Histone chaperones:
A. are required for direct assembly of the 30 nm filament.
B. are acidic proteins that bind individual histones and assemble them into dimer and tetramer forms.
C. can also modify the histones covalently by phosphorylation.
D. are acidic proteins that bind to H2A-H2B dimers and H3-H4 tetramers before assembly into nucleosomes.
E. can also modify the histones covalently by acetylation.
D
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Which of the following would NOT be true of cDNA produced using human brain tissue as the starting material?
A) It could be amplified by the polymerase chain reaction. B) It could be used to create a complete genomic library. C) It was produced from mRNA using reverse transcriptase. D) It could be used as a probe to detect genes expressed in the brain. E) It lacks the introns of the human genes.
In the following pedigree, the indicated trait is most likely caused by which type of allele?
A) autosomal recessive
B) autosomal dominant
C) X-linked recessive
D) X-linked dominant
E) Y-linked
__________ or __________ extend from many prokaryotic cells and serve in attachment and motility. Fill in the blank(s) with the appropriate word(s)
Plants lacking well-developed conducting systems such as mosses, liverworts, and hornworts have been called
A. gametophytes. B. angiosperms. C. bryophytes. D. gymnosperms. E. sporophytes.