In Condensed Chromosomes, Histone Spools

question 37

Multiple Choice

In condensed chromosomes, histone spools

• A) lie between introns in the DNA molecule.
• B) contain most of the spacer genes in a cell.
• C) have DNA wrapped around them.
• D) are sites where active transcription takes place.

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Definitions:

Hypothalamus

A region of the brain responsible for hormone production and regulation of vital bodily functions, including temperature, hunger, and thirst.

Oxytocin

A hormone released by the pituitary gland that causes increased contraction of the uterus during labor and stimulates the ejection of milk into the ducts of the breasts.

Calcitonin

A hormone produced by the thyroid gland that helps regulate blood calcium levels by lowering them when they are high.

Calcium Ion Concentration

The level of calcium ions (Ca2+) in a particular system, important for various cellular processes including signal transduction and muscle contraction.