What is the function of SKI proteins?
What will be an ideal response?
Ans: SKI proteins function in the process of nonstop decay for mRNAs lacking termination codons. Without such a codon, the ribosome translates through the poly(A) tail and stalls at the 3? terminus, but is not released without a release factor. Ski7 binds to the ribosomal A site to release the mRNA from the ribosome, and recruits other SKI proteins and the exosome to facilitate 3? to 5? mRNA decay.
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A plant sustains pathogen-induced damage to one of its cell walls. A gene-for-gene response soon follows and the tissue surrounding the injury soon dies. Which signaling molecules facilitated this response?
A. Oligosaccharins B. Ethylene C. Gibberellins D. Auxins E. Abscisic acid Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about injury response in plants? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
If speciation occurs with the production of two or more species in a small area, ____ is (are) probably
responsible.
a. both sympatric and parapatric speciation b. either sympatric or parapatric speciation c. neither sympatric or parapatric speciation d. only sympatric speciation e. only parapatric speciation
In the life cycle of a fern, what is the name of the structure that produces the haploid spores?
a. sori b. rhizome c. gametophyte d. gametangium e. strobilus
Which of the following is not true of Claviceps
purpurea? a. It causes ergotism. b. It produces toxic alkaloids. c. It parasitizes rye. d. It may have played a role in the Salem witch trials. e. All of these are true