In this article we will discuss:- 1. Meaning of tRNA 2. Structure of tRNA 3. Initiator Transfer RNA. Meaning of tRNA: Transfer RNAs (tRNAs), also called "soluble RNAs" (sRNAs) are small molecules varying from 75 to 100 nucleotides in length. They carry amino acids and bring them to ribosomes to form the polypeptide chain. There are 20 amino acids but [...]
In this article we will discuss about the meaning and structure of nucleic acids. Meaning of Nucleic Acids: Nucleic acids are a long chain polymers of nucleotides which are joined together by means of phosphodiester linkages. In phosphodiester bonds, one phosphoric acid molecule forms bonds with the 3' carbon of one pentose molecule as well as with the 5' carbon [...]
In this article we will discuss about the replication of genetic RNA. Several viruses and bacteriophages contain single- or double-stranded RNA as their genetic material (Table 3.1). Replication of these RNA chromosomes occurs in the host cytoplasm following one of the two modes given below: (i) Direct use of RNA template for RNA synthesis (RNA RNA) by the enzyme -'RNA [...]