A Star's Evolutionary Track Is

question 114

Multiple Choice

A star's evolutionary track is

• A) its movement when plotted on a Hertzsprung-Russell diagram,as it evolves in luminosity and temperature.
• B) its motion through the dark,dense cloud from which it was formed,marked by a visible channel swept free of dust and gas.
• C) the line across the Hertzsprung-Russell diagram denoting stars identified as main-sequence stars.
• D) its movement when plotted on a map of the galaxy as it takes part in the overall galactic rotation.

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Definitions:

Hydrogen Bonds

Weak bonds formed between a hydrogen atom covalently bonded to one electronegative atom and another electronegative atom, playing a critical role in the structure of water and biological molecules.

Ionic Interactions

Forces of attraction or repulsion between ions or molecules with different charges.

Molecular Chaperones

Proteins that help other proteins fold properly. Although chaperones do not dictate the folding pattern, they make the process more efficient.

Tertiary Structure

The overall three-dimensional structure of a protein molecule, formed by the folding and coiling of its secondary structures into a unique shape.