Cystic Fibrosis Is Caused by a Mutation in the Gene

question 10

Multiple Choice

Cystic fibrosis is caused by a mutation in the gene that encodes which enzyme?

• A) Pyruvate kinase
• B) Hemoglobin
• C) Tyrosine kinase
• D) CFTR protein
• E) Hexosaminidase A

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Definitions:

Premature Atrial Contractions

Early heartbeats originating in the atria, often perceived as a skipped beat and usually benign but can indicate underlying health issues.

Atria

The upper chambers of the heart.

Inferior Vena Cava

The large vein that carries deoxygenated blood from the lower half of the body into the heart.

Right Atrium

The right upper chamber of the heart that receives deoxygenated blood from the body through the venae cavae and pumps it into the right ventricle.