Targeting the Ribosome and Treating Bacteria

Ribosome Composition
- Ribosomes are composed of subunits.
- Ribosomes are produced in a specialized region called the nucleolus, which is located inside the nucleus of a cell.
- Ribosome assembly involves the following steps:
- Ribosomal components are encoded by DNA.
- The ribosomal subunits are synthesized as individual pieces.
- These pieces move to the nucleus and then into the cytoplasm for assembly into functional ribosomes.

Subunit Variations
- Ribosomes from humans and bacteria exhibit significant differences in their subunits.
- Although they share some similarities, the chemical structures are not identical.

Streptomycin as an Example
- The antibiotic streptomycin selectively targets a specific ribosomal subunit in bacteria.
- This specificity is due to minor differences between bacterial and human ribosome subunits.
- Streptomycin binds to bacterial ribosomes and inhibits their function but does not affect human ribosomes, resulting in:
- Effective inhibition of protein synthesis in bacteria.
- No negative impact on human protein synthesis.
Narrow Spectrum vs. Broad Spectrum Antibiotics
- Antibiotics are often categorized based on their specificity:
- Narrow Spectrum Antibiotics
  - Specifically target certain species or groups of bacteria.
  - Example: Streptomycin, which affects bacteria without harming human cells.
- Broad Spectrum Antibiotics
  - Effective against a wide range of bacteria.
  - Useful in treating infections caused by multiple bacterial species.

General Bacterial Structure
- All bacteria possess a structure known as the cell wall which helps maintain their shape and provides protection.

Antibiotic Testing
- In the upcoming experiment, each type of bacteria will be treated with three different antibiotics.
- The purpose is to observe the effects of these antibiotics on varying bacterial strains.