The correct answer is (a). Bacteria contain cytoplasm but viruses do not.
Bacteria are single-celled organisms that are prokaryotes, meaning they do not have a nucleus or other membrane-bound organelles. They are typically about 1 micrometer in diameter and can be found in a wide variety of environments, including soil, water, and the human body.
Viruses are much smaller than bacteria and are not considered to be living organisms. They are essentially a protein coat that surrounds a strand of nucleic acid (DNA or RNA). Viruses can only replicate inside the cells of other organisms, which they do by hijacking the cell’s machinery.
Option (b) is incorrect because bacteria do not contain mitochondria. Mitochondria are organelles that are found in eukaryotic cells (cells with a nucleus) and are responsible for energy production.
Option (c) is incorrect because viruses do not contain mitochondria. Mitochondria are organelles that are found in eukaryotic cells (cells with a nucleus) and are responsible for energy production.
Option (d) is incorrect because viruses do not have a cell membrane. A cell membrane is a lipid bilayer that surrounds all cells and is responsible for regulating the movement of substances into and out of the cell.