Question

Which of the following is iron porphyrin coenzyme or cofactor [DPMT 1987]
A) Cytochrome
B) FAD
C) CoA
D) NAD

Answer 1

Answer:

The answer is option A, Cytochrome

Explanation:

• The Cytochrome contains protein like hemoglobin and myoglobin.
• Cytochrome are also a hemoprotein
• It helps energy transfer within  the cells.

• It acts as part of membrane protein.  

Answer 2

Which of the following is iron porphyrin coenzyme or cofactor ?

A) Cytochrome

B) FAD

C) CoA

D) NAD

The correct answer is :

A) Cytochrome

• Explanation :
  Cytochrome is iron porphyrin coenzyme or cofactor
• Cytochrome is a hemo-protein. Hemes are iron-rich porphyrins. Cytochromes are hemo proteins widely found in nature.
• Cytochromes are also found in proteins such as hemoglobin and myoglobin.
• The main function of cytochromes is as an integral part of proteins.
• Cytochrome porphyrin is the coenzyme or cofactor.

Hence, option (a) will be the correct answer.

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