In this article we will discuss about the characteristics of fungi. The fungi are cosmopolitan in distribution, some are aquatic, others are terrestrial and still others are air borne. Many are parasitic on plants, animals and human beings. The plant body typically consists of branched and filamentous hyphal form, a net like structures called as mycelium. The hyphae are aseptate [...]
There are many types of RNAs, but three types of it are described here: 1. Ribosomal RNA (rRNA) 2. Messenger RNA (mRNA) 3. Transfer RNA (tRNA). Type # 1. The Ribosomal RNA (rRNA): The non-genetic RNAs are synthesized on the DNA template and are present in the nucleolus and cytoplasm. Therefore, the base sequences of rRNA and part of DNA [...]
In this article we will discuss about the classification of pili. Mainly pili are of two types: (a) Common pili which act to adhere the cell to surfaces, and (b) Sex pili which join the other bacterial cell for transfer of genome. Ottow (1975) has classified the pili into the following six groups: Group 1: Fimbriae of this group act [...]