MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Biochemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
When oxygen binds to a heme-containing protein, the two open coordination bonds of Fe2+ are occupied by___________ |
| A. | One O atom and one amino acid atom |
| B. | One O<sub>2</sub> molecule and one amino acid atom |
| C. | One O<sub>2</sub> molecule and one heme atom |
| D. | Two O atoms |
| Answer» C. One O<sub>2</sub> molecule and one heme atom | |
| 2. |
The interactions of ligands with proteins are ___________ |
| A. | Relatively nonspecific |
| B. | Relatively rare in biological systems |
| C. | Usually irreversible |
| D. | Usually transient |
| Answer» E. | |
| 3. |
Myoglobin and the subunits of hemoglobin have ___________ |
| A. | Very different primary and tertiary structures |
| B. | Very similar primary and tertiary structures |
| C. | Very similar primary structures, but different tertiary structures |
| D. | Very similar tertiary structures, but different primary structures |
| Answer» E. | |
| 4. |
In the binding of oxygen to myoglobin, the relationship between the concentration of oxygen and the fraction of binding sites occupied can best be described as ___________ |
| A. | Hyperbolic |
| B. | Linear with a negative slope |
| C. | Linear with a positive slope |
| D. | Parabolic |
| Answer» B. Linear with a negative slope | |
| 5. |
Myoglobin binding of O2 depends on ___________ |
| A. | Hemoglobin concentration |
| B. | O<sub>2</sub> concentration and affinity of myoglobin for O<sub>2</sub> |
| C. | K<sub>a</sub> |
| D. | K<sub>d</sub> |
| Answer» C. K<sub>a</sub> | |
| 6. |
His93 is also called ________ |
| A. | His F8 |
| B. | His F7 |
| C. | His F6 |
| D. | His F5 |
| Answer» B. His F7 | |
| 7. |
Myoglobin is particularly abundant in ________ |
| A. | Nerves |
| B. | Muscles |
| C. | Blood cells |
| D. | Skin |
| Answer» C. Blood cells | |