Ch. 12 HW ans key - Ch. 12 HW ans key MCQ: 1) 2) 3) 4) 5)...

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MCQ: 1) C 2) A 3) A 4) C 5) D 6) B 7) C True/ False: 1) T 2) F 3) F 4) T 5) F Match A and B: 1) e 2) g 3) a 4) b 5) f 6) c 7) d SQ: 1) supercoiling arises from overwinding (positive supercoiling) or underwinding (negative supercoiling) the DNA double helix when the DNA molecule does not have free ends, as in circular ds DNA or when the ends of the linear DNA molecule are bound to proteins that prevent them from rotating around each other. 2) Nucleosome: contains two molecules each of histone H2A, H2B, H3 and H4, which form a protein core with around 147 bp of DNA wound around the core. Chromatosome: Nucleosome core + one molecule of histone H1. 3) 3 different types of DNA sequences exist in eukaryotes; a) Unique-sequence DNA: constitute most of the protein-coding sequences as well as a large number of sequences without any known function. One or a few copies are present per haploid genome. b) Moderately repetitive sequences: ranging from a few hundred to few
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This note was uploaded on 07/04/2011 for the course BIO 325 taught by Professor Saxena during the Fall '08 term at University of Texas at Austin.

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Ch. 12 HW ans key - Ch. 12 HW ans key MCQ: 1) 2) 3) 4) 5)...

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