What signals the end of the translation of an mRNA?
What will be an ideal response?
A STOP codon that causes the ribosomes, polypeptide, and mRNA to be released signals the end of the translation.
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Match the type of microscopy with the appropriate characteristic.
A) uses a laser to view a single plane of a specimen B) detects electrons passing through a specimen C) light passes directly through specimen D) detects electrons deflected from the surface of the specimen E) shows specific molecules F) amplifies variations in density 1) Brightfield 2) Fluorescence 3) Phase-contrast 4) Confocal 5) Transmission electron microscopy 6) Scanning electron microscopy
Why did local residents in the Pacific Northwest remain hostile to conservation efforts?
a. When the northern spotted owl was listed as endangered, logging workers lost jobs. b. The northern spotted owl has not been listed as endangered. c. When the northern spotted owl was listed as endangered, the logging industry experienced a boom. d. Conservation efforts to protect trees from logging have been unsuccessful. e. Conservation efforts focus on the local population and take their jobs into consideration.
A(n) _____ is a molecule into which a radioisotope has been incorporated
a. compound c. salt b. tracer d. acid
Consider each of the following crosses and determine which pair of animals belongs to the same species.
A. Horse ´ donkey—does not occur naturally; offspring sterile B. Eastern milk snake ´ coastal plain milk snake—occurs naturally; offspring fertile C. Lion ´ Tiger—does not occur naturally; offspring sterile D. None of these answers is correct.