Teichoic Acids Are

question 20

Multiple Choice

Teichoic acids are

• A)waxy substances that are found in some bacterial cell walls that make their cells resistant to toxic substances, including acids.
• B)glycerol or ribitol phosphate polymers that are combined with various sugars, amino acids, and amino sugars, which are a part of the cell wall of gram-positive bacteria.
• C)high-molecular-weight polysaccharides that coat some bacterial cells and protect the bacteria from attack by cells of the human defense system.
• D)hairlike, proteinaceous structures that extend from the cell.

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Definitions:

Snellen Chart

A chart used to measure visual acuity, consisting of rows of letters decreasing in size that the patient reads from a specified distance.

Jaeger System

A method used to assess near vision acuity, using a chart of varied sizes of print to determine the smallest text a person can read.

Occluder

A device or object that obstructs or blocks the flow of fluid or light, often used in medical procedures to correct defects or abnormal pathways.

Ishihara Method

A color vision test for detecting red-green color deficiencies using colored dots to form numbers or shapes.