concise yet thorough understanding of biology. It includes essential chapters spanning across areas such as cell biology, genetics, ecology, plant physiology, animal physiology, and more. Each chapter delves into the core concepts, offering explanations, diagrams, and examples to aid in comprehension.

The Disha Xtract Biology book is specifically designed for quick revision, making it a valuable tool for last-minute preparations. It emphasizes the most important points, formulas, and facts that are frequently asked in competitive exams. This approach helps students save time while ensuring they retain crucial information.

One of the standout features of the book is its practice questions. It includes a compilation of previous years’ questions from various competitive exams, enabling students to gauge the types of questions that might appear. By practicing these questions, students can become familiar with the exam pattern and enhance their problem-solving skills.

Furthermore, the book incorporates mnemonic techniques and memory aids to assist students in recalling complex concepts more easily. This feature proves especially useful for retaining intricate biological terms and processes.


The content of the book includes:

Cell Biology:

Cell Structure and Functions
Cell Division (Mitosis and Meiosis)
Biomolecules: Proteins, Nucleic Acids, Carbohydrates, Lipids
Enzymes and their Functions

Mendelian Genetics and Inheritance Patterns
Chromosomal Aberrations
DNA Replication, Transcription, and Translation
Genetic Engineering and Biotechnology

Ecosystems and their Components
Ecological Pyramids and Energy Flow
Biodiversity and Conservation
Environmental Issues and Pollution
Plant Physiology:

Photosynthesis and Respiration
Plant Growth Regulators
Transport in Plants (Xylem and Phloem)
Mineral Nutrition and Absorption
Human Physiology:

Digestive System and Nutrient Absorption
Respiratory System and Gas Exchange
Circulatory System and Blood Composition
Nervous System, Hormones, and Homeostasis

Reproductive Systems in Plants and Animals
Human Reproductive System
Reproductive Health and Birth Control

Theories of Evolution (Darwinism, Lamarckism, etc.)
Evidence of Evolution
Human Evolution and Fossil Records
Diversity of Living Organisms:

Classification and Taxonomy
Five Kingdom Classification
Viruses, Bacteria, Fungi, Plants, and Animals
Plant Kingdom:

Algae, Bryophytes, Pteridophytes, Gymnosperms, Angiosperms
Plant Morphology and Reproduction
Animal Kingdom:

Classification of Animals
Animal Tissues, Organ Systems, and Morphology
Animal Behavior and Adaptations

Genetic Engineering Techniques
Recombinant DNA Technology
Biotechnological Applications
Human Health and Diseases:

Common Diseases and their Causes
Immune System and Vaccination
Human Health and Hygiene
The book also includes practice questions at the end of each chapter, which are curated from previous years’ competitive exams. These questions help students assess their understanding and exam preparedness. Additionally, the book incorporates memory aids and mnemonic techniques to assist in retaining critical information.

Overall, the content of “Disha Xtract Biology” aims to provide a concise yet comprehensive review of biology topics essential for competitive exams, ensuring that students have a solid foundation in the subject.

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