10:01 ? nccu.blackboard.com D) 3\' to 5: 3\' to 5 Q. 15. A geneticist isolates a

Question

10:01 ? nccu.blackboard.com D) 3' to 5: 3' to 5 Q. 15. A geneticist isolates a gene for a specific trait under study She also isolates the corresponding mRNA Upon comparison, the mRNA is found to contain 1,000 fewer bases than the DNA sequence. Did the geneticist isolate the wrong DNA? A) yes, mRNA is made from a DNA template and should be the same length as the gene sequence B) yes, the mRNA should contain more bases than the DNA sequence because bases flanking the gene are also C) no, the final mRNA contains only exons, the introns were D) no, the mRNA was partially degraded after it was removed Q. 16. Which of the following statements is true regarding introns? A) Introns are the parts of mRNA that are translated. B) Introns have no function C) In general, human genes have fewer introns than genes of other organisms. D) Introns may be involved in exon shuffiling. Q. 17. Some events that take place during the synthesis of a specific protein are listed below. A. Messenger RNA attaches to a ribosome. B. DNA serves as a template for RNA production C. Transfer RNA bonds to a specific codon D. Amino acids are bonded together E. RNA moves from the nucleus to the cytoplasm. The correct order of these events is i).BEAC D ). DAECB ii). BCEDA div) C BAED Q. 18. What is the role of tRNA during translation? A) bond to open the DNA strand to carry the code for protein synthesis out of the nucleus B) carry ribosomes to the site of protein synthesis C) break aparty mRNA and send it back to the nucleus so that it can be reused D). Carry amino acids to the mRNA for correct placement into the protein chain

Explanation / Answer

15) Did the geneticist isolate the wrong DNA?

C) No, the final mRNA contains only exons, the introns were removed.

16) Which of the following statements is true regarding introns?

D) Introns may be involved in exon shuffling.

17) Some events that take place during the synthesis of a specific protein are listed below:

i) B E A C D

18) What is the role of tRNA during translation?

D) Carry amino acids to the mRNA for correct placement into the protein chain.

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