HIV is a disease caused by the human immunodeficiency virus (HIV), which leads to acquired immunodeficiency syndrome (AIDS). It is not caused by tuberculosis, fever disease, or cancer. The virus attacks the immune system, particularly CD4 cells, making the body ...
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Modern techniques allow us to produce magnified images of surfaces of elements, revealing the structure of atoms.
Enzymes are absent in viruses. Viruses lack cellular structure and do not carry out metabolic processes independently. They rely on host cells for replication and do not possess their own enzymes for metabolism.
Viruses are considered non-living because they can crystallize. Unlike living organisms, viruses are not cellular and can exist in a crystalline form outside of host cells, remaining inert until they infect a host to reproduce.
Dalton’s work laid the foundation for understanding atomic structure by introducing the concept of atoms as the fundamental units of elements.