Down's Syndrome Is the Result Of

question 13

Multiple Choice

Down's syndrome is the result of:

• A)Environmental insult, usually during the birth process
• B)A recessive-gene disease
• C)A specific chromosomal abnormality
• D)None of the above; the cause is unknown.

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Definitions:

Feedback Inhibition

A type of enzyme regulation in which the accumulation of the product of a reaction inhibits an earlier reaction in the sequence; also known as end product inhibition.

Enzyme Activity

The measure of the rate at which an enzyme catalyzes a reaction, converting substrate molecules into products.

Metabolic Pathway

A series of chemical reactions in a cell that build up or break down molecules for vital processes.

β-galactosidase Enzyme

An enzyme that catalyzes the hydrolysis of β-galactosides into monosaccharides, primarily involved in lactose breakdown.