What does the primary structure of a protein refer to?
A.) the locations of the protein's alpha helices and beta sheets
B.) the structure that forms first as the protein folds into its most stable form
C.) the locations of the peptide bonds that form the protein's backbone
D.) the linear amino acid sequence of the protein
E.)the overall 3D shape of the protein
Ans: D.) the linear amino acid sequence of the protein
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Which of the following does not describe an aspect of the three-dimensional structure of the DNA helix?
A. The deoxyribose has the C-2' endo conformation, which defines the distance between adjacent phosphate groups. B. The hydrophilic backbone of the alternating sugar and phosphate groups is on the outside of the helix. C. The nearly planar and hydrophobic bases are stacked inside the helix relatively perpendicular to the backbone. D. Additional stability is conferred by the hydrogen bonding between the complementary bases. E. All of these choices correctly describe the structure of the DNA helix.
A particular gene that controls seed coat color in peas also determines the susceptibility of these peas to a particular
disease. This situation is referred to as: a. variegation. b. polygenic inheritance. c. codominance. d. pleiotropy. e. incomplete dominance.
Which of the following never have cell walls?
A. algae B. animal cells C. archaea D. bacteria E. fungi
How does phosphorylation control protein activity?
What will be an ideal response?