Question

Escherichia coli has the following combination of characters.

• A. Rod shaped, 1-3$\mu$m long, gram negative
• B. Rod-shaped, 1- 3$\mu$m long, gram positive
• C. Spiral, 1-3$\mu$m long, gram negative
• D. Spiral, 1-3$\mu$m long, gram positive

Answer 1

The correct option is A Rod shaped, 1-3$\mu$m long, gram negative

• Esherichia coli or E.coli is a bacteria hence belongs to the kingdom Monera
• E.coli is a rod-shaped bacteria measuring 1-3 μm in length and 0.4 - 0.7 μm in width.
• E.coli are facultatively anaerobic gram-negative enteric bacilli.

• They are commonly found in the intestinal tract of man and other animals.

So the correct answer is option A.