Samples of nucleic acid and chemical identity

Reference no: EM13196540

1. A friend brings you three samples of nucleic acid and asks you to determine each sample's chemical identity (whether DNA or RNA) and whether the molecules are double-stranded or single-stranded. You use powerful nucleotides and then determine the approximate relative proportions of nucleotides. The results of your assay follow. What can you tell your friend about the nature of these samples?
Sample 1: dGMP 13% dCMP 14% dAMP 36% dTMP 37%
Sample 2: dGMP 12% dCMP 36% dAMP 47% dTMP 5%
Sample 3: GMP 22% CMP 47% AMP 17% UMP 14%

2. A suspension of E. Coli was serially diluted through two dilutions of 100-fold each and two dilutions of 10-fold each. From the final dilution, a volumn of 0.1 ml was spread over nutrient agar in a petri dish and incubated overnight. The next day, 42 colonies were visible. Estimate the number of viable bacteria per milliliter in the original undiluted suspension.

Reference no: EM13196540

Questions Cloud

State vapor had reached the temperature of the boiling water : Would the following procedural errors cause an increase, a decrease, or no change in your calculated molecular weight? Indicate clearly the reasoning in each case.

Drawing the budget set of a consumer with income : If the government imposes a quantity tax on the consumption of a good, it means that the consumer has to pay for each unit of the good its price plus the tax.

What was the social-economic-intellectual and cultural : What was the social, economic,intellectual, cultural, and gender role impact of Christianity on the United States?

Explain enough carbon to produce calcium carbide : How much heat in kilojoules is evolved or absorbed in the reaction of 244.0g of calcium oxide with enough carbon to produce calcium carbide?

Samples of nucleic acid and chemical identity : A friend brings you three samples of nucleic acid and asks you to determine each sample's chemical identity (whether DNA or RNA) and whether the molecules are double-stranded or single-stranded.

Legal tradition of the legal system : Compare and contrast the U.S. and England's Applicable legal tradition (s) of the legal system.

An acid-catalyzed dehydration of cyclobutylmethanol proceeds : Acid-catalyzed dehydration of cyclobutylmethanol proceeds via an E1 mechanism and gives two alkenes.

Find the best point estimate of the mean : A study of 35 golfers showed that their averages score on a particular course was 92. The standard deviation of the sample is 5.

User Account

All Pages