Long Answer Questions - THE CELL | GNM First Year | NursingNotesGNM
The Cell: Structure, Reproduction and Functions – Long Answer (10-Mark) Questions
This post contains exam-oriented Long Answer (10-mark) questions with answers on The Cell: Structure, Reproduction and Functions, specially prepared for GNM, BSc Nursing, ANM, Staff Nurse, NORCET, AIIMS and other nursing examinations. The answers are written in a clear, structured, and point-wise format, ideal for scoring full marks in theory exams.
Introduction
The cell is the basic structural and functional unit of life. Long answer questions (10 marks) from this chapter are frequently asked in nursing anatomy and physiology examinations. These questions test a student’s understanding of definition, structure, functions, and clinical importance. Writing answers with proper headings, diagrams (if allowed), and well-organized points is essential for high scores.
Long Answer Questions (10-Mark)
1. Define a cell and describe the structure of a typical human cell.
Answer:
A cell is the smallest structural and functional unit of life. All living organisms are made up of cells, and all cells arise from pre-existing cells.
A typical human cell has three main parts:
Thin, flexible, semi-permeable outer covering
Composed of lipids, proteins, and carbohydrates
Protects the cell and regulates entry and exit of substances
2. Cytoplasm
Jelly-like substance between cell membrane and nucleus
Contains cytosol and cell organelles
Site of most metabolic activities
3. Nucleus
Control center of the cell
Contains DNA and chromosomes
Regulates cell division and cellular activities
Thus, the cell maintains structure, function, and continuity of life.
2. Describe the structure and functions of the plasma membrane.
Answer:
The plasma membrane is the outermost covering of the cell and plays a vital role in maintaining cellular integrity.
Structure:
Thin, living, semi-permeable membrane
Made up of phospholipids, proteins, and carbohydrates
Described by the fluid mosaic model
Functions:
Protects the cell from external damage
Maintains shape of the cell
Regulates movement of substances
Helps in cell communication and recognition
Maintains internal environment of the cell
3. Describe the structure and functions of the nucleus.
Answer:
The nucleus is a large, spherical organelle that controls all cellular activities.
Structure:
Nuclear membrane (double layered)
Nucleoplasm
Nucleolus
Chromatin
Functions:
Controls metabolic activities of the cell
Stores genetic material (DNA)
Regulates cell growth and reproduction
Plays a key role in protein synthesis
4. Describe mitochondria and explain why they are called the powerhouse of the cell.
Answer:
Mitochondria are double membrane-bound organelles present in eukaryotic cells.
Structure:
Outer smooth membrane
Inner folded membrane forming cristae
Inner space called matrix
Functions:
Site of cellular respiration
Produces energy in the form of ATP
Regulates apoptosis
Provides energy for cellular activities
Because mitochondria produce energy required for all life processes, they are called the powerhouse of the cell.
5. Describe the structure and functions of cytoplasm.
Answer:
The cytoplasm is the semi-fluid substance present between the cell membrane and the nucleus.
Functions:
Houses cell organelles
Site of biochemical reactions
Helps in transport of materials
Maintains shape of the cell
Supports cellular metabolism
6. Describe mitosis and mention its significance.
Answer:
Mitosis is the division of somatic cells resulting in two identical daughter cells.
Stages of Mitosis:
Prophase
Metaphase
Anaphase
Telophase
Significance:
Growth and development
Repair of damaged tissues
Replacement of worn-out cells
Maintains chromosome number
7. Describe meiosis and explain its importance.
Answer:
Meiosis is a type of cell division occurring in germ cells.
Features:
Two successive divisions
Produces four daughter cells
Daughter cells are genetically different
Chromosome number reduced to half
Importance:
Formation of gametes
Maintains chromosome number in species
Introduces genetic variation
8. Describe the functions of different cell organelles.
Answer:
Different cell organelles perform specific functions:
Mitochondria: Energy production
Ribosomes: Protein synthesis
Endoplasmic reticulum: Synthesis and transport
Golgi apparatus: Packaging and secretion
Lysosomes: Intracellular digestion
Nucleus: Control and regulation
Together, these organelles ensure proper functioning of the cell.
9. Explain the differences between mitosis and meiosis.
Answer:
| Feature | Mitosis | Meiosis |
|---|---|---|
| Occurs in | Somatic cells | Germ cells |
| Divisions | One | Two |
| Daughter cells | Two | Four |
| Genetic nature | Identical | Different |
| Chromosome number | Maintained | Reduced |
10. Explain the importance of studying cell biology in nursing.
Answer:
Knowledge of cell biology is essential in nursing because:
Helps understand disease processes
Explains tissue repair and healing
Builds foundation for anatomy and physiology
Aids in understanding growth and development
Supports clinical decision-making
Exam-Oriented Writing Tips (10 Marks)
Begin with a clear definition
Use headings and subheadings
Draw neat, labeled diagrams if permitted
Write answers in logical sequence
Underline key terms
Conclusion
Long answer questions from The Cell: Structure, Reproduction and Functions are important for nursing examinations. Writing well-structured, point-wise answers helps students score high marks and develop strong conceptual understanding.
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