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Thursday, March 5, 2015

3

DNA translation happens at the site of the ribosome for the purpose of protein synthesis.

1. Initiation

2. Elongation

3. Termination

A schematic diagram shows the transcription and translation processes in three basic steps. First, DNA is transcribed into RNA, and then the new mRNA is processed to form a mature mRNA transcript. Finally, the mature mRNA is translated into a protein.
A table lists 64 different combinations of the nucleotides uracil (U), cytosine (C), adenine (A), and guanine (G) when they are arranged in three-nucleotide-long codons. The four possible identities of the first nucleotide in the codon are listed in a column on the left side of the table. The same four possible identities of the second nucleotide in the codon are listed in a row along the top of the table. The four possible identities of the third nucleotide in the codon are listed in a column on the right side of the table. The inside of the table is divided into a four by four grid. Each box in the grid contains all the codons that may result when combining the corresponding 1st, 2nd, and 3rd position nucleotides listed in the left column, top row, and right column, respectively. Colored spheres representing amino acids appear in the table beside the three-nucleotide codons that code for them.
A schematic illustration shows a region of DNA that contains a discrete transcription unit. The DNA is represented as a thin horizontal rectangle, and the transcription unit and its regulatory regions are represented by different colored rectangular regions clustered together along the DNA. The promoter region is represented as a green rectangular region near the left (three-prime) end of the DNA strand. The terminator region is represented as a black rectangular region near the right (five-prime) end of the DNA strand. The RNA-coding region, represented as a pink rectangular region, is between the promoter and the terminator. Arrows indicate transcription proceeds in a rightward direction from the transcription start site, where the promoter meets the RNA-coding region, to the transcription termination site, at the right-hand terminus of the terminator. The product of transcription is a five-prime to three prime (from left to right) MRNA transcript.
A schematic shows the formation of an initiation complex on an mRNA molecule in two stages. A summary diagram above the schematic shows the transcription and translation processes as two basic steps. The transcription step in the summary diagram is greyed out; the translation step is contained in a box to show it has been represented in more detail in the schematic below it. The schematic shows a segment of an mRNA molecule made up of 24 nucleotides. Each nucleotide is represented as a colored rectangle and is designated with the letter A, U, G, or C. The first stage shows the binding of the small ribosomal subunit, and the second stage shows the binding of an initiator tRNA carrying a methionine residue.
Label :
5 SBI4U: 3 DNA translation happens at the site of the ribosome for the purpose of protein synthesis. 1. Initiation 2. Elongation 3. Termination ...

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