Which Statement Is NOT True About Vitamin B₁₂

question 7

Multiple Choice

Which statement is NOT true about vitamin B₁₂?

• A) Vitamin B₁₂ contains a porphyrin ring.
• B) Vitamin B₁₂ contains a carbon-cobalt bond.
• C) Vitamin B₁₂ readily undergoes homolytic bond cleavage.
• D) Deficiency of vitamin B₁₂ causes pernicious anemia.
• E) Vitamin B₁₂ catalyzes hydrogen atom exchange with solvent H₂O.

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Definitions:

Carbon

A chemical element with symbol C, essential as the basis for all known living organisms, and forming the basis of organic chemistry.

Enzymes

Biological molecules that significantly speed up the rate of virtually all of the chemical reactions that take place within cells.

Magnesium

A chemical element with the symbol Mg, crucial for human health and various biological processes.

Iron

A chemical element with symbol Fe, known for its role in biological processes such as oxygen transport in hemoglobin and as a component of many enzymes.