The Toxic Superoxide Ion Is Converted to Harmless Oxygen by Two

question 90

Multiple Choice

The toxic superoxide ion is converted to harmless oxygen by two enzymes,  ________.

• A)catalase and hydrogen peroxidases
• B)superoxide dismutase and hydrogen peroxidases
• C)superoxide dismutase and catalase
• D)catalase and oxidase
• E)superoxide dismutase and oxidase

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Definitions:

Intestinal Villi

Small, finger-like projections that extend into the lumen of the small intestine, greatly increasing its surface area for nutrient absorption.

Intestinal Glands

Glands located in the lining of the small and large intestines that secrete digestive enzymes and other substances to aid in digestion and nutrient absorption.

Pharynx

The muscular tube that connects the mouth and nasal passages to the esophagus and larynx, serving both respiratory and digestive functions.

Primary Teeth

The first set of teeth in the development of humans and other mammals, also known as baby or milk teeth, which are eventually replaced by permanent teeth.