Question

Which of the following pair lack the unit membrane?

Options

• Nucleus and E.R.

• Mitochondria and chloroplast

• Ribosome and nucleolus

• Golgi body and lysosome

Answer 1

Ribosome and nucleolus

Explanation:

Ribosomes and nucleolus are cell organelles that lack the unit membrane. Ribosomes can be present in the cytoplasm and also line the rough endoplasmic reticulum's membranes. It is made up of ribosomal proteins and RNA. The absence of a limiting membrane, the presence of chromatin, granules and fibrils of RNA and proteins distinguish the nucleolus from the rest of the nucleus.