PPT Slide

Types of RNA and their function

messenger RNA (mRNA)

intermediary for carrying the information between DNA and proteins

transfer RNA (tRNA) - the adapter

ribosomal RNA (rRNA)

component of the ribosomes (site of protein synthesis)

Differences in chemistry between DNA and RNA

RNA has ribose instead of deoxy-ribose

RNA has base uracil instead of thymine

RNA is usually not double-stranded

Deoxy-ribose

Ribose

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Notes:

Before we go into the details of transcription, let’s review what distinguishes RNA from DNA. Both are nucleic acids, but RNA nucleotides contain sugar ribose (hence the name ribo-nucleic acids) instead of deoxy-ribose found in DNA. Second difference is

There are three major types of RNA in all cells: 1) messenger RNA or mRNA is the intermediary for carrying the information between DNA and proteins. We can say that mRNA acts on the genetic level. 2) transfer RNA or tRNA is the adapter involved in tran