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Which of the following contain a metal atom? (a)Riboflavin (b)vitamin B12 (c)vitamin B6 (d)vitamin A?
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Which of the following contain a metal atom? (a)Riboflavin (b)vitamin ...
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Metal atoms are typically found in the form of metal ions in biological molecules. Among the vitamins mentioned, only vitamin B12 contains a metal atom.

Vitamin B12:
- Vitamin B12 contains cobalt, which is a transition metal.
- Cobalt is essential for the formation of red blood cells and the proper functioning of the nervous system.
- The metal ion is coordinated to a corrin ring, which is a tetrapyrrole macrocycle.

Riboflavin:
- Riboflavin, also known as vitamin B2, does not contain a metal atom.
- It is a water-soluble vitamin that functions as a cofactor for various enzymes involved in energy metabolism.

Vitamin B6:
- Vitamin B6, also known as pyridoxine, does not contain a metal atom.
- It is a water-soluble vitamin that plays a role in amino acid metabolism, neurotransmitter synthesis, and hemoglobin synthesis.

Vitamin A:
- Vitamin A does not contain a metal atom.
- It is a fat-soluble vitamin that is essential for vision, immune function, and cell growth and differentiation.

In summary, only vitamin B12 contains a metal atom, which is cobalt. Riboflavin, vitamin B6, and vitamin A do not contain metal atoms.
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Which of the following contain a metal atom? (a)Riboflavin (b)vitamin ...
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Read the following text and answer the following questions on the basis of the same:Microwave oven:The spectrum of electromagnetic radiation contains a part known as microwaves. These waves have frequency and energy smaller than visible light and wavelength larger than it. What is the principle of a microwave oven and how does it work ? Our objective is to cook food or warm it up. All food items such as fruit, vegetables, meat, cereals, etc., contain water as a constituent. Now, what does it mean when we say that a certain object has become warmer? When the temperature of a body rises, the energy of the random motion of atoms and molecules increases and the molecules travel or vibrate or rotate with higher energies. The frequency of rotation of water molecules is about 2.45 gigahertz (GHz). If water receives microwaves of this frequency, its molecules absorb this radiation, which is equivalent to heating up water. These molecules share this energy with neighbouring food molecules, heating up the food. One should use porcelain vessels and non metal containers in a microwave oven because of the danger of getting a shock from accumulated electric charges. Metals may also melt from heating. The porcelain container remains unaffected and cool, because its large molecules vibrate and rotate with much smaller frequencies, and thus cannot absorb microwaves. Hence, they do not get eaten up. Thus, the basic principle of a microwave oven is to generate microwave radiation of appropriate frequency in the working space of the oven where we keep food. This way energy is not wasted in heating up the vessel. In the conventional heating method, the vessel on the burner gets heated first and then the food inside gets heated because of transfer of energy from the vessel. In the microwave oven, on the other hand, energy is directly delivered to water molecules which are shared by the entire food.Q. When the temperature of a body rises

Which of the following contain a metal atom? (a)Riboflavin (b)vitamin B12 (c)vitamin B6 (d)vitamin A?
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Which of the following contain a metal atom? (a)Riboflavin (b)vitamin B12 (c)vitamin B6 (d)vitamin A? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Which of the following contain a metal atom? (a)Riboflavin (b)vitamin B12 (c)vitamin B6 (d)vitamin A? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following contain a metal atom? (a)Riboflavin (b)vitamin B12 (c)vitamin B6 (d)vitamin A?.
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