NIC Nail Technician Written ExamScientific ConceptsHard
A client has a visible bacterial infection on their finger, characterized by redness, swelling, and warmth. The technician knows that bacteria are single-celled microorganisms that can cause disease and are classified by their shape. Which of the following bacterial shapes is spherical?
- ABacilli
- BFlagella
- CCocci
- DSpirilla
Show answer & explanationAnswer & explanation
Correct answer: C. Cocci
Bacteria are classified into three basic shapes: cocci (spherical), bacilli (rod-shaped), and spirilla (spiral or corkscrew-shaped). Flagella are hair-like appendages used for movement, not a shape classification of bacteria. Understanding these classifications is fundamental to understanding microbiology in a salon setting.
Why the other options are wrong
- A. Bacilli are rod-shaped bacteria.
- B. Flagella are whip-like appendages for movement, not a bacterial shape.
- D. Spirilla are spiral or corkscrew-shaped bacteria.
Bacterial Shapes
The distinct morphological classifications of bacteria, primarily based on their cell structure.
- Cocci: spherical
- Bacilli: rod-shaped
- Spirilla: spiral/corkscrew-shaped
Memory trick: Cocci are circles, Bacilli are bars, Spirilla are spirals.