A feature of both restriction enzymes and CRISPR systems is the recognition of (palindromes/primers/spacers)
Fill in the blank(s) with the appropriate word(s).
palindromes
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A common motif found in transposons and integrases is the DDE motif. Which of the following is a true statement with regard to the DDE motif?
A. This motif refers to the three consecutive amino acids that are found in the primary sequence of transposons and integrases. B. This motif refers to the presence of three amino acids not arranged consecutively in the proteins primary sequence but present together in the active site. C. The DDE motif is composed of two glutamates and one aspartate. D. Conservation of the DDE motif has not been useful in demonstrating evolutionary relatedness among transposases and integrases. E. The DDE motif is a structural similarity but has no functional relation in transposases and integrases.
Which of the following is not an advantage of anaerobic sludge digestion?
A. Heavy metals are concentrated in the sludge. B. Most of the biomass produced aerobically is used for methane production. C. The remaining sludge can be dried easily before disposal. D. All of these choices are correct.
Enzymes function by
a. being consumed (used up) in the reaction. b. lowering the activation energy of a reaction. c. combining with otherwise toxic substances in the cell. d. adding heat to the cell to speed up the reaction.
Frequencies of inversions and/or allele frequencies often vary regularly when examined over a geographic area changing in either latitude or climate. This type of regular change is called a ________
A) zonality B) cline C) gradient D) biome