Hemoglobin a Differs from Hemoglobin S in Having Two More

question 122

Multiple Choice

Hemoglobin A differs from hemoglobin S in having two more anionic groups (both hemoglobins have a molecular weight of approximately 67,000) . Which one of the following separation methods is most likely to distinguish between these two hemoglobins?

• A) Precipitation with ethanol
• B) Gel filtration
• C) Ultracentrifugation
• D) Electrophoresis

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Definitions:

Delta Waves

Slow brain waves primarily associated with deep sleep and brain pathology.

Sleep Spindles

Bursts of oscillatory brain activity visible on an EEG that occur during stage 2 of sleep, thought to play a role in learning and memory.

Alpha Waves

Brain waves that indicate a state of relaxation or light meditation, typically with a frequency of 8 to 12 hertz.

REMs

Rapid Eye Movements, a phase of sleep characterized by quick movements of the eyes, associated with dreaming and increased brain activity.