However, in the form of N2, nitrogen is unusable by all organisms except for a few primitive bacteria that are capable of converting N2 gas to ammonia (NH3). This process of conversion is called nitrogen fixation, and makes the nitrogen available for use by organisms.
1 Simple carbohydrates are often used as building blocks of larger, complex carbohydrates. 2  The empirical structure of simple carbohydrate is C 6 H 12 O 6 or (CH 2 O) 6 while that of complex carbohydrate is (C 6 H 10 O 5) n, in which ânâ is the number of monomer units.
This article will cover the basics of carbohydrates (âcarbsâ) â what they are, why we need them, and which types are better for our health. Carbohydrates are organic compounds that contain single, double, or multiple sugar units. Simple sugars are only one or two sugar units long and are typically sweet tasting whereas complex carbohydrates are thousands of sugar units long and have a starchy taste.