The metal, which is a constituent of vitamin B12 is------? A. Iron B. Magnesium C. Zinc D. Cobalt (Answer)

The metal, which is a constituent of vitamin B12 is------?

A. Iron

B. Magnesium

C. Zinc

D. Cobalt (Answer)
by

1 Answer

Answer :

D. Cobalt (Answer)
by

Related questions

The metal, which is a constituent of vitamin B12 is - (1) Iron (2) Magnesium (3) Zinc (4) Cobalt

Description : The metal, which is a constituent of vitamin B12 is - (1) Iron (2) Magnesium (3) Zinc (4) Cobalt

Last Answer : (4) Cobalt Explanation: Vitamin B12 is a "generic descriptor for compounds exhibiting the biologic activity of cyanocobalarnin: the antianemia factor of liver extract that contains cobalt, a cyano group ... lead to anemia, as well as nerve and brain damage, which may eventually become irreversible.

The metal, which is a constituent of vitamin B12 is (1) Iron (2) Magnesium (3) Zinc (4) Cobalt

Description : The metal, which is a constituent of vitamin B12 is (1) Iron (2) Magnesium (3) Zinc (4) Cobalt

Last Answer : Cobalt

Metal in Vitamin B12 is (A) Copper (B) Cobalt (C) Iron (D) Zinc

Description : Metal in Vitamin B12 is (A) Copper (B) Cobalt (C) Iron (D) Zinc

Last Answer : Answer : B

The metal ion present in vitamin B12 is (1) cobalt (2) zinc (3) nickel (4) iron

Description : The metal ion present in vitamin B12 is (1) cobalt (2) zinc (3) nickel (4) iron

Last Answer : (1) cobalt Explanation: The structure of B12 is based on a corrin ring, which is similar to the porphyrin ring found in heme, chlorophyll, and cytochrome. It contains the biochemically rare element cobalt sitting in the center of the ring. Also called cobalamin, it is a water-soluble vitamin.

The metal ion present in vitamin B12 is : (1) cobalt (2) zinc (3) nickel (4) iron

Description : The metal ion present in vitamin B12 is : (1) cobalt (2) zinc (3) nickel (4) iron

Last Answer : cobalt

Cobalt is a constituent of (A) Folic acid (B) Vitamin B12 (C) Niacin (D) Biotin

Description : Cobalt is a constituent of (A) Folic acid (B) Vitamin B12 (C) Niacin (D) Biotin

Last Answer : Answer : B

The central structure of B12 referred to as corrin ring system consists of (A) Cobalt (B) Manganese (C) Magnesium (D) Iron

Description : The central structure of B12 referred to as corrin ring system consists of (A) Cobalt (B) Manganese (C) Magnesium (D) Iron

Last Answer : Answer : A

The central heavy metal cobalt of vitamin B12 is coordinately bound to (A) Cyanide group (B) Amino group (C) Carboxyl group (D) Sulphide group

Description : The central heavy metal cobalt of vitamin B12 is coordinately bound to (A) Cyanide group (B) Amino group (C) Carboxyl group (D) Sulphide group

Last Answer : Answer : A

Chlorophyll contains – (1) Iron (2) Magnesium (3) Cobalt (4) Zinc

Description : Chlorophyll contains – (1) Iron (2) Magnesium (3) Cobalt (4) Zinc

Last Answer : (2) Magnesium Explanation: Chlorophyll molecule contains a magnesium ion. Green plants are dependent on chlorophyll for photosynthesis, and magnesium is required for chlorophyll production.

Chlorophyll contains (1) Iron (2) Magnesium (3) Cobalt (4) Zinc

Description : Chlorophyll contains (1) Iron (2) Magnesium (3) Cobalt (4) Zinc

Last Answer : Magnesium

The trace metal present in insulin is – (1) iron (2) zinc (3) cobalt (4) manganese

Description : The trace metal present in insulin is – (1) iron (2) zinc (3) cobalt (4) manganese

Last Answer : (2) zinc Explanation: Trace elements play important role in Insulin metabolism. The relationship between diabetes, insulin and zinc (Zn) is complex with no clear cause and effect ... and free radicals associated with decreases in intracellular Zn and in Zn dependent antioxidant enzymes.

