1. Which two amino acids are encoded by…


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20.50

1. Which two amino acids are encoded by only a single codon each? (Points : 1) 2. What molecule carries the codon sequence complementary to the anticodon sequence on the transfer RNA? (Points : 1) 3. What is the term used to describe a mutation that does not alter the amino acid sequence of the protein encoded by a gene? (Points : 1) 4. What is the requirement for a labeled DNA or RNA molecule (i.e., a probe) to hybridize to a section of DNA? (Points : 1) 5. What term is used to describe bacterial enzymes that are used to “cut” the sugar-phosphate backbone of DNA molecules at specific nucleotide sequences? (Points : 1) 6. What type of mutation involves the substitution of a single base in a codon? (Points : 1) 7. In eukaryotes, the initiator tRNA is bonded to methionine. (Points : 1) True False 8. The peptidyl tRNA binding site holds a tRNA molecule bound to the growing peptide chain. (Points : 1) True False 9. Which of the following is the term used to describe the three nucleotides at the base of the cloverleaf of a tRNA? (Points : 1) Codon Promoter P-site Anticodon A-site 10. All tRNA molecules have a CCA sequence at their 3′ ends. (Points : 1) True False 11. Point mutations always result in a change in the amino acid sequence of the protein encoded by the gene. (Points : 1) True False 12. RNA can hybridize both to DNA and to other RNA molecules. (Points : 1) True False 13. Approximately how many human genetic diseases have been described? (Points : 1) 2000 4000 8000 12000 20000 14. Xeroderma pigmentosum is a genetic disease of DNA repair that results in a high incidence of skin cancer. (Points : 1) True False 15. The only important requirement for hybridization of DNA fragments is the presence of complementary nucleic acid sequences. (Points : 1) True False 16. The protein a1-antitrypsin is a protease inhibitor. (Points : 1) True False 17. Which of the following terms is used to describe the process by which a message from DNA in the form of mRNA is converted into the primary sequence of amino acids in a protein? (Points : 1) Translation Transcription Initiation Elongation Translocation 18. An individual with sickle cell anemia carries a mutation in the gene for one of the peptide chains in hemoglobin. Which peptide chain is mutant? (Points : 1) Alpha Beta C-chain Gamma chain Fetal globin 19. A DNA fingerprint requires 25-60 DNA bands that are unique to an individual. (Points : 1) True False 20. Which of the following changes in a DNA molecule may have no effect on the protein for which the DNA codes? (Points : 1) A deletion mutation Formation of a thymine dimer Changing the first base in a triplet Changing the second base in a triplet Changing the third base in a triplet Time Remaining: Note: I am taking this quiz. I want to answers between 2 to 3 hours from now. Please help. Please take your time and provide me with correct answers. Last week I got answer from you and failed my exam with 66%. Please help please. Thank you.,I did deposit $25. I have only less than 2 hours left. Thank you.,Dis you accept my questions or not? Please let me know. I have just 1 hour and 20 minutes left to submit my answers. Thank you. Sam.,Please cancel these answers and put my money ($25.00) back to my account. My time ran off and I did not complete the quiz. I sent email to my professor to let her know that I did not complete the quiz. For now, cancel everything. I do not need the answers anymore for this time. Thank you.

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20.50