LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

MOLECULAR BIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which is NOT an organic carbon compound?
A
carbon dioxide
B
carbohydrates
C
DNA
D
cholesterol
Explanation: 

Detailed explanation-1: -Organic molecules don’t just contain carbon. They contain hydrocarbons or carbon bonded to hydrogen. But in carbondioxide, it is not present, so it is not an organic compound.

Detailed explanation-2: -Carbides, carbonates, and cyanides form the only carbon-containing compounds not known as organic.

Detailed explanation-3: -Not all carbon-based molecules are organic. Some, such as carbon dioxide (or CO2), can be “inorganic.” The lack of hydrogen is why many chemists classify carbon dioxide this way. To be “organic, ‘’ these chemists argue, a molecule must combine its carbon with some hydrogens.

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