The Difference Between Normal and Sickle-Cell Hemoglobin Is Based Upon

question 29

Multiple Choice

The difference between normal and sickle-cell hemoglobin is based upon

• A) the number of amino acids in the molecule.
• B) the substitution of one amino acid for another.
• C) the number and orientation of the amino acid chains attached to the heme portion of the molecule.
• D) the number of oxygen molecules that can be carried.
• E) the type of bone marrow that produces it.

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Definitions:

Water Conduction

Water conduction refers to the process of transporting water and dissolved nutrients throughout a plant or other organism.

Sclerenchyma Cells

Thick-walled, rigid cells that provide structural support to plants and are characterized by their high lignin content.

Sclereids

Specialized thick-walled cells found in plants that provide support and protection, contributing to the hardness of nuts and seeds.

Tracheids

Long, thin cells in plants that facilitate the transport of water and minerals upwards from the roots.