miRNA molecules act as specificity factors, which direct effector proteins to target ______ molecules via base-pairing. A. RNA B. Carbohydrate C. Lipid D. DNA E. Protein
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miRNA molecules act as specificity factors, which direct effector proteins to target ______ molecules via base-pairing.
A. RNA
B. Carbohydrate
C. Lipid
D. DNA
E. Protein
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- Changes in a cell that affect micro RNAs lead to cancer because miRNAs... a. help a cell to maintain a tight control on protein levels in a cell. b. decrease the level of a specific protein. c. increase the level of a specific protein. d. prevent the Warburg effect._______ are removed from new mRNAs. a. Introns c. Poly-A tails b. Exons d. Amino acidsCompare and contrast the origins and functions of miRNA and siRNA
- Which is true about eukaryotic cDNA? Choose all that apply a. it is single stranded b. it is made up of only introns c. it is constructed from mRNA that is reverse transcribed d.Which of the following statements below is incorrect? * A. the genetic code is overlapping B. the genetic code is universal C. degenerate codon specify the same amino acids D. the genetic code is triplet Which protein can break covalent bond? * A. Helicase B. Primase C. SSB D. DNA gyrase What is the complementary hnRNA base sequence produced from the DNA base sequence 5' C-T-A-T-A-C 3'? * A. 3' C-A-T-A-T-C 5' B. 3' G-A-T-A-T-G 5' C. 3' G-A-U-A- U-G 5' D. 3' C-U-A-U-A-G 5' Which of the following statements concerning the " cloverleaf" shape of tRNA molecules is correct? * A. four hairpin loops are present B. three hairpin loops and one open end are present C. two hairpin loops and two open ends are present…Which is true about eukaryotic cDNA?Choose all that apply. a. it is constructed from mRNA that is reverse transcribed b. it is made up of only introns c. it is single stranded d. one gene may generate more than one cDNA
- Once translated into proteins: (a) How many nucleotides are there? (b) How many codons are there? (c) How many amino acids?In gene silencing, the “dicer” enzymea. assembles siRNAs into a RISC complex.b. unwinds the RISC complex.c. binds siRNA to mRNA sequences complementary to it.d. slices up double-stranded RNA moleculesAfter tmRNA releases an mRNA and aberrant polypeptide from a stuck ribosome, the resulting polypeptide will A) be translated B) be destroyed by a protease C) be inserted into the cell membrane D) be used to regulate gene expression
- In RNA silencing, siRNAs and miRNAs usually bind to which part of the mRNA molecules that they control? a. 5′ UTR b. Coding region c. 3′ poly(A) tail d. 3′ UTRProcess by which the DNA sequences encoding exons are exchanged and reordered through genetic recombination between DNA sequences encoding introns. Group of answer choices a)RNA editing b)Exon Definition c) Exon Shuffling d)TransesterificationWhich of the following describes the effect of a frameshift mutations? * A. all mRNA codons change B. some, but not all , mRNA codons change C. there is no change in mRNA codons D. no correct response Consider the following DNA base sequence 3' TTA ATA 5'. what dipeptide is formed if a DNA point mutation converts ATA to ATG? * A. Cys-Phe B. Tyr-Tyr C. Phe-Leu D. Ser-Tyr Consider the following mRNA base sequence 5' ACC CAC 3', what dipeptide is formed if a point mutation converts ACC to ACU? * A. Thr-His B. Thr-Thr C. His- Ile D. Ile- Asp Which of the following statements below is incorrect? * A. the genetic code is overlapping B. the genetic code is universal C. degenerate codon specify the same amino acids…