SSC Stenographer 2022 PYQ — Question 118

 The correct answer is option 2 i.e. virus

• Cells are fundamental units of life and are present in all living organisms, including bacteria, viruses, fungi, and algae. However, it's essential to clarify the role and application of cells in each of these categories:
• 1) Bacteria: Bacteria are single-celled organisms, and cells are integral to their structure and function. Cells are essential for all aspects of bacterial life, such as metabolism, reproduction, and response to the environment.
• 2) Virus: Viruses, on the other hand, are not considered complete cells. They are composed of genetic material (either DNA or RNA) enclosed in a protein coat but lack the cellular machinery and metabolic processes found in living cells.
• 3) Fungi: Fungi are multicellular organisms with complex cell structures. Cells in fungi play crucial roles in processes like nutrient absorption, reproduction, and growth.
• 4) Algae: Algae are primarily multicellular organisms with cells that contain chloroplasts for photosynthesis. These cells are vital for energy production and growth in algae.
• So, while cells are essential for bacteria, fungi, and algae, they are not applicable in the same sense for viruses since viruses are not complete cells but rather genetic material enclosed in a protein coat.