Which of the following are covered by a single membrane?
(a) Mitochondria
(b) Vacuole
(c) Lysosome
(d) Plastid
Answer: (c)
Lysosomes are the single membraned sac like structures present in cytoplasm which carry digestive enzymes and help in food digestion. These are known as suicide bags of cell as they dispose the digestive enzymes in extreme starvation cases and kills the cell.
Plastids are double membraned organelle
Mitochondria is double membraned organelle where pyruvate molecule is turned into ATP on the surface of the membranes.
Therefore, option (c) is correct.