Which of the following living things cannot produce their own enzymes?

✅Explanation:
Enzymes are proteins that catalyze biochemical reactions. Living organisms like bacteria and cyanobacteria can produce their own enzymes to carry out necessary metabolic functions. However, viruses are not considered living organisms in the traditional sense because they cannot produce their own enzymes or carry out metabolic processes on their own. They rely entirely on the host cell's machinery to replicate and function.

📌Other Options Explanation:

(a) Bacteria:
-Bacteria are living organisms and can produce their own enzymes to carry out metabolic processes, such as digestion and replication.

(b) Cyanobacteria:
-Cyanobacteria are photosynthetic bacteria and, like other bacteria, can produce their own enzymes.