Question

A unit membrane is absent over
(a)Lysosome
(b)Microbody
(c)Golgi apparatus
(d)Ribosome

Answer 1

Hint: The unit membrane is present in all cellular organelles except the non-membranous organelles. These organelles are small and are involved in the translation process to synthesize proteins and the majority are independent in the cytoplasm.

Complete answer:
The unit membrane means the compound membrane of cells containing organelles which consist of 3-layers, which are the inner lipid part and two outer layers of proteins.
In the majority of cell organelles such as the Golgi apparatus, microbody, and lysosomes the unit membrane encapsulates the organelle but in the case of Ribosomes, there is no unit membrane as they are non-membranous organelle.

Additional Information: -Ribosomes are made up of two subunits, and are found majorly in independent form in the cytoplasm. Many are embedded in the endoplasmic reticulum, which constitutes the rough endoplasmic reticulum.
-Lysosomes are known as the 'suicide bag' of the cell, as they contain a lot of digestive enzymes that will destroy the cell once they come in contact with the cytoplasm.
-Golgi apparatus are cell organelles that are common in eukaryotes and are involved in the vesicle packaging and even the packaging of proteins to the surrounding system.
So, the correct answer is 'Ribosome'.

Note: -Lysosomes are involved in phagocytosis, where the food items are digested using the enzymes present in the lysosome. They are also a major part of apoptosis.
-Apoptosis is the programmed cell death, which is a usual defence mechanism used by cells to kill or destroy the cell when they are infected by bacteria or viruses.
-Ribosomes are a major component of the translation process where the ribosomes read the mRNA and construct the proteins using the amino acids.