(You can answer part (a) and part (c) together if it is more convenient to do so). DRAW condensed structural (or line-angle) formulas for the four nucleotides of DNA (A, C, G, T), and identify each with their actual names (not just A, C, G, or T).
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- The composition (in molefraction units) of one of the strands of a double-helical DNA molecule is [A] = 0.30 and [G] =0.24. (a) What can you say about [T] and [C] for the same strand? (b) What can you say about [A], [G], [T], and [C] of the complementary strand?Draw the following trinucleotide: pGAUThe "D" in DNA stands for which of the following?
- The four nucleotides A,T,C,G are shuffled in a random order and put in a row. How many possible orderings are there? Now there are six nucleotides: A,A,C,C,C,C and they are shuffled and put into a row. How many possible orderings are there?DNA structure depends on base pairing of its four nucleotides, A, C, T, and G. Nucleotide A pairs with T, and nucleotide C pairs with G. This forms a four-letter DNA “alphabet." Because DNA codes for amino acids in sets of three nucleotides, there are 4 cubed (4'), or 64, possible combinations, coding for 20 different amino acids. What is the best explanation for why there is no selective advantage for DNA to have five nucleotides (e.g., A, C, T, G, and E) with C pairing with either G or functionally equivalent E? It would be impossible to form the DNA molecule, because it must have an equal number of Cs and Gs. Because G and E have the same role, there would still be four functional letters of the alphabet. Replication would be inaccurate because sometimes C would bond with G and sometimes C would bond with E. There would be a five-letter alphabet with 125 combinations, which is too numerous. It is impossible because there are not five known nucleotides in the cell.The base content of a particular DNA molecule is 36% Thymine. What is the percentage of each of the following bases in the molecule?
- Name the nucleotide.One gram of cultured human cells contains about 10^9 cells and occupies roughly 1 mL. if the average molecular mass of a base is 660 daltons and each cell contains 6,4 *10^9 bp, what mass of DNA is present in this one-gram sample? If all the DNA molecules in the sample were laid end to end to form a single thread. Would it be long enough to reach from the Earth to the Moon (385.000 kilometers).How many GB is a DNA?