Why is a washing step necessary during an ELISA assay?

  Give a reason why DNA makes a better material than RNA for the storage of genetic information, and explain your answer.  

A jar contains 4 red marbles numbered 1 to 4 and 8 blue marbles numbered 1 to 8. A marble is drawn at random from the jar. Find the probability of choosing a red 8.

Citric acid reacts with \(\ce{NaOH}\) via the following chemical equation. $$\ce{3NaOH(aq) + H_{3}C_{6}H_{5}O_{7}(aq) -> Na_{3}C_{6}H_{5}O_{7} (aq) + 3H_{2}O}$$ A \(60.00~\text{mL}\) sample of citric acid is titrated with \(0.0361~M~\ce{NaOH}\text{.}\) At the endpoint, it is found that \(38.23~\text{mL}\) of titrant was used. What was the concentration of the citric acid?

  Telomeres serve as caps protecting the ends of linear chromosomes. Which of the following is FALSE regarding the replication of telomeric sequences?  

In order to determine the amount of chloride ions in a solution by using gravimetric analysis, which of the following should you add to the solution?

In basic solution the chromate ion, \(\ce{CrO_{4}^{2–}}\), can be converted to the chromite, \(\ce{CrO_{2}^{–}}\), ion. In this reaction the chromium atom electrons.

  What functional group is found at the 5’ end of a DNA strand?  

  Which of the following pairs of codons might you expect to be read by the same tRNA as a result of wobble?     Table 7-1  

Predict the products and write the complete balanced chemical equation for each of the following. If no reaction occurs write NR. \(\ce{AgNO_{3}(aq) + HBr}\) \(\ce{Ag(s) + HCl(aq)}\) \(\ce{H_{2}SO_{4}(aq) + Na_{2}CO_{3}(aq)}\) \(\ce{Zn(s) + FeCl_{2}(aq)}\) \(\ce{KI(aq) + (NH_{4})_{2}SO_{4}}\) The Activity Series