The trace metal present in insulin is (1) iron (2) zinc (3) cobalt (4) manganese

Description : The trace metal present in insulin is (1) iron (2) zinc (3) cobalt (4) manganese

Last Answer : zinc

Cobalt is essential component of (A) Vitamin B1 (B) Vitamin B6 (C) Vitamin B12 (D) All of these

Description : Cobalt is essential component of (A) Vitamin B1 (B) Vitamin B6 (C) Vitamin B12 (D) All of these

Last Answer : Answer : C

Cobalt forms an integral part of the vitamin: (A) B1 (B) B6 (C) B12 (D) Folate

Description : Cobalt forms an integral part of the vitamin: (A) B1 (B) B6 (C) B12 (D) Folate

Last Answer : Answer : C

A vitamin requires cobalt for its activity. The vitamin is - (1) Vitamin B12 (2) Vitamin D (3) Vitamin B2 (4) Vitamin A

Description : A vitamin requires cobalt for its activity. The vitamin is - (1) Vitamin B12 (2) Vitamin D (3) Vitamin B2 (4) Vitamin A

Last Answer : (1) Vitamin B12 Explanation: Vitamin B12, vitamin B1, or vitamin B12, also called cobalarnin, is a watersoluble vitamin with a key role in the normal functioning of the brain and nervous ... compounds (vitamers), all of which have vitamin activity. It contains the biochemically rare element cobalt.

The presence of Cobalt in Vitamin B12 was established for the first time by – (1) Hydrolysis test (2) Spectroscopy (3) Borax-Bead test (4) Sodium Nitroprusside test

Description : The presence of Cobalt in Vitamin B12 was established for the first time by – (1) Hydrolysis test (2) Spectroscopy (3) Borax-Bead test (4) Sodium Nitroprusside test

Last Answer : (2) Spectroscopy Explanation: Atomic absorption spectroscopy is an analytical chemistry technique used for determining concentration of particular metal element and is widely used in pharmaceutics. It was used for the determination of cobalt in Vitamin B12.

A vitamin requires cobalt for its activity. The vitamin is (1) Vitamin B12 (2) Vitamin D (3) Vitamin B2 (4) Vitamin A

Description : A vitamin requires cobalt for its activity. The vitamin is (1) Vitamin B12 (2) Vitamin D (3) Vitamin B2 (4) Vitamin A

Last Answer : Vitamin B12

The presence of Cobalt in Vitamin B12 was established for the first time by (1) Hydrolysis test (2) Spectroscopy (3) Borax-Bead test (4) Sodium Nitroprusside test

Description : The presence of Cobalt in Vitamin B12 was established for the first time by (1) Hydrolysis test (2) Spectroscopy (3) Borax-Bead test (4) Sodium Nitroprusside test

Last Answer : Spectroscopy

Vitamin E reduces the requirement of (A) Iron (B) Zinc (C) Selenium (D) Magnesium

Description : Vitamin E reduces the requirement of (A) Iron (B) Zinc (C) Selenium (D) Magnesium

Last Answer : Answer : C

Enzyme catalase has non-protein metal asA-magnesium B-manganese C-iron D-zinc

Description : Enzyme catalase has non-protein metal asA-magnesium B-manganese C-iron D-zinc

Last Answer : iron

The metal present in insulin is (1) Copper (2) Iron (3) Zinc (4) Magnesium

Description : The metal present in insulin is (1) Copper (2) Iron (3) Zinc (4) Magnesium

Last Answer : Zinc

Metal required for polymerization of insulin is (A) Copper (B) Chromium (C) Cobalt (D) Zinc

Description : Metal required for polymerization of insulin is (A) Copper (B) Chromium (C) Cobalt (D) Zinc

Last Answer : Answer : D

Magnesium is a constituent metal of – (1) Chlorophyll molecule (2) DNA (3) Mitochondria (4) Ribosomes

Description : Magnesium is a constituent metal of – (1) Chlorophyll molecule (2) DNA (3) Mitochondria (4) Ribosomes

Last Answer : (1) Chlorophyll molecule Explanation: The basic structure of chlorophyll consists of a porphyrin ring, coordinated to a central atom. This is very similar in structure to the heme group found in ... was discovered in 1906 and was the first time that magnesium had been detected in living tissue.

Magnesium is a constituent metal of (1) Chlorophyll molecule (2) DNA (3) Mitochondria (4) Ribosomes

Description : Magnesium is a constituent metal of (1) Chlorophyll molecule (2) DNA (3) Mitochondria (4) Ribosomes

Last Answer :  Chlorophyll molecule

By which prove firstly presence of cobalt in B12.

Description : By which prove firstly presence of cobalt in B12.

