Which statements explain the primary difference between the structure of a nucleic acid and the structure of a protein? O A nucleic acid has alternating base pairs. A protein has alternating peptides O Nitrogen bases form the backbone of a nucleic acid. Peptides form the backbone of a protein O Nucleotides link together to form a nucleic acid. Amino acids link together to form a protein O A nucleic acid is held together by the sugar-phosphate complex. A protein is held together by the carbon-carbon bonds

The quaternary structure of a protein results from (choose the best answer) O a mutation O a prion such as the one that causes the scrapie disease in sheep O a combination of multiple lipid subunits a combination of polysaccharide subunits O a combination of two or more protein subunits

Draw the structure of a polypeptide backbone

Which types of molecules can serve as informational macromolecules in cells? O nucleic acids O proteins both proteins and nucleic acids O proteins, nucleic acids, and oligosaccharides O oligosaccharides

Select three components that would make up a nucleotide and would the nucleotide be part of DNA or RNA? Would it contain purine or a pyrimidine?

> Is the R group (CH3) on the amino acid alanine seen below, polar or non-polar? > If there were several alanines close together in a peptide chain would that bit of the chain be exposed to or folded to "hide" from water? H H N-C H-C-H 0-H

Which statement is NOT true about the figure below? O Major and minor grooves are shown here. Diameter is 2nm O Tertiary structure of a protein molecule is shown here. O The purple interior represents nitrogenous base pairs