Multiple Choice Questions

In the diagram below, the two blue strands represent _____.
  • 5' —> 3'.Nucleotides are added to the 3' end of RNA.
  • DNA
  • the promoter.The promoter is the region of DNA at which the process of transcription begins.
  • RNA polymerase.RNA polymerase untwists a portion of the DNA double helix.
Translation occurs in the _____.
  • small RNAs and proteins.Spliceosomes are complexes composed of small RNAs and proteins.
  • cytoplasm. Ribosomes, the sites of translation, are found in the cytoplasm.
  • a long string of adenine nucleotides.A poly-A tail is added to the 3' end of the RNA.
  • 5' —> 3'.Nucleotides are added to the 3' end of RNA.
Where does translation take place?
  • The ribosome slides one codon down the mRNA.Translocation is the process by which the ribosome slides down the mRNA so a new cycle of elongation can begin.
  • GTTACGCAAUGC
  • small RNAs and proteins.Spliceosomes are complexes composed of small RNAs and proteins.
  • Ribosome
In the diagram below, the green unit represents _____.
  • a long string of adenine nucleotides.A poly-A tail is added to the 3' end of the RNA.
  • the promoter.The promoter is the region of DNA at which the process of transcription begins.
  • RNA polymerase.RNA polymerase untwists a portion of the DNA double helix.
  • DNA
Which of the following steps occurs last in the initiation phase of translation?
  • A-site.This is the site at which new aminoacyl tRNAs that are complementary to the mRNA codon enter the ribosome.
  • GTTACGCAAUGC
  • Phosphorylation.Enzymes can phosphorylate proteins to alter their activity.
  • The large ribosomal subunit joins the complex.This step occurs after the 5' mRNA is bound by the ribosome and the start codon is bound by an aminoacyl tRNA.
Which of the following processes is an example of a post-translational modification?
  • The large ribosomal subunit joins the complex.This step occurs after the 5' mRNA is bound by the ribosome and the start codon is bound by an aminoacyl tRNA.
  • GTTACGCAAUGC
  • A-site.This is the site at which new aminoacyl tRNAs that are complementary to the mRNA codon enter the ribosome.
  • Phosphorylation.Enzymes can phosphorylate proteins to alter their activity.
Indicate at which step of the replication-transcription-translation process each type of RNA first plays a role.
  • Phosphorylation.Enzymes can phosphorylate proteins to alter their activity.
  • The large ribosomal subunit joins the complex.This step occurs after the 5' mRNA is bound by the ribosome and the start codon is bound by an aminoacyl tRNA.
  • tRNA: contains an anticodon, has amino acids covalently attached to it mRNA: contains exons, specifies the amino acid sequence for a proteinrRNA: is a component of ribosomes, is the most abundant form of RNA
  • Transcription/RNA processing: mRNATranslation: tRNA, rRNADuring replication, a faithful copy of a DNA molecule is made.During transcription, the DNA "message" is copied onto a molecule of mRNA.During translation, the information carried in the mRNA is transferred to molecules of tRNA to build a protein on the ribosomes.
Which nucleic acid is translated to make a protein?
  • tRNA: contains an anticodon, has amino acids covalently attached to it mRNA: contains exons, specifies the amino acid sequence for a proteinrRNA: is a component of ribosomes, is the most abundant form of RNA
  • Phosphorylation.Enzymes can phosphorylate proteins to alter their activity.
  • 5' —> 3'.Nucleotides are added to the 3' end of RNA.
  • mRNAmRNA is the message that is translated to make a protein
The RNA segments joined to one another by spliceosomes are _____.
  • a long string of adenine nucleotides.A poly-A tail is added to the 3' end of the RNA.
  • exons.Exons are expressed regions.
  • A-site.This is the site at which new aminoacyl tRNAs that are complementary to the mRNA codon enter the ribosome.
  • 5' —> 3'.Nucleotides are added to the 3' end of RNA.
Sort each description by the type of RNA it describes.
  • tRNA: contains an anticodon, has amino acids covalently attached to it mRNA: contains exons, specifies the amino acid sequence for a proteinrRNA: is a component of ribosomes, is the most abundant form of RNA
  • a long string of adenine nucleotides.A poly-A tail is added to the 3' end of the RNA.
  • The ribosome slides one codon down the mRNA.Translocation is the process by which the ribosome slides down the mRNA so a new cycle of elongation can begin.
  • mRNAmRNA is the message that is translated to make a protein
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Multiple Choice Questions
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