18. Which molecule carries a copy of the genetic information out of the nucleus? C. TRNA D. codon 20. What do you call the sequence of three bases in tRNA that corresponds to an amino acids? C. code D. codon D. IRNA 19. What do you call the sequence of three bases in mRNA that corresponds to an amino acid? A. amino acid mRNA B. mRNA A. amino acid B. anticodon AND. amino acid C. code 21. Where does transcription take place? B. anticodon C. code D. codon. 21. Where does transcription take place A. Golgi bodies B. mitochondria C. nucleus D. ribosome 22. Which of the following is directly involved in t translation phase of protein synthesis? A. cytoplasm C. nucleus B, mitochor D. ribosome 23. Which of the following is carried by the transfer RNA (IRNA)? A. amino acid C. nucleic acid B. DNA D. ribosome 24. Which of the following is NOT a part of protein synthesis? A. elongation C. transcription B. replication D. translation 25. In the RNA molecule, which nitrogen base is found in place of thymine? A. cytosine B. guanine C thymine D. uracil 26. During the process of transcription, which of the following is produced? A. ATP C. H₂O B. DNA D. MRNA 27. If the DNA template reads "ATA", which of the following would be the corresponding mRNA codon? A. ATA B. TUT D. UCU C. UAU 28. The genetic code is based upon the reading of how many bases at a time? A. one C. three B. two D. four 29. Amino acids are held together by bonds. A. hydrogen C. high energy B. ionic D. peptide 30. How many codons are needed to specify three amino acids? A.3 C.9 B. 6 D. 12 31. Which of the following is a similarity between DNA and messenger RNA molecules? They both contain ^ uracil B. double-stranded polymers C. phosphates D. the same sugar 32. Events that take place during the synthesis of a specific protein are listed below. Lambda Messenger RNA attaches to a ribosome. B. DNA serves as a template for the production of RNA. C. Transfer RN * Lambda bonds to a specific codon. D. Amino acids are bonded together. E. RNA exits from the nucleus to the cytoplasm.
ANSWER
18. B 19. B 20. A 21. D 22. B 23. C 24. A 25. B 26. A 27. C 28. D 29. D 30. C 31. B 32. A
