Question

The most abundant organic molecule on the surface of the Earth is
1. Cellulose
2. RNA
3. DNA
4. Haemoglobin

Answer 1

Correct Answer - Option 1 : Cellulose

• Cellulose is the most abundant organic compound on Earth.
• It is used in textiles, paper, and plastic materials. Wood, paper, and cotton all contain cellulose.
• In plants, the cell wall is constituted with cellulose.
• Its chemical formula is - (C6H10O5)n.

Differences between DNA and RNA:

DNA	RNA
DNA is usually double-stranded, has two separate strands that are connected	RNA molecules are single-stranded and can adopt very complex three-dimensional structures.
DNA contains the slightly different sugar deoxyribose (a type of ribose that lacks one oxygen atom)	RNA contains the sugar ribose
DNA is much larger than RNA with millions of nucleotides.	RNA is smaller with hundreds of nucleotides.
DNA is self-replicating.	RNA is synthesized from DNA.