Question

Identify the proteins with correct function:

A. Cytochrome C - Electron Transport chain

B. Hemoglobin - Storage of \(\text{O}_{2}\) in muscle

C. Catalase - Degradation of hydrogen peroxides

D. Myoglobin - Transport of \(\text{O}_{2}\) in blood

Choose the correct answer from the options given below:

• A. A only \
• B. A and C only \
• C. B and D only \
• D. C and B only

Hint:

Hemoglobin and Myoglobin are often switched in trick questions! Remember: Hemoglobin is for Highways (blood transport), and Myoglobin is for Muscles (local storage).

Answer 1

The Correct Option is B

Step 1: Concept Proteins are optimized with precise structural variations that allow them to perform specialized biological tasks, such as moving molecules, storing nutrients, or speeding up specific chemical reactions.

Step 2: Meaning Evaluating the matching assignments between each heme-containing protein and its primary functional role in the body.

Step 3: Analysis * Statement A: Cytochrome C is a mobile electron carrier that shuttles electrons between Complex III and Complex IV along the mitochondrial inner membrane respiratory chain $\rightarrow$ Correct. * Statement B: Hemoglobin is found inside red blood cells to transport oxygen through the bloodstream, not to store it within muscle tissues $\rightarrow$ Incorrect. * Statement C: Catalase is an antioxidant enzyme that rapidly breaks down toxic hydrogen peroxide molecules into harmless water and oxygen $\rightarrow$ Correct. * Statement D: Myoglobin is a monomeric protein located in muscle tissues designed to bind and store oxygen locally, not to transport it through the blood $\rightarrow$ Incorrect.

Step 4: Conclusion The pairs with completely accurate functional descriptions are A and C, which corresponds to option B. Final Answer: (B)