The upcoming discussion will update you about the difference between Artificial and Natural Systems of Classification. Difference # Artificial System: 1. The system is highly useful in the field for quick identification of organisms. 2. Artificial system often utilizes one or two morphological traits. 3. An artificial system may use habit and habitat as criteria for classification. 4. The system [...]
The following points highlight the four main Components of Viruses. The components are: 1. Nucleoid 2. Capsid 3. Envelope 4. Enzymes. Component # 1. Nucleoid: It represents the viral chromosome. Nucleoid or viral chromosome is made of a single molecule of nucleic acid. It may be linear or circular with various degrees of coiling. Nucleoid is the infective part of [...]
The following points highlight the two main types of reproductive cycle in virus. The types are: 1. Lytic Cycle 2. Lysogenic Cycle. Type # 1. Lytic Cycle (Fig. 2.5): It is the reproductive cycle of virulent phages, e.g., T4 bacteriophage. The phage attaches itself to the host cell (e.g., Escherichia coli) through its tail fibres. The fibres bend and bring [...]