Each Amino Acid Differs from Others Only by the

question 113

Multiple Choice

Each amino acid differs from others only by the

• A) number of central carbon atoms.
• B) characteristic of its R group.
• C) number of its carboxyl groups.
• D) number of peptide bonds in the molecule.
• E) size of its amino group.

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Definitions:

Aortic Semilunar Valve

A valve in the heart that lies between the left ventricle and the aorta, preventing backflow of blood into the ventricle.

Pulmonary Trunk

A major blood vessel that carries blood from the heart’s right ventricle to the lungs for oxygenation.

Pulmonary Arteries

are the arteries that carry deoxygenated blood from the heart to the lungs for oxygenation.

Myocardial Contraction

The phase of the cardiac cycle during which the heart muscle contracts, forcing blood out of the chambers.