0 PRACTICE Exam1 Wirder 201 2. The serm ani-parale refere to which of the fowng? e each ew doubie helix is half old materist and hatf new π 20% of the-giotides in an creanam’s DNA are Aderir”, what percortage s cytnum? 3. dno% 4. The uncion of transfer RNA (IRNA) is to unwind DNA for ancess to amino acds earry яmno acats to the rbesme. d. bond with antcodons in mRNA 5. Which is the best estimation of the sequanos of bases in DNA that wo ead to the order of TRNA e. Ary of these an codors 1AC and UGG being sed in tramalation? a AUG ACC 6. Which is true of mutatons? ATG ACC a A change in DNA base sequence always resuts in a cheange in amino acid sequence in a proen b. Changis in mRNA codons wil aways result in a diterent amino acid being added to a probein c. A mutation in the iIntron of a gene will result in a frame-shé mutsion. d. Mutations in exons will result in formation of Okscaki fragments e. A change in amino acid sequence in a praiein may not change the shape and functon ot the protein 7, RFLP’s in humans is based on a. the wooble effect in MRNA tRNA paring b. individual plasmid diferences c different numbers of repeated sequencss whin restricion fragments d. indlividual differences in human restriction enzymes e. amino şcid sequerce differences botween i ndividuals’ proteins Use the folowing to answer questions g through 12 a DNA polymeraseb. Reverse Transcriptase ase b. Reverse Transcriptase RNA polymerase lI d. Repressor Helicase 8 Enzyme requred for DNA replication in cells, but not in PCR 9. Regulalor pratein that binds to DNA to prevent transcription. ne that is active primarily in the S phase of the cell cycle, and also used in PCR rO. Enzym 11. Enzyme that uses mFRNA to construct complementary DNA. 12. Enzyme used in transoription of transfer RNA genes. 13. Alternative splicing of exons violates which of the following long-accepted hypotheses? a the hypothesis of semiconservative replication.b. the principle of transfomation c. the one gene -> one polypeplide hypothesis e. the double helix model of DNA structure. d. Chargalfs rule 14. “Leucine zippers’ and “Zinc fingers’ are two examples of which of the Solcaing? a. The shapes of enhancer regions of mRNA b. Methods to transform bacterial cells c. Origins of replication in prokaryotes e. DNA binding motifs in transcription factors d. Master switch genes in fruit fly development.