A Star in the Instability Strip Pulsates Because

question 1

Multiple Choice

A star in the instability strip pulsates because

• A) the energy produced by the core is not constant.
• B) the energy produced by the hydrogen burning shell is not constant.
• C) the core of the star is composed of helium and degenerate electrons.
• D) the surface temperature of the star is increasing.
• E) density and opacity of the helium ionization zone changes with time.

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Definitions:

Pyrimidine

One of the two types of nitrogenous bases found in nucleic acids, including cytosine, thymine (in DNA), and uracil (in RNA).

DNA Ligase

Enzyme that seals strand breaks or gaps in double-stranded DNA.

DNA Synthesis

The natural or artificial creation of deoxyribonucleic acid molecules, crucial for genetic replication and transmission.

Hydrogen Bonds

A fragile connection between two molecules caused by the electrostatic pull between a proton in one molecule and an atom with high electronegativity in the other.