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BIO 101: MODULE 4 PRACTICE EXAM

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BIO 101: MODULE 4 PRACTICE EXAM In a nucleosome, the DNA is wrapped around _____________________. A.) A thymine dimer B.) Satellite DNA C.) Polymerase molecules D.) Histones E.) Ribosomes - correct answer-D.) Histones Imagine that you've isolated a yeast mutant that contains histones resistant to acetylation. What phenotype do you predict for this mutant? A.) The mutant will show high levels of gene expression B.) The mutant will grow rapidly C.) The mutant will show low levels of gene expression D.) The mutant will require galactose for growth - correct answer-C.) The mutant will show low levels of gene expression Why do histones bind tightly to DNA? A.) Histones are negatively charged, and DNA is positively charged B.) Histones are highly hydrophobic, and DNA is hydrophilic C.) Both histones and DNA are strongly hydrophobic D.) Histones are covalently linked to the DNA E.) Histones are positively charged, and DNA is negatively charged - correct answer-E.) Histones are positively charged, and DNA is negatively charged In eukaryotes, the normal or default state is that genes are turned ________________.

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BIO 101
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BIO 101

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BIO 101

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