0. A linear stretch of DNA that specifies the sequence of amino A. codon. B. int
ID: 253257 • Letter: 0
Question
0. A linear stretch of DNA that specifies the sequence of amino A. codon. B. intron acids in a polypeptide is called aln)y: D. gene. E. transgene, 31. Why don't all base changes in DNA result in mutations? B. Mutations are never expressed. C. The same amino acid can be produced by more than one codon. D. The cell never makes a mistake during protein translation. E. None of these choices. 32. Which one of the following enzymes is required for the process of transcription of messenger RNA A. RNA polymerase B. DNA polymerase C. Protein polymerase D. Reverse transcriptase E. Catalase 33. Transcription starts at a region ncar the beginning of a gene that is known as an): B. promoter C. activator. D. terminator. E. transcriber 34. By examining the codon table on the right, the codon(s) for the amino acid histidine A. is CAU and CAC. B. are UGG and UCU. C. isUGG. D. is UGU and UGC E. are UAU and UAC 35. One type of nucleic acid can pick up a specific amino acid and pair it with a messenger RNA codon for that amino acid during protein translation. This type of nucleic acid acts as a "molecular hook," and is called: A. ribosomal RNA. B. nucleolar RNA. C. messenger RNA D. transfer RNA. E. nuclear RNA. 36. What is the correct order of the stages for translation of proteins? A. Replication- Elongation - Initiation B. Initiation- Elongation-Termination C. Termination-Elongation Initiation D. Elongation- Initiation- Termination E. Initiation - Replication- Termination 37. What two structures must physically interact in order to translate a messenger RNA into a polypeptide chain? A. transfer RNA and messenger RNA B. Ribosomes and DNA C. Ribosomes and transfer RNA D. DNA and amino acids E. Amino acids and ribosomesExplanation / Answer
34. Ans-A. are CAU and CAC
Explanation:
By examining the codon table, it is found that CAU and CAC codes for histidine.
35. Ans- D. tRNA
Translation takes place in ribosomes that catalyze the reaction and links amino acids to form a new protein.
tRNAs (transfer RNAs) act as a bridge that carries amino acids to the ribosome and pair with a mRNA.
36. Ans- B. initiation-elongation-termination
Explanation:
Translation takes place in three stages such as Initiation, Elongation, and Termination
37. Ans-C. ribosomes and tRNA
Explanation:
tRNA and ribosome together interact with translated messenger RNA (mRNA) into a polypeptide chain.
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