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Life as we know it depends on the genetic code: a set of codons, each made up of three bases in a DNA sequence and corresponding mRNA sequence, that specifies which of the 20 amino acids will be added to the protein during translation.Imagine that a prokaryote-like organism has been discovered in the polar ice on Mars. Interestingly, these Martian organisms use the same DNA → RNA → protein system as life on Earth, except that______

User Cluster
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Final answer:

The genetic code is how nucleotides are translated into proteins through grouping into triplet codons. Each codon specifies one of the 20 amino acids or signals the end of protein synthesis. The student's question lacks full information on how the Martian genetic code differs from Earth's.

Step-by-step explanation:

The Genetic Code and Proteins

The genetic code is fundamental to all life forms, as it determines how the sequences of nucleotides in DNA and RNA are translated into proteins. During this process of translation, messenger RNA (mRNA) is decoded to synthesize proteins which involves grouping the four different bases (adenine (A), cytosine (C), guanine (G), and uracil (U) in RNA) into triplet codons. Each codon specifies an amino acid, leading to a chain that folds into a functional protein. The genetic code is made up of 64 codons, with 61 coding for the 20 standard amino acids and the remaining three representing stop signals that signal the end of protein synthesis.

As per your question, the genetic code on Earth and Mars is generally similar, with each triplet codon corresponding to a specific amino acid; however, you have not given the full information on how exactly the Martian genetic code differs from the one on Earth. If you can provide that additional detail, we can further discuss the implications of these differences and their potential impact on the Martian life forms discovered.

User Mfreiholz
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Answer:

In the most general case of x bases and y bases per codon, the total number of possible codons is equal to xy . In the case of the hypothetical Martian life-forms, is the minimum codon length needed to specify 17 amino acids is 5 (25 = 32), with some redundancy (meaning that more than one codon could code for the same amino acid). For life on Earth, x = 4 and y = 3; thus the number of codons is 43, or 64. Because there are only 20 amino acids, there is a lot of redundancy in the code (there are several codons for each amino acid).

Step-by-step explanation:

User AkraticCritic
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