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Ribosome: Quiz

  
  
  
  

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Question 1: Ribosomes were first observed in the mid-1950s by Romanian cell biologist ________ using an electron microscope as dense particles or granules[4] for which he would win the Nobel Prize.
Earl Wilbur Sutherland, Jr.Salvador LuriaGeorge Emil PaladeMarshall Warren Nirenberg

Question 2: Since the cytosol contains high concentrations of glutathione and is therefore a reducing environment, proteins containing ________, which are formed from oxidized cysteine residues, cannot be produced in this compartment.
Disulfide bondMethylationPeptide bondAmino acid

Question 3: The mRNA comprises a series of codons that dictate to the ribosome the sequence of the ________ needed to make the protein.
MetabolismAmino acid synthesisAmino acidL-DOPA

Question 4: The ribosomes in the ________ of eukaryotic cells resemble those in bacteria, reflecting the evolutionary origin of this organelle.
MitochondrionMitochondrial DNASuccinate dehydrogenasePyruvate dehydrogenase complex

Question 5: Ribosomes have been classified as ribozymes, since the ________ seems to be most important for the peptidyl transferase activity that links together amino acids.
Transfer RNANon-coding RNADNARibosomal RNA

Question 6: As ribozymes are partly constituted from RNA, it is thought that they might be remnants of the ________.
ProteinAbiogenesisRNA world hypothesisDNA

Question 7: These differences in structure allow some ________ to kill bacteria by inhibiting their ribosomes, while leaving human ribosomes unaffected.
ATC code J01Nucleic acid inhibitorAntibiotic misuseAntibiotic

Question 8: Their large subunit is composed of a 5S ________ subunit (consisting of 120 nucleotides), a 23S RNA subunit (2900 nucleotides) and 34 proteins.
RNASmall interfering RNADNANon-coding RNA

Question 9: Two papers were published in November 2005 with structures of the ________ 70S ribosome.
Escherichia coliHelicobacter pyloriPathogenic bacteriaPseudomonas aeruginosa

Question 10: Ribosomes translate messenger RNA (mRNA) and build ________ chains (e.g., proteins) using amino acids delivered by transfer RNA (tRNA).
BremelanotideAfamelanotidePeptideMelanotan II
















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