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Answer :
Q13. A. A genetic codon is composed of 3 nucleotides. Hence, condon is triplet in nature. For example, ATG is a codon containing 3 nucleotides.
Given DNA sequence is
5'- ATG GCG CGA CTG ACT - 3'
Therefore, the total number of nucleotides present in this sequence are 15.
Step by step
Solved in 2 steps
- just choose dont explain The alternating sugar-phosphate backbone of the DNA is hydrophobic Select one: True FalseWhich statements are true? Explain why or why not.1 Because the DNA double helix is only 2 nm wide—well below the limit of resolution of the light microscope—it is impossible to see chromosomes in living cells withoutspecial stains.2 A fluorescent molecule, having absorbed a singlephoton of light at one wavelength, always emits it at a longer wavelength.MULTIPLE CHOICE Read the questions below carefully. There is only one correct answer for each question. 1. In a DNA sample of Escherichia coli (a bacteria), 23.6% of the nitrogenous bases are thymine. What percentage of cytosine nitrogen bases is present in this sample? a) 76.4% b) 23.6% c)26.4% d) 52.8% 2. If the adenine is located on the Z strand as shown (see attachement 3) , then on the W strand, in the same place, we should find: a) Uracil b) Adenine c) Thymine d)Cytosine 3. Which of these deletions best represents a chromosomal deletion? (see options in attachment 3) 4. It is known that RNA is a nucleic acid responsible for the synthesis of proteins. However, there is another nucleic acid alongside RNA: DNA. What role does the latter play in relation to RNA? a) RNA is synthesized in the cell in case too large a mutation damages the DNA. b) DNA has the reproductive genetic code of all cells and passes it on to RNA. c) DNA directs the synthesis of enzymes, while RNA synthesizes…
- Show all work. 1. A) Produce a double-stranded piece of DNA that is 11 base pairs long using the letters A, C, G, T and label the ends of both strands using 3' and 5' appropriately. B) Calculate the ratio of (A+T)/(G+C) and (A+G)/(C+T). Explain why one ratio will always be equal to 1.0?Can somone check my answers are in bold please for both questions :Which is NOT true of the different conformations of DNA? A. Z-DNA is a left-handed spiral. B. Both A-DNA and B-DNA are dehydrated. C. A-DNA and B-DNA are right-handed spirals. D. A-DNA and Z-DNA segments are limited to short regions of DNA. For double-stranded DNA, consider the following base ratios: A/G C/T C/G (A+C)/(G+T) (A+G)/(C+T) (A+T)/(G+C) Which of those ratios always equals 1? A. 3, 4, and 5 B. 3 and 6 C. 1, 4, and 5 D. 4 and 6 E. 1 and 2Let’s return to your patient with sickle cell anemia. Below is the RNA sequence from your patient and from her mother. (The ••• represents another 30 nucleotides not written out here). The affected nucleotide is indicated in BOLD. Patient’s RNA: 5’ –CUAUGACAGAGUUC•••CAUUAGCCA – 3’ Mother’s RNA: 5’ –CUAUGACAGUGUUC•••CAUUAGCCA – 3’ A) Write out the first 10 nucleotides corresponding to the DNA sequence of the coding strand for your patient in the 5' to 3' direction. B) From the information you have been given, why is it not possible to accurately write out the DNA sequence as it would really be found in the genome? (ie, what you wrote down in part A is NOT necessarily what the DNA sequence would really look like if we could examine the chromosome directly - why? And no this has nothing to do with the 30 nucleotides that aren’t written out or the mutated base). Your answer should be 1-2 sentences maximum.
- 1.Draw these phosphorylated structures as they would be connected in a polinucleotide (e.g.RNA) in the order A-B. / Show how they combine to form the polynuleotide (i.e. only the end product). Show at any one of these structures where the glycosidic bond occurs 2.Sanger sequencing revealed the sequence of an oligonucleotide to be: d-AGATGCCTGACT. Draw a diagram of the gel banding pattern post capillary electrophoresis i.e. where on the gel would the fragments featureand set up a series of four dideoxy reactions (the dideoxy nucleotides are labeled with radioactive P32 ). You then separate the products of the reactions by gel electrophoresis and obtain the following banding pattern: a) Write out the base sequence of the newly synthesized strand from reading the gel (include the 5’ and 3’; end) b) Write out the base sequence of the original fragment you were given (include the 5’ and 3’ end)Make your DNA extraction buffer. Add 2 teaspoons of detergent, 1 teaspoon of salt, and ½ cup of water to one of the plastic cups. Stir well. 4 Open the bag of fruit and add 2 teaspoons of your DNA extraction buffer. What are cell membranes made of? Which parts are hydrophobic and which are hydrophilic? What does soap do to cell membranes? Why would this be helpful in extracting DNA? What function does the salt perform in the solution?
- Q.)The Bacteria Escherichia coli DNA genome has a molecular mass of about 3.1 X 109 In your answers, show how you came up to each result? (a) How many base pairs does this bacterium contain? (b) How many full double-helical turns does this DNA contain? (c) How long is this DNA in mm?Multiple Choice 1. A sample of normal double-stranded DNA was found to have adenine content of 17%. What is the expected proportion of cytosine? A. 33% B. 17% C. 83% D. 8.5% 2. Which of the following statement about nitrogenous bases is not true? A. Adenine and Uracil are complementary base pairings. B. Cytosine and Thymine are complementary base pairings. C. Cytosine and Uracil are pyrimidines. D. Adenine and Guanine are purinesMay you please help me with this? A sample of purified DNA was incubated with deoxyribonuclease (DNAse) at 37oC. An aliquot was removed from the reaction mixture every minute for 5 minutes and the A260 recorded. The following data were obtained. Time (min) A260 0 0.60 1 0.64 2 0.67 3 0.70 4 0.72 5 0.73 Describe the action of deoxyribonuclease on DNA and explain the increase in A260.