An Iron Core Cannot Support a Massive Main-Sequence Star Because

question 83

Multiple Choice

An iron core cannot support a massive main-sequence star because:

• A) iron has low nuclear binding energy
• B) iron is not present in stellar interiors
• C) iron supplies too much pressure
• D) iron fusion only occurs in a degenerate core
• E) iron cannot fuse to make heavier nuclei and produce energy

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Definitions:

Kinase Enzymes

Enzymes that catalyze the transfer of phosphate groups from high-energy donor molecules to specific substrates, playing key roles in cellular signaling.

Proteolytic Processing

The cleavage of proteins into smaller polypeptides or amino acids, often activating or deactivating the protein's function.

Protein Degradation

The process of breaking down proteins into their constituent amino acids or peptides, usually by cellular enzymes.

Chemical Modification

The alteration of a chemical compound's structure through chemical reactions, often to change its properties or activity.