Which of the following best describes coccus bacteria?

Which of the following is a characteristic shape of coccus bacteria?

Which of the following statements is true about coccus bacteria?

Which of the following arrangements can coccus bacteria form?

Coccus bacteria are round and spherical in shape.

University of Michigan - Ann Arbor

University of Wisconsin - Madison

Tulane University

Bacteria can be classified based on their different morphologies.
- Coccus
- Bacillus
- Vibrio
- Coccobacillus
- Spirillum
- Spirochete

Cell Morphologies

- Coccus
- Diplococcus
- Tetrad
- Streptococcus
- Staphylococcus 

Common Arrangements of Cocci

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These bacterial cells lack a cell wall, thus they do not have a stable shape. They may appear as round bodies or interlacing filaments. 

Mycoplasmas

Coccus

Bacterial cells that are rod shaped are bacilli. Bacilli are capable of forming endospores. 

Bacillus

These bacterial cells are curved rod shaped. 

Vibrio

Coccobacilli bacteria are short rod shaped bacteria. 

Coccobacillus

Spirilla are rigidly spiraled shaped bacterial cells.

Spirillum

Spirochete cells are longer and helical spiral bacterial cells. They are members of the Spirochaetota phylum of bacteria.

Spirochete

Pathogenic bacteria are bacteria that can cause infectious disease.

Pathogenic Bacteria

Which of the following bacterial morphologies is characterized by a spiral shape?

Which bacterial morphology is described as rod-shaped?

Which bacterial morphology is described as spherical in shape?

Which bacterial morphology is described as comma-shaped?

Diplococcus is the an arrangement of two cocci cells. 

Diplococcus

A tetrad is a grouping of four cocci in a square.

Tetrad

Streptococcus is a chain of cocci cells. It is also a diverse genus of bacteria that are further classified on which molecules they produce that can cause an immune response.

Streptococcus

Staphylococcus is a cluster of cocci cells.

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