Which type of bacteria clusters resemble grapes?

• A. Streptococci
• B. Staphylococci
• C. Bacillus
• D. Spirilla

Answer: (B)

The correct answer identifies Staphylococci as the type of bacteria that clusters resemble grapes. This term is derived from the Greek word "staphyle," meaning a bunch of grapes, due to the characteristic arrangement of these bacteria. Staphylococci are cocci-shaped bacteria that tend to form irregular clusters, similar to how grapes grow in bunches.

In contrast, streptococci, which are also cocci-shaped, typically align in chains rather than clusters, leading to a different formation that does not resemble grapes. Bacilli refer to rod-shaped bacteria, which naturally do not cluster in a manner resembling grapes, while spirilla are spiral-shaped bacteria that have a distinct corkscrew appearance. None of these shapes or arrangements match the grape-like clustering that defines Staphylococci.