Resultado de búsqueda
Example: Add up the first 10 terms of the arithmetic sequence: { 1, 4, 7, 10, 13, ... } The values of a, d and n are: a = 1 (the first term) d = 3 (the "common difference" between terms) n = 10 (how many terms to add up) So: Becomes: = 5(2+9·3) = 5(29) = 145 . Check: why don't you add up the terms yourself, and see if it comes to 145
Other sequences include cube numbers (cubic sequences) and triangular numbers. Another common type of sequence in exam questions, is fractions with combinations of the above. Look for anything that makes the position-to-term and/or the term-to-term rule easy to spot.
The double stranded oligos were designed to have the indicated number of base pairs from the end followed by the recognition sequence and an additional 12 bases. In some cases asymmetric cleavage was observed and interpreted as a negative result.
DNA sequencing is the process of determining the nucleic acid sequence – the order of nucleotides in DNA. It includes any method or technology that is used to determine the order of the four bases: adenine, guanine, cytosine, and thymine.
A related sequence is the sequence of decimal digits of π, that is, (3, 1, 4, 1, 5, 9, ...). Unlike the preceding sequence, this sequence does not have any pattern that is easily discernible by inspection. Other examples are sequences of functions, whose elements are functions instead of numbers.
Additional strategies are also possible with individual organisms, based on the special features of their genomes. For example, vertebrate genomes contain CpG islands upstream of many genes , these being sequences of approximately 1 kb in which the GC content is greater than the average for the genome as a whole.
First we should check that these sequences really are arithmetic by taking differences of successive terms. Doing so will reveal the common difference \ (d\text {.}\) \ (5-2 = 3\text {,}\) \ (8-5 = 3\text {,}\) etc. To get from each term to the next, we add three, so \ (d = 3\text {.}\)
