What characteristics does an organism have to possess to be a good genetic model?
What will be an ideal response?
To be a good genetic model, an organism has to have a well-known genetic history, a short life cycle, produce many offspring, be easy to handle, and have genetic variability among the individuals in a population.
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The autoimmune response to desmosomes or desmosomal components (not hemidesmosomes) leads to a blistering skin disease known as
A) pemphigus. B) Ehlers?Danos syndrome. C) syndecan. D) junctional epidermolysis bullosa. E) listeriosis.
Which statement accurately describes the relationship between RNAi, small interfering RNA (siRNA), and miRNA?
a. They all describe different methods of post-translational gene regulation. b. miRNAs are classified into two types: RNAi molecules and siRNAs. c. RNAi occurs in two ways: by miRNAs or by siRNAs. d. RNAi is accomplished by siRNA and miRNA, but only siRNAs are cleaved by dicer proteins. e. miRNAs are transcribed from viruses while siRNAs are transcribed from nuclear DNA; both are types of
In relation to functional groups, what is an R-group?
a. An R-group is an abbreviation that denotes the addition of a phosphate to any functional group. b. An R-group is an abbreviation used to show any group to which the functional group is attached, usually at a carbon or hydrogen atom. c. An R-group indicates that the functional group was formed through dehydration synthesis. d. An R-group is an abbreviation for an acetyl group in inorganic chemistry.
Girdling a tree is eventually lethal because it prevents
a. water uptake. b. photosynthesis. c. respiration. d. sugar transport to roots. e. water transport to leaves.