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BIO 101: Module 4 Practice Exam Questions And Answers With Verified Solutions 100% Correct!!!
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BIO 101: Module 4 Practice Exam Questions And Answers With Verified Solutions 100% Correct!!!
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BIO 101: Module 4 Practice ExamQuestions And Answers With Verified
Solutions 100% Correct!!!
In a nucleosome, the DNA is wrapped around _____________________.
A.) A thymine dimer
B.) Satellite DNA
C.) Polymerase molecules
D.) Histones
E.) Ribosomes - 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 - 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 -
ANSWER✔✔ E.) Histones are positively charged, and DNA is negatively charged
In eukaryotes, the normal or default state is that genes are turned
________________.
A.) On through their association with exons
B.) Off through their association with exons
C.) Off through their association in nucleosomes
D.) On through their association in nucleosomes - ANSWER✔✔ C.) Off through
their association in nucleosomes
Which of the following statements describes a eukaryotic chromosome?
A.) A series of nucleosomes wrapped around two DNA molecules
B.) A single linear molecule of double-stranded DNA plus proteins
C.) A single strand of DNA
D.) A chromosome with different numbers of genes in different cell types of an
organism - ANSWER✔✔ B.) A single linear molecule of double-stranded DNA
plus proteins
DNA methylation and histone acetylation are examples of
_____________________.
A.) Karyotypes
B.) Genetic mutation
C.) Translocation
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