Why Does Myoglobin Have a Histidine That Prevents Both O₂

question 10

Multiple Choice

Why does myoglobin have a histidine that prevents both O₂ and CO from binding perpendicularly to the heme plane?

• A) This increases myoglobin's affinity for O₂.
• B) This increases myoglobin's affinity for CO.
• C) This lessens the difference in myoglobin's affinity for CO versus O₂.
• D) This prevents the iron of the heme from being oxidized.

---

Definitions:

Unconscious Processing

Mental processes not directly accessible to awareness or consciousness, influencing thoughts, feelings, and actions without our explicit awareness.

Flow of Consciousness

A term used in psychology and literature to describe a person's inner stream of thoughts, feelings, and awareness, often in a continuous flow.

Mind Wandering

A cognitive process of thoughts shifting away from a task towards unrelated concerns or fantasies, often occurring unconsciously.

Circadian Rhythm

The natural, internal process that regulates the sleep-wake cycle and repeats roughly every 24 hours.