The base analog, 5-bromouracil substitutes for the nucleotide base, _____________, in a DNA
molecule. Fill in the blank(s) with the appropriate word(s).
ANS: thymine
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If allele W has a frequency of 0.6, and allele w has a frequency of 0.4, what is the predicted frequency of heterozygous offspring?
a. 0.36 b. 0.24 c. 0.48 d. 0.16
The sting of imported fire ants can cause
a. fluid filled pustules that are slow to heal. b. nausea. c. dizziness. d. death. e. all of these.
Of the following, which cell structure would most likely be visible with a light microscope that has been manufactured to the maximum resolving power possible?
a. mitochondrion b. microtubule c. ribosome d. largest microfilament e. nuclear pore
What did Richard Axel and Linda Buck discover about the way in which we are able to perceive many different types of odors?
A. Vertebrate animals make a large number of distinct types of receptor proteins, each of which binds a particular odorant molecule or small group of such molecules. B. Odors are distinguished by the way in which they bind both olfactory and taste receptors-it is the overall "picture" generated this way that we perceive. C. Many different types of odors bind to just a few different types of receptor molecules. D. None of the answers are correct.