Why do we so frequently use mutant alleles to determine structure and/or function of the wild type?
What will be an ideal response?
Mutant alleles create alternate versions of an existing protein that can provide important information about the normal function of the protein. When the wild-type function is lost, you can determine the phenotype of the organism and gain insights into the role of the protein. Similarly, if two different mutants phenocopy one another, you can identify redundant genes or members of the same gene pathway. You may find that mutations in one region of the protein may show no phenotypic effect, while other regions are highly important to normal protein function. Thus, you can begin to map the important conserved functional domains within your protein of interest if you have mutant alleles with different mutations in the same proteins.
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(a) xylem and phloem. (b) a windpipe. (c) a trachea. (d) the gametophyte as its dominant generation.
Which is true of listeriosis?
A. It is a foodborne disease. B. It may result in meningitis. C. It is usually asymptomatic in healthy people. D. It is caused by an organism that can grow at refrigerator temperatures. E. All of the choices are correct.
Which of the following is a characteristic of cancer cells?
A. Cells that spend 90% of their lifetime in interphase. B. Cells undergo highly regulated cell division. C. Cells exhibit contact inhibition. D. Cells with abnormal nuclei. E. Cells are able to differentiate and specialize.
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Fill in the blank(s) with correct word