QUESTION 1 How are genes used by cells to build proteins? O The genes in RNA direct the synthesis of a DNA molecule, which is used to build a protein. The genes in DNA direct the synthesis of an RNA molecule, which is used to build a protein. DNA is transcribed into an amino acid sequence. O The genes in RNA direct the synthesis of proteins directly. QUESTION 2 What components make up a nucleotide? O a sugar and a phosphate group only a sugar, a nitrogenous base, and a phosphate group O a nitrogenous base and a sugar only O a nitrogenous base and a phosphate group only QUESTION 3 What is the correct flow of information in gene expression? ODNA RNA-protein ORNA DNA-protein O DNA-protein-RNA O Protein-RNA-DNA QUESTION 4 Which of the following is an amino group? -OH O-CO O-COOH