BIO 181 Exam 2 Questions with Correct Answers 2026

BIO 181 Exam 2 Questions with Correct Answers 2026 In eukaryotic cells the start codon for protein synthesis is ______. - Correct Answer AUG True/False The DNA polymerase that replicates the parental strand of DNA reads the parental DNA from 5' to 3" and makes a new DNA strand from 3' to 5'. - Correct Answer false Which sugar is present in RNA? - Correct Answer ribose True/False During DNA replication (mutation) is greatly reduced by enzymes that proof read the newly replicated DNA. - Correct Answer true How many "stop" codons exist? - Correct Answer 3 In the ribosome, what pairs with the codon? - Correct Answer anticodon List the two basic categories of nitrogenous bases in nucleic acids. - Correct Answer purines and pyrimidines Which enzyme unwraps the double helix? a. Helicase b. DNA polymerase III c. DNA polymerase I d. Nucleosome e. DNA ligase - Correct Answer a. helicase In DNA, what does the nucleotide labeled as A pair with? - Correct Answer Thymine