Practice Quiz

Praxis II: Biology Content Knowledge Exam Prep

Category - Biology

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Which of the following is NOT considered a building block for a larger, more complex structure?
  1. Glucose, a monosaccharide
  2. Guanine, a nitrogenous base
  3. Alanine, an amino acid
  4. Lipase, an enzyme
  5. Lactose, a disaccharide
Explanation
Answer: D, Lipase. Lipase is an enzyme, and enzymes do not form larger structures.

Key Takeaway: A key characteristic of life is that smaller subunits combine to form larger, more complex structures. Amino acids combine to form proteins, nitrogenous bases combine with sugars to form nucleosides, and simple sugars combine to form complex sugars. An enzyme is already arranged as a complex structure, and will not combine to form a larger structure.
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