Consider the Following Description of an Area of Current Research

question 23

Multiple Choice

Consider the following description of an area of current research. "Beta-polypeptides are polymers of beta amino acids with backbones one carbon longer than alpha-polypetptides. Like the alpha-polypeptides found in nature, beta-polypeptides can form stable helices and pleated sheets." Which levels of protein structure are cited in this statement?

• A) primary
• B) secondary
• C) tertiary
• D) quaternary
• E) primary and secondary
• F) primary, secondary, and tertiary
• G) primary, secondary, tertiary, and quaternary