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17.5 The Genetic Code and Protein Synthesis
The bases are G with C, C with G, T with A, and A with U.
Equal amounts of A and T are found in the DNA.
The genetic code can be used to write the amino acid sequence.
The function of the different types ofRNA in the cell is to help with the synthesis of the proteins.
After the genetic information is transcribed, the nucleus of the cell is empty.
At the ribosomes, the genetic information is translated into a sequence of amino acids.
It was shown that repeating triplets of uracil produced a polypeptide that only contained phenylalanine.
The codons have been determined.
There are 64 codons from the triplet combinations of A, G, C, and U.
The three stop signals are UGA, UAA, and UAG.
There are other three-base codons shown.
GGU, GGC, GGA, and GGG are the codons of glycine.
There are two roles in the triplet AUG.
The initiation of a chain is signaled by STARTa codon.
Stopb codons signal the end of a chain.
The nucleus of an mRNA is moved into the ribosomes.
There is a difference between the 17.48 ent synthetase and the different amino acids.
When the ribosome is binding to the mRNA, the synthesis begins.
The hydrogen bonds to the next codon.
Sometimes a group of ribosomes translate the same strand of mRNA to produce several copies of the same polypeptide at the same time.
An activated tRNA.
In the translation process, the tRNAs pick up their amino acids, bind to the codon, and place their Protein Synthesis amino acids in a growing chain.
Successive tRNAs attach to and detach from the ribosome.
It prevents the growth of the not those in human cells.
Three-letter and one-letter abbreviations are used to write the amino acid sequence.
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