CUET Preparation Today
Match the biological entity given in List-I with the metal involved in it given in List-II
Choose the correct answer from the options given below: |
(A)-(IV), (B)-(I), (C)-(III), (D)-(II) (A)-(III), (B)-(I), (C)-(II), (D)-(IV) (A)-(II), (B)-(I), (C)-(IV), (D)-(III) (A)-(II), (B)-(I), (C)-(III), (D)-(IV) |
(A)-(II), (B)-(I), (C)-(IV), (D)-(III) |
The correct answer is Option (3) → (A)-(II), (B)-(I), (C)-(IV), (D)-(III)
(A) Chlorophyll — (II) Magnesium ($Mg$): Chlorophyll, the green pigment in plants responsible for photosynthesis, contains a magnesium ion at the center of its chlorin ring system. (B) Haemoglobin — (I) Iron ($Fe$): Haemoglobin is the protein in red blood cells that transports oxygen. Each heme group within the protein contains an iron atom in the $+2$ oxidation state ($Fe^{2+}$) which binds to oxygen molecules. (C) Vitamin $B_{12}$ — (IV) Cobalt ($Co$): Also known as cobalamin, this vitamin is unique because it is the only vitamin that contains a metal ion. A cobalt atom is situated at the center of its corrin ring. (D) Urease — (III) Nickel ($Ni$): Urease is an enzyme that catalyzes the hydrolysis of urea into ammonia and carbon dioxide. It was the first enzyme ever crystallized and is famous for containing a nickel metallocenter. |