Last Answer : Sodium nitroperoxide tes

A metallic alloy in which one of the constituent metal is __________, is called an amalgam. (A) Zinc (B) Mercury (C) Lead (D) Tin

Description : A metallic alloy in which one of the constituent metal is __________, is called an amalgam. (A) Zinc (B) Mercury (C) Lead (D) Tin

Last Answer : (B) Mercury

Which metal is important component of vitamin B12

Description : Which metal is important component of vitamin B12

Last Answer : Cobalt

In vitamin B12 which metal ion present

Description : In vitamin B12 which metal ion present

Last Answer : Cobalt

Mineral constituent of chlorophyll is - (1) Iron (2) Magnesium (3) Calcium (4) Potassium

Description : Mineral constituent of chlorophyll is - (1) Iron (2) Magnesium (3) Calcium (4) Potassium

Last Answer : (2) Magnesium Explanation: Chlorophyll is the molecule that absorbs sunlight and uses its energy to synthesize carbohydrates from CO2 and water. This process is known as photosynthesis and is the basis for ... It is found in the chloroplasts of green plants, and is what makes green plants, green.

Mineral constituent of chlorophyll is (1) Iron (2) Magnesium (3) Calcium (4) Potassium

Description : Mineral constituent of chlorophyll is (1) Iron (2) Magnesium (3) Calcium (4) Potassium

Last Answer : Magnesium

Muntz metal is a/an alloys of (A) Magnesium & tin (B) Ferrous material (C) Lead & tin (D) Copper & zinc

Description : Muntz metal is a/an alloys of (A) Magnesium & tin (B) Ferrous material (C) Lead & tin (D) Copper & zinc

Last Answer : (D) Copper & zinc

Re. the vegan diet, how do the animals we eat end up giving us Vitamin B12, Omega 3, Iron etc.

Description : Re. the vegan diet, how do the animals we eat end up giving us Vitamin B12, Omega 3, Iron etc.

Last Answer : answer:Long, snarky If cows get fiber from the grass where does the grass get its fiber if it’s just sucking up raw nutrients from the ground? If grass can be healthy by creating its own food through photosynthesis why don’t cows? Short We’re not cows. We have different nutritional requirements.

A hypochromic microcytic anemia with increased iron stores in the bone marrow may be (A) Iron responsive (B) Pyridoxine responsive (C) Vitamin B12 responsive (D) Folate responsive

Description : A hypochromic microcytic anemia with increased iron stores in the bone marrow may be (A) Iron responsive (B) Pyridoxine responsive (C) Vitamin B12 responsive (D) Folate responsive

Last Answer : Answer : B

Serum ferritin is a maker of Options: 1) Circulating Iron 2) Storage iron 3) Folate 4) Vitamin B12 Levels

Description : Serum ferritin is a maker of Options: 1) Circulating Iron 2) Storage iron 3) Folate 4) Vitamin B12 Levels

Last Answer : Correct Answer: 2) Storage iron

The substance coated on plastic tape recorder tapes is (a) zinc oxide (b) magnesium oxide (c) iron sulphate (d) iron oxide

Description : The substance coated on plastic tape recorder tapes is (a) zinc oxide (b) magnesium oxide (c) iron sulphate (d) iron oxide

Last Answer : Ans:(d)

Give reason: a) Magnesium reacts more vigorously with hydrochloric acid than zinc or copper. b) Iron takes more time to react with dilute hydrochloric acid than magnesium and zinc

Description : Give reason: a) Magnesium reacts more vigorously with hydrochloric acid than zinc or copper. b) Iron takes more time to react with dilute hydrochloric acid than magnesium and zinc

Last Answer : a) Magnesium reacts more vigorously with hydrochloric acid than zinc or copper. The reactivity of magnesium is higher than that of zinc. Hence it reacts with hydrochloric acid more vigorously. b) ... acid than magnesium and zinc As iron has lowest reactivity when compare to magnesium and zinc.

Which of the following is the correct arrangement of the given metals in ascending order of their reactivity? Zinc, Iron, Magnesium, Sodium A) Zinc > Iron > Magnesium > Sodium B) Sodium > Magnesium > Iron > Zinc C) Sodium > Zinc > Magnesium > Iron D) sodium > Magnesium > Zinc > Iron

Description : Which of the following is the correct arrangement of the given metals in ascending order of their reactivity? Zinc, Iron, Magnesium, Sodium A) Zinc > Iron > Magnesium > Sodium B) Sodium > Magnesium > Iron > Zinc C) Sodium > Zinc > Magnesium > Iron D) sodium > Magnesium > Zinc > Iron

Last Answer : D) sodium > Magnesium > Zinc > Iron

Haemoglobin formation needs both (A) Iron and Zinc (B) Iron and Calcium (C) Iron and Copper (D) Iron and Magnesium

Description : Haemoglobin formation needs both (A) Iron and Zinc (B) Iron and Calcium (C) Iron and Copper (D) Iron and Magnesium

Last Answer : Answer : C

Asbestos is formed of : (1) Calcium and Magnesium (2) Copper, Zinc and Manganese (3) Lead and Iron (4) Calcium and Zinc

Description : Asbestos is formed of : (1) Calcium and Magnesium (2) Copper, Zinc and Manganese (3) Lead and Iron (4) Calcium and Zinc

Last Answer : (1) Calcium and Magnesium Explanation: Pure and simple, asbestos is a group of naturally occurring minerals. It is composed of calcium and magnesium silicate. Asbestos occurs as veins in rocks and is mined from the ground, similar to coal.

