Which of the following is a 1:4 dilution?Group of answer choices15 uL PBS + 5 uL antibody16 uL PBS + 4 uL antibody20 uL PBS + 5 uL antibody20 uL PBS + 4 uL antibody

How much primary antibody should be added to prepare 14 mL solution of primary antibody with a dilution of 1:500?14 µL2.8 µL1.4 µL28 µL

An honours student needs to count the number of cells they have in a tube. They take an aliquot of the cells and dilute them 1:50 before loading 10 uL into a haemocytometer to perform a cell count. They count 4 quadrants and obtain the following counts for each quadrant: 12, 5, 17, 9.Which of the following statements is the most correct?Group of answer choicesThey should take the cells from the original flask, perform a new 1:5 dilution and repeat the cell countThe cells in the original flask are at a concentration of 5.4 x10^6 cells per mLThe cells in the original flask are at a concentration of 1.08 x 10^5 cells per mLThey should take the cells from the original flask, perform a new 1:100 dilution and repeat the cell count

he quantity of antibodies in serum is called Blank______.Multiple choice question.titerunitsload

In Part A, seven dilution series sample solutions were made from stock solutions of 1M HCl and 1M NaOH. Match the sample number to the correct concentration.Group of answer choicessample 1 (HCl stock solution)sample 2 (first diluted HCl solution)sample 3 (second diluted HCl solution)sample 4 (third diluted HCl solution)sample 5 (NaOH stock solution)sample 6 (first diluted NaOH solution)sample 7 (second diluted NaOH solution)

A dilution ratio of 1:10 means there is _______ul of stock in 10 ul of final volume.