Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025
Definition
Bacillus is a genus of Gram-positive, rod-shaped bacteria that are known for their ability to form endospores. They are commonly found in soil and have various applications in biotechnology.
5 Must Know Facts For Your Next Test
Bacillus species can form durable endospores that allow them to survive harsh conditions.
Bacillus subtilis is a model organism for studying gene regulation and microbial genetics.
Some Bacillus species, like Bacillus anthracis, are pathogenic and can cause diseases such as anthrax.
Bacillus thuringiensis produces toxins used as bioinsecticides in agriculture.
The operon model of gene regulation was first described in Bacillus species, providing critical insights into bacterial genetics.
A resistant asexual spore that develops inside some bacteria cells, enabling survival under adverse conditions.
Gram-Positive Bacteria: A group of bacteria that have thick cell walls containing peptidoglycan and retain the crystal violet stain used in the Gram staining procedure.
Operon Theory: A model explaining how genes are regulated in prokaryotic cells through operons, which are clusters of genes under the control of a single promoter.