Processing of pre-IRINAs to produce tRNAs involves a cleavage of the pre-IRNA DA

Question

Processing of pre-IRINAs to produce tRNAs involves a cleavage of the pre-IRNA DA a dition to the 5' end activity to cleave the base and deoxyribose. d. the removal of one intron. 21. Processing of RNA transcripts occurs a only in eukaryotic cells b. only with mRNA transcripts. c. only with rRNA and mRNA transcripts. d. with tRNA, rRNA, and mRNA transcripts. 22. Eukaryote the cytoplasmNA processing occurs in a. the cytoplasm. bthe ncieus after completion of transcription. c a complex with RNA polymerase d. the Golgi apparatus. 23. The 7-methyl guanosine cap on mRNA is required for a. protecting an mRNA from exonuclease attack b. protecting an mRNA from endonuclease attack. c. initiation of translation of the mRNA d. the addition of the poly-A tail. 24. Spliced mRNAs have protective mechanisms, but introns are rapidly degraded in the a. nucleus b. cytoplasm. c. lysosomes. d. nucleoli 25. Nucleosomes are an impediment to transcription in eukaryotic cells. a. True b. False 26. In eukaryotic cells, genes with methylated DNA tend to be more active than unmethylated genes a. True b. False 27. The transmission of information tat is not contained within the sequence of DNA to daughter cols division is called epigenetic inheritance. a. True b. False 28. Messenger RNAs have varying half-lives in the cytoplasm, and those differences are usually due t differences in the sequences near the 3 end of the mRNA a. True b. False 29. The capacity for some tRNAs to recognize more than one codon in mRNA is explained by a pher a. redundancy b wobble. c. a reading frameshift.

Explanation / Answer

20. The correct option is a.

21. The correct option is d.

22. The correct option is b.

23. The correct option is a.

24. The correct option is a.

25. The correct option is a.

26. The correct option is b.

27. The correct option is a.

28. The correct option is a.

29. The correct option is b.

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