Answer:
An iron atom located on the heme portion of hemoglobin
Explanation:
Oxygen is attached to an <em>iron</em> atom located on the<em> heme</em> portion of hemoglobin.
Hemogoblin is a protein present in the red blood cells of several vertebrates. The main function of this protein is to transport oxygen through blood. The heme portion consists of an organic cyclic compound that contains 4 nitrogen atoms, which bond to an iron atom.
Option D for sure as it includes the phrase calorie which is a measure of energy.
Explanation:
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Four effects of heat are :-
- In electric Heaters
- In geysers
- In thermos [ a bottle type used to keep water at its nominal temperature when is was inserted]
- In Micro Oven and OTG's
Five examples of Conductors :-
- Graphite
- Silver
- Copper
- Alumunium
- Steel
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It reacts well with the leftover hydrogen chloride in the stomach. It's also non-toxic. The products formed by the reaction are also non-toxic.
Caffeine is a Central Nervous System stimulant of the methlyxanthine class. It is the world's most widely consumed psychoactive drug. Unlike many other psychoactive substances, it is legal and unregulated im nearly all parts of the world.