New genetic variations sometimes become more common within populations because ____
a. most parts of the genome are non-coding and are available for selection
b. proteins can be "recruited" for advantageous function
c. proteins for which they code are advantageous and selected
d. adaptation occurs rapidly in the few species that have survived through time
e. mutations are able to select against genetic variations that had disadvantageous function
C
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What is the role of Rad51 in eukaryotic recombination events?
A. It introduces single-strand breaks in the chromosome. B. It degrades the 5'-ending strand to create 3'-ending single-strand overhangs. C. It is a helicase that assists in separating the DNA strands at the site of breakage. D. It is a single-strand DNA binding protein that coats the 3'-ending single-strand overhang. E. It is a RecA-class recombinase that mediates strand invasion.
Which of the following products are considered final products in the information flow within a cell?
A) DNA B) RNA C) protein D) lipid E) both choices B and C
The expected outcome of an oxidase test performed to identify Neisseria menigitidis is
A. a color change of a colony from tan to black when oxidase reagent is added. B. the amplification of the oxi gene as detected on an agarose gel. C. cells colored black when stained and viewed under the microscope. D. a zone of clearing surrounding colonies on chocolate agar. E. the appearance of bubbles when cells are mixed with hydrogen peroxide.
The cells of bone are called chondrocytes
____________________ Indicate whether the statement is true or false.