Which of the following are non-cellular pathogens? A - HSC - SSCE Biology - Question 1 - 2020 - Paper 1

Prions are infectious agents composed primarily of protein, which lack nucleic acids (DNA or RNA) and thus do not fit into the traditional definitions of cellular organisms. Unlike bacteria, fungi, and protozoa, which are all cellular organisms, prions represent a unique class of non-cellular pathogens that can induce abnormal folding of specific proteins, leading to disease.