41. An amino acid is bound to its matching tRNA (the tRNA with the correct antic

Question

41. An amino acid is bound to its matching tRNA (the tRNA with the correct anticodon) by the enzyme a. amino acyl- tRNA synthetase b. amino acyl - tRNA integrase c. tRNA -amino acid synthetase d. amino acid -tRNA synthetase Questions 42 and 44 refer to the sequence of mature mRNA molecule listed below with underlined initiation and termination codon. 42. The protein that is encoded by this mRNA will contain mRNA 5"- AGC UGC AUG GCA UGC GCC ACA UGA CGA AGA AUC -3 amino acids. a. b. 7 d.5 43. After isolating the rough endoplasmic reticulum from the rest of the cytoplasm, you purify the RNAs attached to it. Which of the following proteins do you expect the isolated RNA to code? a. soluble secreted proteins b. ER membrane proteins c. plasma membrane proteins d. all of the above 44. The mRNA depicted above (in question 42) could be found in a. Prokaryotes only b. Eukaryotes only c. Prokaryotes, mitochondria and chloroplast d. mitochondria and chloroplast only 45. The tRNA for methionine is also called initiator tRNA since it basepairs with the initiation codon (5'AUG3'). The sequence of the anticodon found in the initiator tRNA is a. 3 UAC5 b.5'UAC3 c. 3'TAC5 d. none of the above Analyze the diagram of the ribosome below and answer questions 46-50. 46. The diagram presents a ribosome that could be observed during: a. Translation elongation b. Translation initiation c. Translation termination d. Protein modification 47. Where is the 5' end of the mRNA molecule being translated? a. In the P-site of the ribosome BIOL200 EXAM III-IF-AT

Explanation / Answer

1-a

2-d

3-c

4-a

5-a

Note- aminoacyl trna synthetase help in bind of amino acid to trna

The no of codon triplet of bases determinevthe number of amino acid to be coded.

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