Question

A student INCORRECTLY streaks the plate according to the diagram below, creating streaks in the order: a, b, c, d. Which of the following is a streaking error shown in the illustration?

a) Streak d does NOT draw inoculum from streak c.
b) Streak c does NOT draw inoculum from streak a.
c) Streak c goes outside quadrant 3.
d) Streak b draws inoculum from streak a.

Answer 1

The streaking error shown in the illustration is streak c does NOT draw inoculum from streak a.

Step-by-step explanation:

The streaking error shown in the illustration is option b) Streak c does NOT draw inoculum from streak a.

In streak plate method, it is important to draw inoculum from previous streaks in order to dilute the cells and spread them out over the agar surface. This helps in isolating individual colonies. Streak c in the illustration does not draw inoculum from streak a, which is a mistake in the streaking process.