Which one of the following metals does not form amalgam? (1) Zinc (2) Copper (3) Magnesium (4) Iron

Description : Which one of the following metals does not form amalgam? (1) Zinc (2) Copper (3) Magnesium (4) Iron

Last Answer : (4) Iron Explanation: The definition of an amalgam is a mixture of metals and mercury, which can be man-made or can be naturally occurring.

Although a deficiency of any one of the elements listed may result in chlorosis, only one of these elements is an element found in chlorophyll. Which is it?(a) Zinc (b) Iron (c) Magnesium (d) Chloride

Description : Although a deficiency of any one of the elements listed may result in chlorosis, only one of these elements is an element found in chlorophyll. Which is it?(a) Zinc (b) Iron (c) Magnesium (d) Chloride

Last Answer : (c) Magnesium

Minerals known to be required in large amounts for plant growth include (a) potassium, phosphorus, selenium, boron (b) magnesium, sulphur, iron, zinc (c) phosphorus, potassium, sulphur, calcium (d) calcium, magnesium, manganese, copper.

Description : Minerals known to be required in large amounts for plant growth include (a) potassium, phosphorus, selenium, boron (b) magnesium, sulphur, iron, zinc (c) phosphorus, potassium, sulphur, calcium (d) calcium, magnesium, manganese, copper.

Last Answer : (c) phosphorus, potassium, sulphur, calcium

In which of the following all three are macronutrients? (a) Molybdenum, magnesium, manganese (b) Nitrogen, nickel, phosphorus (c) Boron, zinc, manganese (d) Iron, copper, molybdenum

Description : In which of the following all three are macronutrients? (a) Molybdenum, magnesium, manganese (b) Nitrogen, nickel, phosphorus (c) Boron, zinc, manganese (d) Iron, copper, molybdenum

Last Answer : (d) Iron, copper, molybdenum

Yellow spots on citrus leaves is due to the deficiency of: (1) Zinc (2) Magnesium (3) Boron (4) Iron

Description : Yellow spots on citrus leaves is due to the deficiency of: (1) Zinc (2) Magnesium (3) Boron (4) Iron

Last Answer : Magnesium

Asbestos is formed of : (1) Calcium and Magnesium (2) Copper, Zinc and Manganese (3) Lead and Iron (4) Calcium and Zinc

Description : Asbestos is formed of : (1) Calcium and Magnesium (2) Copper, Zinc and Manganese (3) Lead and Iron (4) Calcium and Zinc

Last Answer : Calcium and Magnesium

Which vitamin is available to the human body through sun bathing? A. Vitamin A B. Vitamin D (Answer) C. Vitamin K D. Vitamin B12

Description : Which vitamin is available to the human body through sun bathing? A. Vitamin A B. Vitamin D (Answer) C. Vitamin K D. Vitamin B12

Last Answer : B. Vitamin D (Answer)

Which one of the following can be synthesized by Liver ----? A. Vitamin B6 B. Vitamin B12 C. Vitamin K (Answer) D. Vitamin E

Description : Which one of the following can be synthesized by Liver ----? A. Vitamin B6 B. Vitamin B12 C. Vitamin K (Answer) D. Vitamin E

Last Answer : C. Vitamin K (Answer)

The vitamin which is generally excreted by humans in urine is-----? A. Vitamin A B. Vitamin B C. Vitamin B12 D. Vitamin C (Answer)

Description : The vitamin which is generally excreted by humans in urine is-----? A. Vitamin A B. Vitamin B C. Vitamin B12 D. Vitamin C (Answer)

Last Answer : D. Vitamin C (Answer)

Magnalium is an alloy of-------? A. Magnesium and Lead B. Aluminium and Zinc C. Aluminium and Magnesium (Answer) D. Aluminium and Mercury

Description : Magnalium is an alloy of-------? A. Magnesium and Lead B. Aluminium and Zinc C. Aluminium and Magnesium (Answer) D. Aluminium and Mercury

Last Answer : C. Aluminium and Magnesium (Answer)

Metallic constituent of “Glucose tolerance factor” is (A) Sulphur (B) Cobalt (C) Chromium (D) Selenium

Description : Metallic constituent of “Glucose tolerance factor” is (A) Sulphur (B) Cobalt (C) Chromium (D) Selenium

Last Answer : Answer : C