1. Explore - Foundations of Viruses, Their Parts and Types
In this section, students build the scientific foundation needed to understand what viruses are and why they are unique biological entities. They explore how viral structure relates to function, how viruses replicate using host cells, and how viruses can be classified into different types. This Explore phase prepares learners for the next stages of the unit, where they will model viruses using 3D tools and visualize them in Augmented Reality (AR), transforming invisible biology into interactive learning objects.
1.2 Virus vs. Cell: Key Differences
To understand viruses, it is helpful to compare them with cells:
- Cells are living systems. They have a cell membrane, cytoplasm, and internal structures (organelles in eukaryotic cells). Cells can produce energy and reproduce on their own.
- Viruses are not complete living systems. They do not have cytoplasm, organelles, or metabolism. Outside a host cell, a virus is inactive.
This difference explains why viruses are often described as being on the border between living and non-living: they show life-like behavior only inside a host cell.
Example
A bacterium can live independently in many environments, while a virus infecting that bacterium (a bacteriophage) remains inactive until it finds the correct host.