Which Disorder Is Characterized by Persistent or Recurring Obstruction of Airflow

question 18

Multiple Choice

Which disorder is characterized by persistent or recurring obstruction of airflow that worsens with exertion?

• A)Laryngeal cancer
• B)Chronic obstructive pulmonary disease
• C)Tuberculosis
• D)Pulmonary embolism

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Definitions:

DNA Ligase

Enzyme that catalyzes the joining of the 5′ and 3′ ends of two DNA fragments; essential in DNA replication and used in recombinant DNA technology.

Excision Repair Enzymes

A class of enzymes involved in the repair of DNA by recognizing and removing damaged or mismatched nucleotides, followed by filling in the correct sequences.

UV Rays

Short-wavelength ultraviolet radiation that is not visible to the human eye, capable of causing skin burns, eye damage, and other health issues.

Telomerase

An enzyme that adds specific DNA sequence repeats ("telomeres") to the ends of DNA strands in the telomere regions, thereby extending the life of cells.