In a sample dsDNA from an organism, the amount of thymine is analyzed to be 12 μmoles when the A+T/G+C ratio is 6.0. How much cytosine should be in the sample? 3 3.5 4 2
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In a sample dsDNA from an organism, the amount of thymine is analyzed to be 12 μmoles when the A+T/G+C ratio is 6.0. How much cytosine should be in the sample?
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- According to Chargaff’s rules for DNA base composition, if a DNA sample contained 10% guanine, the sample should have: A. 40% cytosine B. 90% cytosine C. 10% adenine D. 40% thymineIf the DNA of an organism contains 20% adenine, what is its percentage of guanine? a.20% b.60% c.80% d.30%If 15 percent of the nitrogenous bases in a sample of DNA from a particular organism is thymine, what percentage should be cytosine? Group of answer choices 35% 70% 30% 15% 40%
- In primer designing, which of the following statements is correct? a. Primers should be 18-24 bases in length. b. Base composition should be 45-55% (G+C). c. Melting temperatures between 55-70°C are preferred. d. All choices are correct.If DNA of a particular species was analyzed and it was found that it contains 27 percent A, what would be the percentage of CA DNA molecule consists of 500 nitrogenous bases, of which 150 are G bases. So, the percentage of nitrogenous base T is equal to? choose the correct answer A)20% B)30% C)40% D)60%
- What is the 260/280 ratio when quantifying DNA? select the correct option below A. ratio of protein to impurities in sample B. ratio DNA to impurties in sample C. ratio of DNA to protein in sample D. ratio of DNA to RNA in sampleYou have a 20 mg/ml of Ethidium bromide stock solution. You need to a final concentration of 2ug/ml into a Agarose solution to visualize DNA. What is the dilution factor? Give typing answer with explanation and conclusionWhat will happen to the concentration and the A260/280 ratio of the DNA sample in the following scenarios? a)Add to low % ethanol. b) Add too little salt. C) Forget to boil the sample
- In 1950, using “blender” experiment, Hershey and Chase demonstrated that DNA, not protein, is the genetic material. They labeled proteins with radioactive phosphorus and nucleic acids with radioactive sulfur. A. Both statement is correct B. Both statement is incorrect C. Statement 1 is correct. Statement 2 is incorrect D. Statement 2 is correct. Statement 1 is incorrectWhy is there a difference between how the DNA looks between a whole food sample (strawberry or peas) and a processed sample (chocolate or gummy)? Compare two samples: a fresh sample and a processed sample. Describe how they appear differently and describe why they appear differently.TRUE or FALSE a) The deoxyribose connects to N9 of guanine. b) In a dsDNA, a pyrimidine in one chain is always paired with a purine on the other chain because of this arrangement, the molecule is 2nm wide along its entire length. Example is A with G or C with T.
