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1. If the primary transcript of a eukaryotic gene has 3 exons: exon 1| intron 1 | exon 2| intron 2 | exon 3a. What would the mature mRNA look like if all intron splice sites were functional?b. What would the mature mRNA look like if the 5' splice site of intron 1 was blocked?c. What effect would such a mutation likely have on the protein translated from the mRNA?d. What does the branch point nucleotide normally do during splicing?e. What additional processing must these transcripts undergo besides splicing before they are exported from the nucleus?
2. Why does the RNA polymerase complex in eukaryotes contain a histone acetylase?
3. What is the function of the 5'cap in eukaryotic mRNA?
4. Why is the genetic code degenerate?
5. In translation, the first AUG codon of a eukaryotic mRNA transcript is mutated by replacing the A with a C.a. How does this affect the primary structure of the synthesized polypeptide?b. In a frame shift mutation, one base is either added or deleted. How does this mutation change the function of the protein produced?c. Why is a mutation in the third position of a codon often called a silent mutation?
6. Briefly, explain how the ribosome can distinguish the initiating AUG codon from the AUG codons that specify a polypeptide's internal Met residues in prokaryotes and eukaryotes.
7. What is the minimum number of tRNAs required to recognize all the codons for Threonine? Give the anticodon sequences of this tRNA and indicate which codon(s) each one recognizes.
What best describes the difference between incomplete and complete metamorphosis?
Which division of the nervous system may be involved in Guillain-Barre syndrome and Do you think that the paralysis found in the Chinese children affect both sensory and somatic motor neurons? Why or why not?
What was the most surprising thing you learned all quarter? What were your impressions or preconceived ideas of vaccines/vaccination? What was your opinion on vaccines/vaccination before the class began?
Explain the view of evolution put forth by Georges Cuvier. What was the term he used? How did Charles Lyell and James Hutton influence Darwin on hisvoyage?
Why do you plate only a small amount of the bacterial solution on the Ampicillin-treated plates, and an even smaller amount on the plates without Ampicillin, when you are trying to calculate transformation efficiency.
When two or more elements combine chemically in definite proportions this makes up a?
1. bacteriophage m13 infects e. coli differently from the way bacteriophage t2 does. the m13 coat is removed in the
Explain the process of photosynthesis and why it is important. What happens during photosynthesis in areas that have a change of seasons
Why do Americans generally have such a negative and fearful approach to aging? Is this a part of our larger fear of death and dying? How might the emotional needs of dying people be better served in your local community?
In Drosophila melanogaster, a gene "ebony" produces a dark body colour when homozygous, and an independently assorting gene "black" has a similar effect (that is the black and ebony body colours are indistinguishable).
Draw the metabolic pathways for Glycolysis, the Krebs cycle, and the electron transport chain. Indicate at the right the total number of ATP and NADH produced or consumed.
A geneticist crossed wild, gray-colored mice with white (albino) mice. All the progeny were gray. These progeny were intercrossed to produce an F2, which consisted of 198 gray and 72 white mice. Propose a hypothesis to explain these results, diagr..
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