DNA vs. RNA
The structure of RNA nucleotides is very similar to that of DNA nucleotides, with the main difference being that the ribose sugar backbone in RNA has a hydroxyl (-OH) group that DNA does not. Another minor difference is that DNA uses the base thymine (T) in place of uracil (U). Despite great structural similarities, DNA and RNA play very different roles from one another in modern cells. Another major difference between DNA and RNA is that DNA is usually found in a double-stranded form in cells, while RNA is typically found in a single-stranded form. The lack of a paired strand allows RNA to fold into complex, three-dimensional structures while DNA can not do this. RNA folding is typically mediated by the same type interactions that are found in DNA, with the difference being that bonds are formed within a single strand in RNA, rather than between two strands, in DNA. Single-stranded RNA is unstable and is easily damaged by enzymes. By doubling the existing RNA molecule, and using deoxyribose sugar instead of ribose, DNA evolved as a much more stable form to pass genetic information with accuracy. Nucleic Acids are what DNA and RNA are located within.
Amino acids make proteins
Proteins make cells
Cells make tissue
Tissues make organs
Organs make organ systems
Organ systems make organism
Amino acids make proteins
Proteins make cells
Cells make tissue
Tissues make organs
Organs make organ systems
Organ systems make organism
Now you MUST choose...