a) There are three different in each codon, and each of thesenucleotides can have one of four different bases. How many possibleunique codons are there?

b) If DNA had only two types of bases instead of four, how longwould codons need to be to specify all 20 amino acids?

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Beverley SmithLv2

30 Dec 2018

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Related questions

8a. Imagine a scenario in which codons consisted of two bases instead of three, but in which there were still 20 amino acids that could be incorporated into proteins during translation. How many codons would be possible with a two-base codon system? [2 points]

8b. In order for such system to code for 20 amino acids, some codons will have to be âambiguous.â Explain why. [4 points]

1. Other features of the reading of mRNA into proteins being the same as they are now (i.e., codons must exist for 20 different amino acids), what would be the minimum codon length be if the number of different bases in the mRNA were each of the numbers below, instead of four? You must show all work to receive credit.

a. Two

b. Three

c. Five

The space probe HEA1 returns to earth following a trip to theplanet Tantoun. Analysis of samples from this planetreveals that proteins are composed of 16 different amino acids,while DNA contains only two bases: rosine (R) and ziadine (Z).

a. What is the minimum codon size in this genetic code? Explain yourreasoning.

b. How many of the codons in this minimum genetic code willcontain at least
two Zs? Explain your reasoning.