Sexual reproduction decreases the genetic variation of a species
Indicate whether the statement is true or false
FALSE
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Which of the following is not true of repairing double-strand breaks by recombination?
A. After invasion of the homologous chromosome, the 3' end of the invading strand acts as a primer for DNA synthesis. B. The broken ends are processed, with the 3'-ending strand selectively degraded to create 5' overhangs. C. The 3' single strand extensions invade the homologous chromosome, displacing the homologous strand and base pairing with the complementary strand. D. As a result of the two strand invasions, the two homologues are linked at two places and are called a branched intermediate. E. The enzymes required for strand invasion belong to a class of proteins called recombinases.
Noncompetitive inhibition is best described as
A. the end product binding to enzyme in noncompetitive site. B. the substrate binding to enzyme in a regulatory site. C. an anabolic reaction. D. the substrate binding to DNA, blocking enzyme transcription. E. the end product binding to DNA, blocking enzyme transcription.
When a metabolic block occurs in a biochemical pathway, it is common for the amount of the substance immediately prior to that block to increase
Indicate whether the statement is true or false
The productivity of an ecosystem usually ________ through succession
Fill in the blank(s) with correct word