BIL 150 MALLERY EXAM 4 REVIEW QUESTIONS WITH CORRECT ANSWERS ALL VERIFIED BY AN EXPERT A+ GRADED (LATEST UPDATE)

The two polynucleotide chains in DNA are held together primarily by H bonds between A and U as well as between G and T? a. True b. False - ANS B (DNA does not have Uracil, it has Cytosine) If there is 12% of A in a DNA molecule, then the % of G must be? a. 12% b. 30% c. 368 d. 76% e. none of these are correct - ANS E (A=T and C=G, A+G/T+C=1) The catalytic molecule responsible for making a peptide bond during translation (protein synthesis) in cells is? a. amino synthase b. ribozyme c. release factor d. plasmid e. none of these - ANS B Which of the following biotechnology procedures would one use to specifically edit a known sequence of DNA in a genome? a. polymerase chain reaction b. restriction endonuclease c. CRISPR-Cas9 d. reverse transcriptase e. none of these is correct - ANS C The genetic code? a. is redundant b. is universal c. exhibits 'wobble' d. is a triplet codon e. all of the above - ANS E The number of human protein genes is closest to which of the following numbers? a. 100,000 b. 3,000,000 c. 20,687 d. 40% of all human DNA e. none of these - ANS C Which of the following processes is NOT part of the Central Dogma? a. transcription b. translation c. synapsis d. replication e. all of these - ANS C (Central Dogma: Replication, Transcription, Translation) The enzyme that opens/untwists DNA to allow for it replication by DNA polymerase is? a. topisomerase b. helicase c. primase d. DNA ligase e. binding proteins - ANS B (Topoisomerase = removes supercoils, Primase = RNA polymerase, DNA ligase = seals 3' open holes, Binding proteins = stabilize replication fork) Which of the following enzymes of DNA replication is actually an RNA polymerase? a. topisomerase b. helicase c. primase d. DNA ligase e. DNA polymerase II - ANS C (Primase = RNA polymerase, makes RNA primer terminus) Which of the following product molecules of transcriptions is cut up to produce mRNA? a. ribsomal RNA b. the primary transcript c. transfer RNA d. micro RNA e. none of these - ANS B (Primary transcript = mRNA, introns splice out to make 3 pieces) (Hershey-Chase experiment, labeled genetic molecules in bacteriophages) What molecules were labeled with 32P? a. proteins