When DNA Is Compacted by Histones into 10-Nm and 30-Nm

question 38

Multiple Choice

When DNA is compacted by histones into 10-nm and 30-nm fibers, the DNA is unable to interact with proteins required for gene expression. Therefore, to allow for these proteins to act, the chromatin must constantly alter its structure. Which processes contribute to this dynamic activity?

• A) DNA methylation and phosphorylation of histone tails
• B) hydrolysis of DNA molecules where they are wrapped around the nucleosome core
• C) accessibility of heterochromatin to phosphorylating enzymes
• D) binding of an inducer to a repressor molecule

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Definitions:

Test Power

The probability that a statistical test will correctly reject the null hypothesis when it is false, indicating a test's effectiveness.

False Null Hypothesis

Incorrect rejection of a true null hypothesis, often referred to as a Type I error in statistical hypothesis testing.

Confidence Interval

An encompassing array of values, from sample data statistics, perceived to contain the unknown value of a population parameter.

Population Mean

The average of all the values in a population, representing the central tendency.