RNA Vs DNA
RNA is as like as a DNA, but has few different structural details.
• Is usually single-stranded
• RNA nucleotides contain ribose sugar.
• RNA has the base uracil.
• Bases are A U G C
• RNA is transcribed from DNA
• RNA polymerases help in transcription process
• RNA is central to protein synthesis.
• There are 3 types of RNA: mRNA, tRNA & rRNA.
Lets summarize it briefly like below.
• Both are nucleic acids, but differ in three main ways.
1. Unlike double stranded DNA, RNA is a single-stranded molecule while DNA contains deoxyribose, RNA contains ribose
2. RNA is unstable or less stable when compared to DNA. WHY? Because it is more prone to hydrolysis.
3. The complementary base to adenine is not thymine like DNA, but it is uracil. Uracil is the unmethylated form of Thymine.
Structure of RNA
• Each nucleotide in RNA has a ribose sugar
• Adenine and guanine are purines
• cytosine and uracil are pyrimidines
• A phosphate group is attached to the 3' position of one ribose and the 5' position of the next
• Hydrogen bonds formed between cytosine and guanine and between adenine and uracil and between guanine and uracil
Types of RNA
# mRNA (Messenger RNA) - carries information from DNA of the structural gene to the ribosome.
# tRNA (Transfer RNA) - carries amino acids to mRNA at the ribosome to assembly the protein being made
# rRNA (Ribosomal RNA) - Important structural component of the ribosome where protein synthesis occurs.
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