1. You are studying a new species of microorganism that was discovered at the bo
ID: 209673 • Letter: 1
Question
1. You are studying a new species of microorganism that was discovered at the bottom of the ocean and appears to have been isolated from other species for millions of years. You begin analyzing the species and you realize that it does still use the same four bases of DNA and RNA that are found in the rest of living organisms- you know this because you sequenced the DNA that encodes several proteins. However, when you begin to analyze its proteins, you realize that none of the proteins contain the amino acid Alanine, only the 19 other common amino acids. Assume that the organism uses the standard triplet code in explaining your a A. What are two possible explanations for why none of the proteins have the amino acid Alanine present? nswers. B. How would you determine whether either of these two possibilities are likely to be correct? If possible, please describe the experiment and include the experimental set-up used by Nirenberg and Leder if possible to test one of your hypotheses. Assume you can isolate the ribosomes and charged tRNAs from this species and specifically radiolabel each amino acid. 2. You are studying two missense mutations in a gene (lets call it X) that affects S. pneumoniae, such that the bacteria are not the normal S fom, but are instead the R form (remember the Griffiths experiment!). Because of technical limitations you cannot determine the nucleotide sequence of the gene but you are able to sequence the protein that is affected by the mutation and determine its complete amino acid sequence. You do know that the mutagen only induces singleExplanation / Answer
3: answer:
prokaryotic trascription is terminated by two different mechanisams, which are Rho dependent and Rho independent. Rho dependent is proteins based mechanism and Rho independent is a sequences dependent mechanism
4. answer:
Spicing is molecular mecghanism that remiove the introns and joining the exons. This proche tyoatess e is catalyse d by specilized RNA molecules called small nuclear RNA s and different proteins. The entire complex is called spliceosome.
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