Question

Which one of the following is associated with osmoregulation in amoeba?
A. Endoplasm
B. Mitochondria
C. Contractile vacuole
D. Plasma membrane

Answer 1

Hint: Amoeba is a type of eukaryotic organism whose bodies are generally composed of a single cell. The cells of amoeba possess certain characteristic features, like those of other eukaryotic organisms. The cytoplasm of an amoeboid cell and other cellular contents are surrounded by a cell membrane.

Complete answer:
Amoeba is a type of microorganism whose body is formed with a single cell i.e it is a unicellular microorganism. The cell of an amoeba is eukaryotic. These microscopic organisms are commonly observed in water bodies such as ponds, lakes, and slow-moving rivers.
Osmoregulation is a system of transport that maintains the osmotic pressure of fluids and electrolyte balance in organisms. In the case of animals, this process is tracked out by osmoreceptors, which can find changes in osmotic pressure
In the body of an Amoeba, the process of osmoregulation performs through contractile vacuole. Through the process of osmoregulation, the contractile vacuole plays a vital role to regulate the water balance in the cell of amoeba. In a eukaryotic cell of Amoeba, the endoplasm which is present at its posterior end contains a single contractile vacuole. It is clear rounded and pulsating and filled with watery fluid. The contractile vacuole is enclosed by a unit membrane. There is a region surrounding the membrane of vacuole which contains many tiny feeder vacuoles and mitochondria. This region helps in the osmoregulatory and excretory activities of the animal.
Mitochondria are present in the cytoplasm and it is responsible for the production of the energy in the form of ATP. ATP is required for various cellular functions and to maintain the internal environment as well. The plasma membrane in Amoeba is a layer of protein and lipid that surrounds the body and is semi permeable in nature. It aids in exchange of gases and breathing in Amoeba.
Endoplasm of Amoeba is the inner granulated dense cytoplasmic part. It helps in the movement through flowing to extend its body and move forward.
Thus, the right option is C.

Note: Amoeba is a type of eukaryotic microorganism that is single-celled or unicellular microorganism. Osmoregulation is a transport mechanism which takes place in unicellular protist. It helps to maintain the osmotic pressure inside the cell. In amoeba, there is a contractile vacuole present. This vacuole is the organs that are known for osmoregulation. It regulates the balance of salt and water inside a cell.