Question

Which of the following does not have DNA?
A) Nucleus
B) Mitochondria
C) Ribosomes
D) Chloroplast

Answer 1

Hint: Some cell organelles are endosymbionts, resulting from an endosymbiotic mutualistic relationship. These organelles function as semi-autonomous organelles, imitating themselves at any time. Aside from the nucleus, DNA is present in two other cell organelles in eukaryotic cells: chloroplast and mitochondria.

Complete answer:
The genetic instructions used for the development and functioning of all living organisms are encoded in DNA (deoxyribonucleic acid). It is the cell's genetic material that transmits encoded data from one generation to the next.
The cell's nucleus holds the majority of the cell’s inherited stuff, namely DNA in the form of chromatin, a DNA-protein complex. Both mitochondria and plastids have their own ribosomes and hereditary material. Both mitochondrial DNA and plastid DNA have properties that allow them to produce proteins that are essential for mitochondrial and plastid function.
Ribosomes are thick, circular, and granular particles that exist freely in the grid (cytoplasm) or are linked to the harsh endoplasmic reticulum. Ribonucleic acid (RNA) and proteins are the most important constituents of ribosomes. Ribosomes are cell organelles that lack a film. Ribosomes do not contain any DNA.

Hence, option C- Ribosome is the correct answer.

Note:
Mitochondria are twofold membranous organelles that are round and hollow or hotdog shaped and found in all eukaryotic cells. In the construction, the inward and external films differ in that the external one is smooth while the internal one has enfolding’s known as cristae. The internal layer consists of a grid that contains a single round DNA, a couple of RNAs, 70s ribosomes, and various parts required for protein synthesis. Chloroplasts are also two-layer bound and are found in the cytoplasm of eukaryotic plant cells. They consume light and use light and natural carbon dioxide to produce food, such as sugar, for plant cells.