The number of different proteins a cell can produce is often much larger than the number of genes in
that cell. Indicate whether the statement is true or false.
T
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In the process of transcription, promoters are specific sequences of ________ that are recognized by ________
A) DNA / DNA polymerase B) RNA / DNA polymerase C) DNA / sigma factors D) RNA / ribosomes
A millicurie, a unit of radioactivity, is
a. a tenth of a curie. b. a hundredth of a curie. c. a thousandth of a curie. d. a millionth of a curie.
Human Hox genes are in four clusters: HOXA, HOXB, HOXC, and HOXD, for a total of 39 genes. Besides conserving the clustering of genes, evolution has also conserved __________
A) their chromosomal locations B) the order of the genes within them C) their expression along the dorsal-ventral axis D) the mutations to which they give rise E) their bilateral symmetry
No matter what model is used to show community succession, the final stage is always
A. a community at equilibrium. B. a stable community. C. a secondary community. D. a climax community. E. a disturbed community.