Question

which of the following cells are without endoplasmic reticulum ??
a) amphibian monocytes.
b) matured erythrocytes of mammal.
c) matured leucocytes of mammal
d) mammalian monocytes ​

Answer 1

Answer:

b) matured erythrocytes of mammal

Answer 2

cells which are without endoplasmic reticulum are matured erythrocytes of mammal.

• the endoplasmic reticulum has great importance in transportation and protein folding in the eukaryotic organisms.
• it is a cell organelle which have two sub units- rough endoplasmic reticulum (RER), and smooth endoplasmic reticulum (SER).
• this oraganelle is absent in a matured erythrocyte or Red Blood Cell (RBC).
• the RBC are biconcave, circular, non nucleated cell and the absence of ER reduces is surface area so that it can easily squeeze into the capillaries.

hence, the correct option is  b) matured erythrocytes of mammal.