Which Laboratory Specimens Must Be Treated with Standard (Universal) Precautions

question 5

Multiple Choice

Which laboratory specimens must be treated with standard (universal) precautions?

• A) Only those labeled with a biohazard sticker
• B) Only those from patients known to have human immunodeficiency virus (HIV) or hepatitis
• C) All human blood and body fluids
• D) All specimens submitted for bacterial culture

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Definitions:

Constitutional Isomers

Compounds that have the same molecular formula but differ in the sequence of bonding of their atoms.

Isomeric

Pertains to molecules that have the same molecular formula but different structures.

Sigma Bonds

The strongest type of covalent chemical bond, formed by the direct overlap of atomic orbitals, with the electrons shared in an area centered on a line running between the nuclei.

Pi Bonds

Covalent chemical bonds formed by the side-to-side overlap of atomic orbitals, allowing for electron sharing in double and triple bonds.