A hemoglobin molecule contains ________ globular protein subunits

A) 1 alpha and 1 beta
B) 2 alpha and 2 beta
C) 2 alpha and 3 beta
D) 4 alpha
E) 4 beta


Answer: B

Anatomy & Physiology

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A) menstruation B) fertilization C) ovulation D) implantation

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The widest intervertebral discs are found in the ________ region

A) cervical B) thoracic C) lumbar D) sacral E) coccygeal

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Epithelial cells that are adapted for absorption usually have ________ at their free surface

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