Which of the following is NOT a commonly-used sterile technique for plating bacteria?
A. When pipetting, make sure to draw up some of the solution into the pipetting aid
B. Holding the test tube at a 45 degree angle in the air when removing the lid
C. Heating the inoculating loop over a flame until red-hot before using it to transfer bacteria
D. Storing the spreader in ethanol
Answer:A
Which of the following is NOT a commonly-used sterile technique for plating bacteria?
A. When pipetting, make sure to draw up some of the solution into the pipetting aid B. Holding the test tube at a 45 degree angle in the air when removing the lid C. Heating the inoculating loop over a flame until red-hot before using it to transfer bacteria D. Storing the spreader in ethanol