Unit 5: Plant Respiration, Growth, Cell & Tissues 

February 16, 2026

Semester 1
BP106RBT

Introduction to Plant Respiration, Growth, Cell & Tissues

Unit 5 is a mix of cell biology and plant physiology. It covers ‘Cell – The Unit of Life’, explaining organelles and cell division. It also discusses ‘Plant Respiration’ (how plants use energy) and ‘Plant Growth’ (hormones like Auxins). Finally, it touches on ‘Tissues’, the building blocks of organs.

Syllabus & Topics

  • 1Plant respiration: Respiration, glycolysis, fermentation (anaerobic)
  • 2Plant growth and development: Phases and rate of plant growth
  • 3Condition of growth: Light, Water, Oxygen, Nutrients
  • 4Introduction to plant growth regulators (Auxins, Gibberellins, Cytokinins, Ethylene, ABA)
  • 5Cell – The unit of life: Structure and functions of cell and cell organelles (Mitochondria, Chloroplast, Nucleus, etc.)
  • 6Cell division: Mitosis and Meiosis
  • 7Tissues: Definition, types of tissues, location and functions (Plant & Animal Tissues)

Learning Objectives

Explain the steps of Glycolysis.
List the functions of major Plant Growth Regulators.
Draw a labeled diagram of a Plant & Animal Cell.
Differentiate between Mitosis and Meiosis.
Classify animal tissues based on structure and function.

Frequently Asked Questions (FAQs)

Q1. What is Glycolysis?

Glycolysis is the metabolic pathway in which glucose is broken down into pyruvate in the cytoplasm, producing a small amount of ATP. It occurs in both aerobic and anaerobic respiration.

Q2. Define Plant Growth Regulators.

Plant Growth Regulators (PGRs) are chemical substances that influence plant growth and development. Examples include auxins (cell elongation), gibberellins (seed germination), and cytokinins (cell division).

Q3. Structure of Mitochondria?

Mitochondria are known as the powerhouses of the cell. They consist of an outer membrane, an inner folded membrane called cristae, and an inner space called the matrix, where ATP synthesis occurs.

Q4. Types of Tissues?

Tissues are groups of similar cells performing a specific function.

  • Plant tissues: Meristematic and Permanent

  • Animal tissues: Epithelial, Connective, Muscular, and Nervous

Q5. Difference between Mitosis and Meiosis?

  • Mitosis produces two identical daughter cells and is responsible for growth and repair.

  • Meiosis produces four genetically different haploid cells (gametes) and is essential for sexual reproduction.