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| 1. |
Write the characteristics of viruses. |
| Answer» \tThey are non-cellular organisms, which is enclosed in a protective envelope.\tThe presence of spikes helps in attaching the viruses to the host cell.\tThese viruses do not grow, neither respire nor metabolize, but they reproduce.\tThey are surrounded with a protein coat – capsid and have a nucleic acid core comprising of DNA or RNA.\tThey are considered both as living and non-living things. These viruses are inactive when they are present outside of host cells but become active within host cells. These viruses cause several infections and reproduce within the host cell by using the enzymes and raw materials. | |