Which One of the Following Classes of Histones Is Not

question 47

Multiple Choice

Which one of the following classes of histones is not a component of the core particle?

• A) H1
• B) H2A
• C) H2B
• D) H. H4

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Definitions:

Second Messenger

is a molecule inside cells that acts to transmit signals from a receptor to a target within the cell, such as cAMP or calcium ions.

Growth Factor

A naturally occurring substance capable of stimulating cellular growth, proliferation, healing, and cellular differentiation.

Tyrosine Kinase Receptor

A plasma membrane receptor that phosphorylates the tyrosine part of proteins; when a ligand binds to the receptor, the conformation of the receptor changes and it may phosphorylate itself as well as other molecules; important in immune function and serves as a receptor for insulin.

Ras Proteins

A family of proteins involved in transmitting signals within cells, playing a role in cell growth and development.