Select the incorrectly-matched vertebrate and its urine concentration relative to its blood.
A. amphibians—isotonic
B. desert mammals—strongly hypertonic
C. marine mammals—strongly hypertonic
D. marine reptiles—isotonic
E. terrestrial birds—weakly hypertonic
A. amphibians—isotonic
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A frameshift mutation could result from _____
A) a base insertion only B) a base deletion only C) a base substitution only D) deletion of three consecutive bases E) either an insertion or a deletion of a base
Using the drawing of mRNA below, choose the letter that best fits the description. Translation is often regulated by sequences in this region. ____
What will be an ideal response?
A mutation of a segmentation gene can result in
A. duplication of body parts. B. missing body regions. C. replacement of one body part with another. D. altered expression of homeotic genes. E. A segmentation gene mutation can cause all of these changes.
To answer questions 76–80 refer to the four items listed below
a. cDNA b. restriction enzyme c. reverse transcriptase d. gene library M 76. This is from a viral source and catalyzes reactions to construct DNA strands from mRNA. M 77. This is any DNA made from mRNA transcripts. M 78. This is a nuclease whose only function is to cut apart foreign DNA entering a cell. M 79. These are collections of host cells that house cloned DNA. M 80. This is an enzyme used to produce cDNA.