Question

question 16 0.5 pts the α -helix and the β -pleated sheet are part of which protein structure? primary complementary tertiary secondary quaternary question 17 0.5 pts mad cow disease is an infectious disease where one misfolded protein causes all other copies of the same type of protein to begin misfolding. the __ structure is not affected in this process. not enough information is given. no answer text provided. double helix tertiary primary secondary question 18 0.5 pts a nucleotide of dna may contain _____. ribose, uracil, and a phosphate group none of these answer choices are correct. ribose, thymine, and a galactose group deoxyribose, thymine, and a phosphate group deoxyribose, uracil, and a phosphate group

Explanation:

• For Question 16: The α - helix and β - pleated sheet are characteristic secondary - structure elements of proteins formed by hydrogen bonding between backbone atoms.
• For Question 17: In mad cow disease (caused by prions), the primary structure (the amino - acid sequence) of the protein is not affected. Misfolding occurs in secondary, tertiary, and quaternary structures.
• For Question 18: A DNA nucleotide consists of deoxyribose (a 5 - carbon sugar), a nitrogenous base (thymine in DNA), and a phosphate group.

Answer:

Question 16: D. secondary
Question 17: E. primary
Question 18: D. deoxyribose, thymine, and a phosphate group