Many eukaryotic operons are subject to numerous regulatory mechanisms
Indicate whether the statement is true or false.
ANS: F, prokaryotic operons
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Which of the following structural motifs promotes dimerization?
A. Zinc finger B. Leucine zipper C. Helix-turn-helix D. Helix-loop-helix
The formation of the bivalent during meiosis
A. is required for the pairing of homologous chromosomes. B. contributes to the genetic diversity of a species. C. ensures that the resulting haploid cells will have the same combination of homologous chromosomes as the original diploid cell. D. aids the alignment of sister chromatids in a single row along the metaphase plate. E. occurs during meiosis I and meiosis II.
Which of the following would not provide protection to the epidermis?
A. keratinized epithelium B. simple squamous epithelium C. stratified squamous epithelium D. layers of dead squamous cells
The __________ secretes aldosterone, which targets the kidney, and __________, the stress hormone. Fill in the blank(s) with the appropriate word(s)