logo

CuriousTab

CuriousTab

Discussion


Home Biochemistry Protein Structure Comments

  • Question
  • Marfan's syndrome is thought to be a mutation affecting


  • Options
  • A. hemoglobin synthesis
  • B. collagen synthesis
  • C. metabolism of homogentisic acid
  • D. insufficient thyroid production

  • Correct Answer
  • collagen synthesis 


  • Protein Structure problems


    Search Results


    • 1. The major function of RNA polymerase's sigma factor is

    • Options
    • A. recognition of the translational stop sequence
    • B. recognition of the transcriptional start sequence
    • C. recognition of the transcriptional stop sequence
    • D. recognition of the translational start sequence
    • Discuss
    • 2. Transcription begins

    • Options
    • A. at the start codon
    • B. upstream from the start codon
    • C. downstream from the start codon
    • D. none of these
    • Discuss
    • 3. RNA is synthesized on a DNA template in a process called __________ , which utilizes the enzyme __________

    • Options
    • A. translation, RNA polymerase
    • B. transcription, DNA polymerase
    • C. transcription, RNA polymerase
    • D. replication, DNA polymerase
    • Discuss
    • 4. Transcription of each set of rRNA genes by RNA polymerasel produces

    • Options
    • A. a single 45S rRNA precursor molecule
    • B. a single 5S rRNA precursor molecule
    • C. a single 18S rRNA precursor molecule
    • D. a single 28S rRNA precursor molecule
    • Discuss
    • 5. Multiple copies of 5S genes, located at a chromosomal site distinct from the other rRNA genes

    • Options
    • A. are transcribed by rRNA polymerase III and the 5S rRNA
    • B. are transcribed by rRNA polymerase II
    • C. are transcribed by rRNA polymerase I and the 5S rRNA
    • D. are transcribed by DNA polymerase I
    • Discuss
    • 6. BRACl, an inherited form of breast cancer, regulates cell division by

    • Options
    • A. binding to a DNA sequence
    • B. complexing with cyclins
    • C. binding to the cell outer membrane
    • D. binding to the protein RAD 51 which repairs DNA damage
    • Discuss
    • 7. Individuals with PKU disease are mentally retarded unless

    • Options
    • A. phenylalanine in the diet is restricted
    • B. tyrosine in the diet is restricted
    • C. homogentisic acid in the diet is restricted
    • D. none of the above
    • Discuss
    • 8. Cyclins are proteins that

    • Options
    • A. regulate ability of cells to invade tissue
    • B. regulate passage from one stage of cell division to another
    • C. regulate apoptosis of damaged cells
    • D. none of the above
    • Discuss
    • 9. Over 50% of common cancers are associated with damage to a protein, p53. This protein

    • Options
    • A. is a cyclin
    • B. is a tumor supressor
    • C. is an oncogene
    • D. regulates apoptosis
    • Discuss
    • 10. The four subunits of the hemoglobin (Hb) gene represent protein's

    • Options
    • A. primary structure
    • B. secondary structure
    • C. tertiary structure
    • D. quaternary structure
    • Discuss


    Comments

    There are no comments.

Enter a new Comment