RNA lacks the nitrogen base of
RNA lacks the nitrogen base of
Cytosine
Adenine
Uracil
Thymine
The Correct Option is D
Solution and Explanation
RNA, which stands for Ribonucleic Acid, is a nucleic acid similar to DNA but differs in several key aspects. One major difference lies in the nitrogenous bases that are part of its structure. RNA contains the bases Adenine, Cytosine, Guanine, and Uracil.
Unlike DNA, which contains Thymine as one of its four bases, RNA lacks Thymine. Instead of Thymine, RNA contains Uracil, which pairs with Adenine during the process of transcription. This means that, unlike DNA, which has the base pairs Adenine-Thymine and Guanine-Cytosine, RNA will often have Adenine-Uracil and Guanine-Cytosine.
Given the options:
- Cytosine
- Adenine
- Uracil
- Thymine
The correct answer is Thymine, as it is not present in RNA; instead, RNA contains Uracil.
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Concepts Used:
Biomolecules
Biomolecules are the most essential organic molecules, which are involved in the maintenance and metabolic processes of living organisms. These non-living molecules are the actual foot-soldiers of the battle of sustenance of life.
There are four major classes of Biomolecules – Carbohydrates, Proteins, Nucleic acids and Lipids.
- Carbohydrates are chemically defined as polyhydroxy aldehydes or ketones or compounds which produce them on hydrolysis.
- Proteins are another class of indispensable biomolecules, which make up around 50per cent of the cellular dry weight. Proteins are polymers of amino acids arranged in the form of polypeptide chains. The structure of proteins is classified as primary, secondary, tertiary and quaternary in some cases.
- Nucleic acids refer to the genetic material found in the cell that carries all the hereditary information from parents to progeny. There are two types of nucleic acids namely, deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). The main function of nucleic acid is the transfer of genetic information and synthesis of proteins by processes known as translation and transcription.
- Lipids are organic substances that are insoluble in water, soluble in organic solvents, are related to fatty acids and are utilized by the living cell.