Which of the following molecules is NOT considered a porphyrin?

A. Chlorophyll
B. Vitamin B12
C. Hemoglobin
D. Peptidoglycan


Answer: D

Biology & Microbiology

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Which of the following is an example of a special sense?

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The alimentary canal is ________.

A. the accessory organs B. the esophagus C. the small and large intestines D. the series of digestive organs

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What is the function of cerebrospinal fluid?

What will be an ideal response?

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What is a riboswitch?

What will be an ideal response?

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