17. When human mitochondrial DNA is transcribed A. It is transcribed in short pi

Question

17. When human mitochondrial DNA is transcribed A. It is transcribed in short pieces that are stitched together by ligament to form the required mRNAs, tRNAs, and rRNAs B. Both strands of DNA are transcribed and then broken down into the required mRNAs, tRNAs, and rRNAs C. Both strands of DNA are transcribed and then broken down into the required mRNAs and rRNA, while the tRNAs are brought from the cytoplasm D. Only one strand of DNA is transcribed and it is transcribed as operon a just as in bacteria E. Only one strand of DNA is transcribed and then broken down into the required mRNA by splicing out the tRNAs and rRNAs
18. The fact that the gene for leucine tRNA in plastids has an intron located within the UAA anticodon sequence A. Is evidence that plastids arose from green algae B. Is evidence that plastic DNA has its origin in the nuclear DNA, since both have the same intron in the same place C. Is evidence that plastids arose from cyanobacteria, since both have the same intron in the same place D. Helps to explain why leucine is not used in the proteins coded for by planted DNA E. Is evidence that plant plastids arose independently from algal plastids and from Cyanobacteria, since neither of these have introns in that position 17. When human mitochondrial DNA is transcribed A. It is transcribed in short pieces that are stitched together by ligament to form the required mRNAs, tRNAs, and rRNAs B. Both strands of DNA are transcribed and then broken down into the required mRNAs, tRNAs, and rRNAs C. Both strands of DNA are transcribed and then broken down into the required mRNAs and rRNA, while the tRNAs are brought from the cytoplasm D. Only one strand of DNA is transcribed and it is transcribed as operon a just as in bacteria E. Only one strand of DNA is transcribed and then broken down into the required mRNA by splicing out the tRNAs and rRNAs
18. The fact that the gene for leucine tRNA in plastids has an intron located within the UAA anticodon sequence A. Is evidence that plastids arose from green algae B. Is evidence that plastic DNA has its origin in the nuclear DNA, since both have the same intron in the same place C. Is evidence that plastids arose from cyanobacteria, since both have the same intron in the same place D. Helps to explain why leucine is not used in the proteins coded for by planted DNA E. Is evidence that plant plastids arose independently from algal plastids and from Cyanobacteria, since neither of these have introns in that position A. It is transcribed in short pieces that are stitched together by ligament to form the required mRNAs, tRNAs, and rRNAs B. Both strands of DNA are transcribed and then broken down into the required mRNAs, tRNAs, and rRNAs C. Both strands of DNA are transcribed and then broken down into the required mRNAs and rRNA, while the tRNAs are brought from the cytoplasm D. Only one strand of DNA is transcribed and it is transcribed as operon a just as in bacteria E. Only one strand of DNA is transcribed and then broken down into the required mRNA by splicing out the tRNAs and rRNAs
18. The fact that the gene for leucine tRNA in plastids has an intron located within the UAA anticodon sequence A. Is evidence that plastids arose from green algae B. Is evidence that plastic DNA has its origin in the nuclear DNA, since both have the same intron in the same place C. Is evidence that plastids arose from cyanobacteria, since both have the same intron in the same place D. Helps to explain why leucine is not used in the proteins coded for by planted DNA E. Is evidence that plant plastids arose independently from algal plastids and from Cyanobacteria, since neither of these have introns in that position

Explanation / Answer

17)

During Human mitochondrial DNA is transcription both strands of DNA are transcribed and then broken down into the required mRNAs, tRNAs, and rRNAs.
Thus, the correct option is (A).

18)

The fact that the gene for leucine tRNA in plastids has an intron located within the UAA anticodon sequence is evidence that plant plastids arose independently from algal plastids and from Cyanobacteria, since neither of these have introns in that position.

Thus, the correct option is (E).

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