iPad? 8:38 PM 0 elearn.sinclair.edu ??100% Question 3 (1 point) If you have a te
ID: 133123 • Letter: I
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iPad? 8:38 PM 0 elearn.sinclair.edu ??100% Question 3 (1 point) If you have a test tube that contains 10 mL of bacterial culture that has a concentration of 656,000 cells/mL and you transfer 1 mL into the tube #1 containing 9 mL of sterile waterjand then remove 1mL from that tube and add to tube #2 (containing 9mL of sterile water) and then remove 1mL from tube #2 and add to the tube #3 (containing 9mL of sterile water). What is the final concentration of cells/mL of tube # 3? cells/mL 1) 65 2) 656 3)65600 4) 656000 5) 6560000 Save Next Page Page 3 of 10Explanation / Answer
A test tube contains 10 ml of bacterial culture that has a cincentraconc of 656,000 cells/mL.
1 ml of this is transferred to test tube 1 containing 9 ml of sterile water. The total dilution is 10 times. So, 1 ml of solution in test tube 1 contains 65600 cells/ml.
From test tube 1, 1 ml is added to to test tube 2 containing 9 ml of sterile water. So, the bacterial concentration in tube 2 is 6560 cells/ml.
From tube 2, 1 ml is added to tube 3 containing 9 ml sterile water. So, bacterial concentration in tube 3 is 656 cells/mL. (Option 2).
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