NAME

Question types


Start with


Question limit

of 69 available terms

Advertisement Upgrade to remove ads
Print test

5 Written questions

5 Matching questions

  1. DNA replication
  2. rRNA
  3. Meselson & Stahl Experiment (1959)
  4. nucleosome
  5. nucleolar organizer regions (NOR)
  1. a -lowest level of chromosome organization
    -form fundamental repeating units of eukaryotic chromatin
    -146bp of DNA wrapped almost twice around histone octomer
    -10 nm fibers
  2. b tested the three models of DNA replication by this: bacteria grown in N15; transferred to medium containing 14N. different N-isotope distinguishable
    -prove semi-conservative replication
  3. c central component of ribosome's protein manufacturing machinery
  4. d -semi conservative(parent chain separate and daughter chain base pair with parent chains forming 2 new double helices)
    -antiparallel(5'->3' on both but in opposite directions to each other)
  5. e region of chromosomes where rRNA genes are amplified (>100 copies)

5 Multiple choice questions

  1. 5' cap, coding regions (CDS), untranslated regions (UTRs), 3' poly (A) tail
  2. UAA, UAG, UGA
  3. -codons decoded and translated to protein
    -begin with start codon, end at stop codon
  4. ribosomes transcribing same piece of mRNA creating many copies of same protein
    -5' end codes for N-terminal amino acid
    -3' end codes for C-terminal amino acid
  5. composed of many splicing factors
    -mediate splicing process

5 True/False questions

  1. mitotic chromosomesribosomes transcribing same piece of mRNA creating many copies of same protein
    -5' end codes for N-terminal amino acid
    -3' end codes for C-terminal amino acid

          

  2. pre-Initiation of Protein Syntheisis1: bring ribosomal subunit to initiation codon(codon AUG near 5' end of mRNA)
    2: bring 1st aa tRNA into ribosome (methionine-tRNA enters P site ;binds to AUG codon and IF2 )
    -IF3 and IF1 released
    3: assemble complete initiation complex(large subunit joins complex; IF2 hydrolyzed through GTP hydrolysis, releasing IF2-GDP)

          

  3. elongation phase of protein synthesis1: aminoacyl-tRNA selection
    -2nd aminoacyl-tRNA enters A site
    -1st combining with protein elongation factor bound to GTP (EF-Tu-GTP)
    -GTP hydrolyzed and Tu-GDP complex released, leaving aa-tRNA bound in A site
    2: peptide bond formation between the 2 tRNAs (enzyme peptidyl transferase catalyst)
    -forms dipeptidym-tRNA
    3: translocation: ribosome moves 1 codon along mRNA (in 5'-3' direction)
    -deacylated tRNA moves from P site to E site
    -GTP hydrolyzed and EF-G-GDP leaves ribosome
    4:release deacylated tRNA: new aminoacyl-tRNA enters A site

          

  4. Shine Dalgarno sequenceribosome identifies start codon using this in prokaryotes

          

  5. "beads on a string"many nucleosomes on DNA strand

          

Create Study Set