Question

All of the following are nitrogen-containing compounds found in living organisms except...
1.) alkaloids
2.)nucleotides
3.)neurotransmitters
4.) proteins
5.)carbohydrates

Answer 1

All of the following are nitrogen-containing compounds found in living organisms except...

Ans: 5) Carbohydrates

Carbohydrates are molecules that contain only carbon, hydrogen and oxygen. Examples of carbohydrates include glucose, sucrose, starch etc.,

Alkaloids are plant based organic compounds that has nitrogen as heteroatom. Examples include piperidine, quinine etc.

Nucleotides are DNA building blocks with three components : Base (adenine, thymine, guanine, cytosine), carbohydrate and phosphorus linkage. So base has nitrogen atom.

Neurotransmitters and proteins are made up of amino acids. Since amino acids have nitrogen, neurotransmitters and proteins have nitrogen atom in them.