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

question 5

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 supercoiling at or around H1
• B) methylation and phosphorylation of histone tails
• C) hydrolysis of DNA molecules where they are wrapped around the nucleosome core
• D) accessibility of heterochromatin to phosphorylating enzymes
• E) nucleotide excision and reconstruction

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Definitions:

AASB 2

An Australian Accounting Standards Board standard that specifies the accounting requirements for share-based payment transactions.

Option Pricing Models

Mathematical models used to determine the fair value of options, considering various factors such as the underlying asset price, strike price, volatility, and time to expiration.

Share-based Payment

Share-based payment is a transaction in which the entity acquires goods or services by issuing shares, share options, or other equity instruments, or by incurring liabilities to the supplier for amounts based on the price of the entity’s shares or other equity instruments.

Fair Value

The price at which one could sell an asset or the cost to assign a liability in a systematic transaction with individuals in the marketplace on the date of valuation.