Use the Following Paragraph to Answer the Corresponding Question(s)

question 31

Multiple Choice

Use the following paragraph to answer the corresponding question(s) .
Masatomo Kawakubo et al. reported in Science in August 2004 that the human stomach contains a natural, carbohydrate-based antibiotic that probably protects a large portion of the population from various diseases caused by the bacterium Helicobacter pylori. This bacterium has been linked to peptic ulcers, gastritis, and stomach cancer. This naturally occurring antibiotic is described by Kawakubo as having a terminal α 1,4-linked N-acetylglucosamine (NAG) , and it acts by inhibiting the biosynthesis of a major component of the cell wall in H. pylori. [SOURCE: M. Kawakubo et al., Science 305 (2004) : 1003.]
-Which of the following structures is most consistent with Kawakubo's description of this antibiotic?

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Definitions:

Engine Speed

The measure of the number of revolutions per minute (RPM) at which an engine's crankshaft is rotating.

Generator Tests

Diagnostic procedures used to assess the functioning and efficiency of a vehicle's generator or alternator, ensuring it provides sufficient electrical power.

Battery Load Test

A test that measures the battery’s ability to produce current by loading it at one-half of its CCA rating for 15 seconds, during which time the battery voltage should not drop below 9.6 volts. Special equipment isrequired. Also called a high-capacity discharge test.

Produce Current

The process of generating an electrical current through various means such as mechanical movement in generators or chemical reactions in batteries.