Multiple Fission MCQ - Practice Questions with Answers

• In multiple fissions, the parent nucleus undergoes repeated divisions to form a large number of daughter nuclei. 
• This is followed by the division of the cytoplasm into as many parts as there are nuclei, each part enclosing one nucleus. 
• As a result, a number of daughter cells are formed from a single parent cell at the same time. 
• This process usually takes place under unfavourable environmental conditions. 
• The multiple fissions occur in most algae, fungi and some protozoans, e.g., Amoeba, Plasmodium (malaria parasite) and Monocytes etc.

Multiple Fission in Amoeba:

• In unfavourable conditions, amoeba divides by multiple fission. 
• It withdraws its pseudopodia, becomes spherical and secretes three-layered cyst around itself. 
• Its nucleus undergoes repeated mitosis division forming 500- 600 daughter nuclei. 
• Each daughter nuclei get surrounded by a mass of cytoplasm and divide into minute amoebae. 
• On getting favourable conditions the cyst ruptures to release the amoebae which soon grows into an adult amoeba.

Multiple Fission in Plasmodium:

• The multiple fission in Plasmodium occurs in schizont, which is a rounded unicellular structure present in hepatocytes and RBCs of man and in oocyst, which is present over the stomach of female Anopheles mosquito.
• The multiple fission in schizont is called schizogony and the daughter organisms so formed are called merozoites.
• The multiple fission in oocyst is called sporogony and the daughter organisms so formed are called sporozoites.