Question

1 - As células da bactéria Escherichia coli têm formato cilíndrico, com 8 x 10−7 metros de diâmetro. O diâmetro de um fio de cabelo é de aproximadamente 1 x 10−4 metros. Dividindo-se o diâmetro de um fio de cabelo pelo diâmetro de uma célula de Escherichia coli, obtém-se, como resultado a) 200. B) 135 . C) 140. D) 125.

Answer 1

125

Explanation:

The cells of the bacterium Escherichia coli have a cylindrical shape, with 8 x 10−7 meters in diameter. The diameter of a hair is approximately 1 x 10−4 meters. Dividing the diameter of a hair by the diameter of a cell of Escherichia coli gives, as a result, a) 200. B) 135. C) 140. D) 125

We are carrying out division operation

The diameter of a hair ÷ The diameter of a cell of Escherichia

The cells of the bacterium Escherichia coli have a cylindrical shape = 8 x 10^−7 meters in diameter.

The diameter of a hair is approximately 1 x 10^−4 meters

Therefore:

1 x 10^−4 meters ÷ 8 x 10^−7 meters

= 125