Which level of protein structure maintains the helix shape of enzymes?
Correct answer: B. Secondary
- A. Primary
- B. Secondary
- C. Tertiary
- D. Quaternary
- E. Both A and B
Explanation
The most common types of secondary structures are the α helix and the β pleated sheet. Both structures are held in shape by hydrogen bonds, which form between the carbonyl O of one amino acid and the amino H of another.
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The chapter covers water's polarity and biological roles, carbohydrates, lipids, proteins and nucleic acids, including their monomers, bonds, structures and functions. It also distinguishes RNA from DNA and explains conjugated molecules such as glycoproteins, glycolipids and nucleoproteins, which combine organic molecules with a non-protein component.
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