Protein Structure problems
- 1. 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 Discuss
Correct Answer: collagen synthesis
- 2. 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
Correct Answer: binding to the protein RAD 51 which repairs DNA damage
- 3. 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
Correct Answer: phenylalanine in the diet is restricted
- 4. 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
Correct Answer: regulate passage from one stage of cell division to another
- 5. 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
Correct Answer: is a tumor supressor
- 6. 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
Correct Answer: quaternary structure
- 7. Beta pleated sheets are examples of protein's
Options- A. primary structure
- B. secondary structure
- C. tertiary structure
- D. quaternary structure Discuss
Correct Answer: secondary structure
- 8. Metastasis involves
Options- A. ability of cells to dissolve cellular matrix
- B. metalloprotein levels
- C. decreased levels of proteins that regulate metalloproteins
- D. all of the above Discuss
Correct Answer: all of the above
- 9. Sickle cell disease is due to
Options- A. a mutation in the beta chain of Hb
- B. a mutation in the alpha chain of Hb
- C. infection with a parasite
- D. none of the above Discuss
Correct Answer: a mutation in the beta chain of Hb
- 10. Signal sequences are part of a protein that
Options- A. signal folding of the protein
- B. signal the protein synthesis on the ribosomes is ended
- C. transport proteins to other sites within the cell
- D. refold proteins in prion-associated diseases Discuss
Correct Answer: transport proteins to other sites within the cell
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