MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Biochemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The four subunits of the hemoglobin (Hb) gene represent protein's |
| A. | primary structure |
| B. | secondary structure |
| C. | tertiary structure |
| D. | quaternary structure |
| Answer» E. | |
| 2. |
Marfan's syndrome is thought to be a mutation affecting |
| A. | hemoglobin synthesis |
| B. | collagen synthesis |
| C. | metabolism of homogentisic acid |
| D. | insufficient thyroid production |
| Answer» C. metabolism of homogentisic acid | |
| 3. |
Cyclins are proteins that |
| 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 |
| Answer» C. regulate apoptosis of damaged cells | |
| 4. |
Over 50% of common cancers are associated with damage to a protein, p53. This protein |
| A. | is a cyclin |
| B. | is a tumor supressor |
| C. | is an oncogene |
| D. | regulates apoptosis |
| Answer» C. is an oncogene | |
| 5. |
Sickle cell disease is due to |
| 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 |
| Answer» B. a mutation in the alpha chain of Hb | |
| 6. |
Beta pleated sheets are examples of protein's |
| A. | primary structure |
| B. | secondary structure |
| C. | tertiary structure |
| D. | quaternary structure |
| Answer» C. tertiary structure | |
| 7. |
Metastasis involves |
| A. | ability of cells to dissolve cellular matrix |
| B. | metalloprotein levels |
| C. | decreased levels of proteins that regulate metalloproteins |
| D. | all of the above |
| Answer» E. | |
| 8. |
Signal sequences are part of a protein that |
| 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 |
| Answer» D. refold proteins in prion-associated diseases | |
| 9. |
Individuals with PKU disease are mentally retarded unless |
| 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 |
| Answer» B. tyrosine in the diet is restricted | |
| 10. |
BRACl, an inherited form of breast cancer, regulates cell division by |
| 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 |
| Answer» E. | |
| 11. |
Protein folding is |
| A. | automatic, mediated by the protein itself |
| B. | mediated by other proteins called chaperones |
| C. | mediated by the ribosomes |
| D. | none of the above |
| Answer» C. mediated by the ribosomes | |